Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

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Section 608 Section 608 Certification Certification Pre-Test Pre-Test Mr. Morgan Mr. Morgan HVAC/R Instructor HVAC/R Instructor

Transcript of Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Page 1: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Section 608 Certification Section 608 Certification Pre-TestPre-Test

Mr. MorganMr. Morgan

HVAC/R Instructor HVAC/R Instructor

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CORECORE

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Ozone in the stratosphere Ozone in the stratosphere above the earth consists above the earth consists of;of;A: molecules containing 3 oxygen A: molecules containing 3 oxygen

atoms.atoms.

B: molecules of 2 oxygen atoms.B: molecules of 2 oxygen atoms.

C: radioactive particles.C: radioactive particles.

D: pollutants that have risen from D: pollutants that have risen from ground level.ground level.

Page 4: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which compounds have Which compounds have the highest ozone the highest ozone depletion potential depletion potential (ODP)? (ODP)? A: HCFCs.A: HCFCs.

B: HFCs.B: HFCs.

C: CFCs.C: CFCs.

D: All are equal.D: All are equal.

Page 5: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which atom of the CFC Which atom of the CFC molecule causes ozone molecule causes ozone depletion? depletion? A: Fluorine.A: Fluorine.

B: Chlorine.B: Chlorine.

C: Carbon.C: Carbon.

D: Hydrogen.D: Hydrogen.

Page 6: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

What characteristic(s) of CFCs make What characteristic(s) of CFCs make them more likely to reach the them more likely to reach the stratosphere than most other stratosphere than most other compounds containing chlorine?compounds containing chlorine?A: CFCs neither dissolve in water nor A: CFCs neither dissolve in water nor

break down into compounds that break down into compounds that dissolve in water, so they do not rain out dissolve in water, so they do not rain out of the atmosphere.of the atmosphere.

B: CFCs are lighter than other chlorine B: CFCs are lighter than other chlorine compounds, making it easier for them to compounds, making it easier for them to float upward when released.float upward when released.

C: CFCs are stored under pressure, C: CFCs are stored under pressure, causing them to jet upward when causing them to jet upward when released.released.

D: CFCs are attracted to ultraviolet D: CFCs are attracted to ultraviolet radiation.radiation.

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Each chlorine atom in the Each chlorine atom in the stratosphere can destroy ______ stratosphere can destroy ______ ozone molecules.ozone molecules.

A: 1 A: 1

B: 3B: 3

C: 100,000C: 100,000

D: Chlorine is not the element in D: Chlorine is not the element in refrigerant that harms ozone.refrigerant that harms ozone.

Page 8: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

HCFC refrigerants are;HCFC refrigerants are;

A: more harmful to stratospheric A: more harmful to stratospheric ozone than CFCs.ozone than CFCs.

B: as harmful to stratospheric ozone B: as harmful to stratospheric ozone as CFCs. as CFCs.

C: less harmful to stratospheric C: less harmful to stratospheric ozone than CFCs.ozone than CFCs.

D: not harmful to stratospheric D: not harmful to stratospheric ozone.ozone.

Page 9: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

What effects can ozone What effects can ozone depletion have on the depletion have on the environment?environment? A: Reduced crop yields.A: Reduced crop yields.

B: Reduced marine life.B: Reduced marine life.

C: Increased ground-level ozone.C: Increased ground-level ozone.

D: All of the above.D: All of the above.

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The Clean Air Act;The Clean Air Act;

A: calls for the phase out of A: calls for the phase out of CFC/HCFC production.CFC/HCFC production.

B: prohibits venting of CFC and HCFC B: prohibits venting of CFC and HCFC refrigerants and their substitutes.refrigerants and their substitutes.

C: requires EPA to set standards for C: requires EPA to set standards for recovery of refrigerants prior to recovery of refrigerants prior to appliance disposal.appliance disposal.

D: All of the above.D: All of the above.

Page 11: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

An award of up to what amount may be An award of up to what amount may be paid to a person supplying information paid to a person supplying information that that leads to a penalty against a leads to a penalty against a technician who is intentionally venting?technician who is intentionally venting?

A: $5,000.A: $5,000.

B: $10,000.B: $10,000.

C: $25,000.C: $25,000.

D: $50,000.D: $50,000.

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Before you dispose of any Before you dispose of any appliance containing a CFC or appliance containing a CFC or HCFC refrigerant, you must;HCFC refrigerant, you must;

A: recover the refrigerant.A: recover the refrigerant.

B: purge the appliance with B: purge the appliance with nitrogen.nitrogen.

C: flush the appliance with R-11.C: flush the appliance with R-11.

D: seal the appliance so no D: seal the appliance so no refrigerant can escaperefrigerant can escape

Page 13: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Service technicians who Service technicians who violate Clean Air Act violate Clean Air Act provisions:provisions:A: May be fined.A: May be fined.

B: May lose certification.B: May lose certification.

C: May be required to appear in C: May be required to appear in Federal court.Federal court.

D: All of the above.D: All of the above.

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Which of the following CFC or HCFC Which of the following CFC or HCFC refrigerant releases is considered a refrigerant releases is considered a violation of the prohibition on violation of the prohibition on venting?venting?A: Release of "de minimis" quantities in the course A: Release of "de minimis" quantities in the course

of making good faith attempts to recapture and of making good faith attempts to recapture and recycle or safely dispose of refrigerant. recycle or safely dispose of refrigerant.

B: Release of mixtures of nitrogen and refrigerant B: Release of mixtures of nitrogen and refrigerant that result from adding nitrogen to a fully that result from adding nitrogen to a fully charged appliance to leak-check the appliance.charged appliance to leak-check the appliance.

C: Refrigerants emitted in the course of normal C: Refrigerants emitted in the course of normal operation of an appliance.operation of an appliance.

D: Refrigerants emitted when connecting or D: Refrigerants emitted when connecting or disconnecting hoses to charge or service an disconnecting hoses to charge or service an appliance.appliance.

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Some state and local Some state and local governments may establish governments may establish laws that;laws that; A: follow the Clean Air Act/EPA A: follow the Clean Air Act/EPA

regulations.regulations.

B: are not as strict as the Clean Air B: are not as strict as the Clean Air Act/EPA regulations.Act/EPA regulations.

C: contain stricter regulations than C: contain stricter regulations than the Clean Air Act / EPA regulations.the Clean Air Act / EPA regulations.

D: Both "A" and "C".D: Both "A" and "C".

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Chlorofluorocarbons (CFCs) and Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) hydrochlorofluorocarbons (HCFCs) have which of the following in have which of the following in common?common?A: They have the same ozone A: They have the same ozone

depletion potential.depletion potential.

B: They both contain hydrogen.B: They both contain hydrogen.

C: They must be recovered before C: They must be recovered before opening or disposing of opening or disposing of appliances.appliances.

D: They have the same saturation D: They have the same saturation pressure at 70°F.pressure at 70°F.

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The oils that will be employed The oils that will be employed with most of the HFC-134a with most of the HFC-134a refrigeration applications are;refrigeration applications are;A: esters.A: esters.

B: alkylbenzenes.B: alkylbenzenes.

C: whale oils.C: whale oils.

D: All oils are compatible with HFC-D: All oils are compatible with HFC-134a.134a.

Page 18: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which of the following is an Which of the following is an approved "drop-in" service approved "drop-in" service replacement for R-12?replacement for R-12? A: HFC-134aA: HFC-134a

B: HFC-125B: HFC-125

C: CFC-502C: CFC-502

D: None of the above D: None of the above

Page 19: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Refrigerant entering the Refrigerant entering the compressor of a refrigeration compressor of a refrigeration system is a;system is a;A: liquidA: liquid

B: sub-cooled liquidB: sub-cooled liquid

C: sub-cooled vaporC: sub-cooled vapor

D: superheated vaporD: superheated vapor

Page 20: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Manufacturers often color code the Manufacturers often color code the exterior of gauges. On a typical gauge exterior of gauges. On a typical gauge manifold set, the high pressure gauge manifold set, the high pressure gauge is color coded;is color coded;A: greenA: green

B: yellowB: yellow

C: blueC: blue

D: redD: red

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Removing refrigerant in any condition Removing refrigerant in any condition from a system and storing it in an from a system and storing it in an external container without necessarily external container without necessarily testing or processing it in any way testing or processing it in any way defines;defines;A: recycling.A: recycling.

B: recovering.B: recovering.

C: reclaiming.C: reclaiming.

D: restoring.D: restoring.

Page 22: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

If a system will not hold a If a system will not hold a vacuum after it has been vacuum after it has been evacuated, then;evacuated, then;A: the system is ready to be A: the system is ready to be

charged.charged.

B: the system has been adequately B: the system has been adequately evacuated.evacuated.

C: the system may be leaking.C: the system may be leaking.

D: an expansion valve is clogged.D: an expansion valve is clogged.

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Long hoses between the unit Long hoses between the unit and the recovery machine and the recovery machine should be avoided as they should be avoided as they cause;cause;A: excessive pressure drop.A: excessive pressure drop.

B: increased recovery time.B: increased recovery time.

C: increased emissions.C: increased emissions.

D: All of the above.D: All of the above.

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The piping connection to The piping connection to the vacuum pump should the vacuum pump should be;be;A: as short in length and as large in A: as short in length and as large in

diameter as possible.diameter as possible.

B: suitably sized to connect to a B: suitably sized to connect to a gauge manifold.gauge manifold.

C: coiled and taped together.C: coiled and taped together.

D: colored red or blue to meet D: colored red or blue to meet codes.codes.

Page 25: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Why shouldn't technicians use Why shouldn't technicians use oxygen or compressed air to oxygen or compressed air to pressurize appliances to check for pressurize appliances to check for leaks?leaks?A: When mixed with compressor oil or A: When mixed with compressor oil or

some refrigerants, either oxygen or some refrigerants, either oxygen or compressed air can cause an explosion.compressed air can cause an explosion.

B: Leaking oxygen or compressed air is B: Leaking oxygen or compressed air is difficult to detect.difficult to detect.

C: The pressures produced by either C: The pressures produced by either oxygen or compressed air are not oxygen or compressed air are not acceptable.acceptable.

D: Neither oxygen nor compressed air D: Neither oxygen nor compressed air mix well with refrigerants.mix well with refrigerants.

Page 26: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Under what conditions Under what conditions may you use a disposable may you use a disposable cylinder to recover cylinder to recover refrigerant?refrigerant? A: When the system contains the A: When the system contains the

same refrigerant as the cylinder.same refrigerant as the cylinder.

B: When the system contains less B: When the system contains less than 10 lbs. of refrigerant.than 10 lbs. of refrigerant.

C: Only in an emergency.C: Only in an emergency.

D: Never.D: Never.

Page 27: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

How should refrigerant How should refrigerant cylinders be positioned cylinders be positioned when they are shipped?when they are shipped? A: Inverted.A: Inverted.

B: Upright.B: Upright.

C: Horizontally.C: Horizontally.

D: Stacked.D: Stacked.

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TYPE ITYPE I

Page 29: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

EPA regulations include which EPA regulations include which of the following in the of the following in the definition of a "small definition of a "small appliance"?appliance"?A: Products manufactured, charged A: Products manufactured, charged

and hermetically sealed in a and hermetically sealed in a factory.factory.

B: Products having 5 pounds or less B: Products having 5 pounds or less of refrigerant.of refrigerant.

C: Products with compressors under C: Products with compressors under 1/2 horsepower.1/2 horsepower.

D: Both "A" and "B". D: Both "A" and "B".

Page 30: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Recovery equipment used during Recovery equipment used during maintenance, service or repair of small maintenance, service or repair of small appliances must be certified by an EPA-appliances must be certified by an EPA-approved laboratory if manufactured approved laboratory if manufactured AFTER:AFTER:A: July 1, 1992.A: July 1, 1992.

B: July 1, 1993.B: July 1, 1993.

C: May 13, 1993.C: May 13, 1993.

D: November 15, 1993.D: November 15, 1993.

Page 31: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

The sale of CFC and The sale of CFC and HCFC refrigerants is; HCFC refrigerants is;

A: banned.A: banned.

B: limited by law to equipment B: limited by law to equipment owners.owners.

C: allowed only if there is proof of C: allowed only if there is proof of need.need.

D: restricted to technicians who are D: restricted to technicians who are EPA certified in refrigerant EPA certified in refrigerant recovery.recovery.

Page 32: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When servicing a small When servicing a small appliance for leak repair;appliance for leak repair;A: It is mandatory to repair the leak A: It is mandatory to repair the leak

within 30 days.within 30 days.B: It is mandatory to repair the leak B: It is mandatory to repair the leak

only when 35% of the charge only when 35% of the charge escapes within a 12 month period.escapes within a 12 month period.

C: It is not mandatory to repair the C: It is not mandatory to repair the leak but do so whenever possible.leak but do so whenever possible.

D: Both "A" and "B".D: Both "A" and "B".

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If EPA regulations change If EPA regulations change after a technician becomes after a technician becomes certified;certified; A: the technician certification is "grand A: the technician certification is "grand

fathered" for one year to allow time for fathered" for one year to allow time for

re-certification.re-certification.

B: it will be the technician's responsibility B: it will be the technician's responsibility to comply with any future changes in to comply with any future changes in the law.the law.

C: a new certification test must be taken C: a new certification test must be taken to be re-certified.to be re-certified.

D: Both "A" and "C".D: Both "A" and "C".

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EPA appliance sealed system with a non-EPA appliance sealed system with a non-operating compressor if technicians are operating compressor if technicians are using rules require capture of 80% of the using rules require capture of 80% of the refrigerant from a small;refrigerant from a small;

A: a system-dependent (passive) A: a system-dependent (passive) process.process.

B: a self-contained (active) process.B: a self-contained (active) process.

C: Either recovery process.C: Either recovery process.

D: Neither recovery process.D: Neither recovery process.

Page 35: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which of the following is Which of the following is NOT a Type I appliance?NOT a Type I appliance?

A: An MVAC-like system that holds A: An MVAC-like system that holds three pounds of R-12.three pounds of R-12.

B: A water cooler that holds 13 B: A water cooler that holds 13 ounces of R-12.ounces of R-12.

C: A food freezer that holds 22 C: A food freezer that holds 22 ounces of R-22.ounces of R-22.

D: A dehumidifier with seven D: A dehumidifier with seven ounces of R-500.ounces of R-500.

Page 36: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When checking for non-condensables inside a When checking for non-condensables inside a recovery cylinder, why should the technician recovery cylinder, why should the technician allow the temperature of the cylinder to allow the temperature of the cylinder to stabilize to room temperature before taking a stabilize to room temperature before taking a pressure reading?pressure reading?A: To prevent safety valves from purging A: To prevent safety valves from purging

refrigerant.refrigerant.B: It is a quick method of determining B: It is a quick method of determining

refrigerant level inside the tank.refrigerant level inside the tank.C: Comparisons to a pressure-C: Comparisons to a pressure-

temperature chart are only valid if temperature chart are only valid if both the pressure and temperature of both the pressure and temperature of the refrigerant are stable and known.the refrigerant are stable and known.

D: A temperature reading alone is D: A temperature reading alone is enough to determine refrigerant enough to determine refrigerant quality.quality.

Page 37: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When recovering refrigerant into a When recovering refrigerant into a non-pressurized container from a non-pressurized container from a refrigerator with an in operative refrigerator with an in operative compressor;compressor;A: it is necessary to heat the compressor A: it is necessary to heat the compressor

and strike it with a rubber mallet.and strike it with a rubber mallet.B: it is only necessary to recover as much B: it is only necessary to recover as much

refrigerant as will naturally flow out of refrigerant as will naturally flow out of the system.the system.

C: it is not necessary to recover since the C: it is not necessary to recover since the refrigerant is probably contaminated.refrigerant is probably contaminated.

D: it is necessary to chase refrigerant from D: it is necessary to chase refrigerant from the oil with pressurized dry nitrogen.the oil with pressurized dry nitrogen.

Page 38: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When installing any type of When installing any type of access fitting onto a sealed access fitting onto a sealed system;system;A: the fitting should be leak tested A: the fitting should be leak tested

before proceeding with recovery.before proceeding with recovery.B: it is not necessary to leak test an B: it is not necessary to leak test an

access fitting.access fitting.C: the fitting need not be leak tested C: the fitting need not be leak tested

until the total repair is completed.until the total repair is completed.D: the system must be pressurized with D: the system must be pressurized with

dry nitrogen before leak testing can bedry nitrogen before leak testing can beattempted.attempted.

Page 39: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When R-500 is recovered When R-500 is recovered from an appliance, it;from an appliance, it;A: can be mixed with either R-22 or R-12 A: can be mixed with either R-22 or R-12

during the recovery process, since R-500 during the recovery process, since R-500 is actually a mixture of the two is actually a mixture of the two refrigerants.refrigerants.

B: can be mixed with R-12 but not R-22 B: can be mixed with R-12 but not R-22 during the recovery process.during the recovery process.

C: need not be recovered since R-500 is not C: need not be recovered since R-500 is not one of the refrigerants covered by the one of the refrigerants covered by the Clean Air Act.Clean Air Act.

D: must be recovered into its own recovery D: must be recovered into its own recovery vessel that is clearly marked to ensure vessel that is clearly marked to ensure that mixing of refrigerants does not occur.that mixing of refrigerants does not occur.

Page 40: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

A standard vacuum pump A standard vacuum pump designed specifically for designed specifically for evacuation and dehydration evacuation and dehydration can;can;A: be used alone as a self-contained A: be used alone as a self-contained

(active) recovery device.(active) recovery device.

B: never be used as a recovery device in B: never be used as a recovery device in combination with a pressurized combination with a pressurized container.container.

C: be used alone as a substitute for any C: be used alone as a substitute for any recovery device.recovery device.

D: be used alone as a system-dependent D: be used alone as a system-dependent (passive) recovery device.(passive) recovery device.

Page 41: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Using the system-dependent (passive) Using the system-dependent (passive) recovery process, which condition recovery process, which condition requires the accessing both the high and requires the accessing both the high and low side of the system for refrigerant low side of the system for refrigerant recovery?recovery?A: When there is a leak in the A: When there is a leak in the

system.system.

B: When the compressor operates B: When the compressor operates normally.normally.

C: When the compressor only runs C: When the compressor only runs at half speed.at half speed.

D: When the compressor does not D: When the compressor does not run.run.

Page 42: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which of the following refrigerants must Which of the following refrigerants must be recovered with equipment currentlybe recovered with equipment currentlyregulated by the equipment certification regulated by the equipment certification requirements of the EPA under Section requirements of the EPA under Section 608?608?A: Sulfur dioxide.A: Sulfur dioxide.

B: Methyl chloride.B: Methyl chloride.

C: Methyl formate.C: Methyl formate.

D: R-12.D: R-12.

Page 43: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

The system-dependent The system-dependent (passive) recovery process for (passive) recovery process for small appliances;small appliances;A: never needs the use of a pump or A: never needs the use of a pump or

heat to recover refrigerant.heat to recover refrigerant.B: must use a pressure relief device B: must use a pressure relief device

when recovering refrigerant.when recovering refrigerant.C: captures refrigerant in a non-C: captures refrigerant in a non-

pressurized container. pressurized container. D: can only be performed on a D: can only be performed on a

system with an operating system with an operating compressor.compressor.

Page 44: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Before beginning a refrigerant Before beginning a refrigerant recovery procedure it is recovery procedure it is ALWAYS necessary to;ALWAYS necessary to;A: allow the appliance to stabilize A: allow the appliance to stabilize

at room temperature.at room temperature.B: know the type of refrigerant that B: know the type of refrigerant that

is in the system.is in the system.C: remove the appliance to an C: remove the appliance to an

outdoor location.outdoor location.D: disconnect the appliance from D: disconnect the appliance from

its power source.its power source.

Page 45: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

If a reclamation facility If a reclamation facility receives a tank of mixed receives a tank of mixed refrigerant, they may;refrigerant, they may;A: refuse to process the refrigerant A: refuse to process the refrigerant

and return it at the owner's expense.and return it at the owner's expense.

B: agree to destroy the refrigerant, B: agree to destroy the refrigerant, but typically a substantial fee is but typically a substantial fee is charged.charged.

C: resell the refrigerant for reuse in its C: resell the refrigerant for reuse in its current state.current state.

D: Both "A" and "B".D: Both "A" and "B".

Page 46: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

It is generally recommended that It is generally recommended that piercing-type valves be used on piercing-type valves be used on which of the which of the following tubing following tubing materials?materials?A: Copper.A: Copper.

B: Aluminum.B: Aluminum.

C: Steel.C: Steel.

D: Both "A" and "B".D: Both "A" and "B".

Page 47: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When filling a graduated When filling a graduated charging cylinder, refrigerant charging cylinder, refrigerant that is vented off the top of the that is vented off the top of the cylinder;cylinder;A: need not be recovered.A: need not be recovered.

B: must be recovered.B: must be recovered.

C: is considered a "de minimis" C: is considered a "de minimis" release.release.

D: None of the above.D: None of the above.

Page 48: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

A A storage cylinder of recovered R-22 at storage cylinder of recovered R-22 at normal room temperature (about 75 normal room temperature (about 75 degrees F), in the absence of non-degrees F), in the absence of non-condensables, will be pressurized to;condensables, will be pressurized to;

A: 250 psig.A: 250 psig.

B: 200 psig.B: 200 psig.

C: 175 psig.C: 175 psig.

D: 130 psig.D: 130 psig.

Page 49: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

A storage cylinder of recovered R-500 at A storage cylinder of recovered R-500 at normal room temperature (about 75 normal room temperature (about 75 degrees F), in the absence of nun-degrees F), in the absence of nun-condensables, will be pressurized to;condensables, will be pressurized to;

A: 30 psig.A: 30 psig.

B: 75 psig.B: 75 psig.

C: 95 psig.C: 95 psig.

D: 120 psig.D: 120 psig.

Page 50: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Refrigerants (i.e., R-12, R-22, R-Refrigerants (i.e., R-12, R-22, R-500, etc.) in large quantities 500, etc.) in large quantities can cause suffocation because;can cause suffocation because;A: they smell strong and make A: they smell strong and make

breathing difficult.breathing difficult.B: they are lighter than air and B: they are lighter than air and

cause dizziness.cause dizziness.C: they are heavier than air and C: they are heavier than air and

displace oxygen.displace oxygen.D: they sting the nose and cause D: they sting the nose and cause

sneezing.sneezing.

Page 51: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

At high temperatures, (i.e., open At high temperatures, (i.e., open flames, glowing metal surfaces, flames, glowing metal surfaces, etc.) R-12 and R-22 can decompose etc.) R-12 and R-22 can decompose to form;to form;A: hydrozine gas.A: hydrozine gas.

B: phosgene gas.B: phosgene gas.

C: helium gas.C: helium gas.

D: None of the above.D: None of the above.

Page 52: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Portable refillable tanks or Portable refillable tanks or containers used to ship CFC or HCFC containers used to ship CFC or HCFC refrigerants obtained with recovery refrigerants obtained with recovery equipment must Meet what equipment must Meet what standard (s)?standard (s)? A: Department of Transportation.A: Department of Transportation.

B: Community Right-To-Know Act.B: Community Right-To-Know Act.

C: Underwriters Laboratories.C: Underwriters Laboratories.

D: All of the above.D: All of the above.

Page 53: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

If a large leak of refrigerant occurs such If a large leak of refrigerant occurs such as from a filled cylinder in an enclosed as from a filled cylinder in an enclosed area, what action should be taken when area, what action should be taken when no self-contained breathing apparatus is no self-contained breathing apparatus is available?available?A: Use butyl lined gloves and try to A: Use butyl lined gloves and try to

stop the leak.stop the leak.

B: Use a leak detector to locate the B: Use a leak detector to locate the leak and try to stop the leak.leak and try to stop the leak.

C: Vacate and ventilate the spill C: Vacate and ventilate the spill area.area.

D: All of the above.D: All of the above.

Page 54: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

TYPE IITYPE II

Page 55: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

After installation of a field-piped After installation of a field-piped split system, the unit should split system, the unit should first be;first be;

A: evacuated.A: evacuated.

B: pressurized with R-22/leak B: pressurized with R-22/leak checked.checked.

C: pressurized with R-12/leak C: pressurized with R-12/leak checked.checked.

D: pressurized with nitrogen/leak D: pressurized with nitrogen/leak checked.checked.

Page 56: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Many refrigeration units use an Many refrigeration units use an open compressor. Which part of the open compressor. Which part of the compressor is compressor is most likely to leak most likely to leak if a unit is not used for several if a unit is not used for several months? months? A: The suction service valve.A: The suction service valve.

B: The rotating shaft seal.B: The rotating shaft seal.

C: The oil drain plug.C: The oil drain plug.

D: The discharge service valve.D: The discharge service valve.

Page 57: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

EPA regulations require that all appliances EPA regulations require that all appliances containing more than 50 pounds of refrigerant containing more than 50 pounds of refrigerant (except for commercial and industrial process (except for commercial and industrial process refrigeration) be repaired when the leak rate refrigeration) be repaired when the leak rate exceeds ____ percent of the charge per year. exceeds ____ percent of the charge per year.

A: 0A: 0

B: 15 B: 15

C: 25C: 25

D: 35D: 35

Page 58: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

EPA regulations require that leaking EPA regulations require that leaking commercial and industrial process commercial and industrial process refrigeration be repaired when the leak refrigeration be repaired when the leak rate exceeds ____ percent of the charge rate exceeds ____ percent of the charge per year. per year.

A: 0 A: 0

B: 15 B: 15

C: 25C: 25

D: 35 D: 35

Page 59: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Refrigerant has been recovered from an Refrigerant has been recovered from an air-conditioning system and held in a air-conditioning system and held in a refillable cylinder, in order to replace the refillable cylinder, in order to replace the condenser coil. The refrigerant;condenser coil. The refrigerant;

A: can probably be charged back into A: can probably be charged back into the system. the system.

B: should probably be replaced with B: should probably be replaced with R-123.R-123.

C: must be reclaimed.C: must be reclaimed.

D: must be destroyed. D: must be destroyed.

Page 60: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Your recovery/recycling machine has R-502 Your recovery/recycling machine has R-502 refrigerant in it. You now have to recover refrigerant in it. You now have to recover refrigerant from a unit with R-22. What must refrigerant from a unit with R-22. What must be done before the R-22 refrigerant can be be done before the R-22 refrigerant can be recovered/recycled?recovered/recycled?

A: Nothing, as long as the recovery A: Nothing, as long as the recovery machine is not full.machine is not full.

B: Change the expansion valve on the B: Change the expansion valve on the recovery machine.recovery machine.

C: Change the filter and expansion valve C: Change the filter and expansion valve on the recovery machine.on the recovery machine.

D: Recover as much of the R-502 from D: Recover as much of the R-502 from the recovery unit as possible, change the recovery unit as possible, change filter, and evacuate. filter, and evacuate.

Page 61: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Recycling or recovery equipment using Recycling or recovery equipment using hermetic compressors has the potential to hermetic compressors has the potential to overheat when drawing deep vacuums overheat when drawing deep vacuums because;because;

A: it runs faster than other equipment.A: it runs faster than other equipment.

B: the motor relies on the flow of B: the motor relies on the flow of refrigerant through the compressor for refrigerant through the compressor for cooling.cooling.

C: it has a higher compression ratio limit C: it has a higher compression ratio limit than other equipment.than other equipment.

D: the oils used in hermetic compressors D: the oils used in hermetic compressors burn at lower temperatures than the burn at lower temperatures than the oils used in other equipment.oils used in other equipment.

Page 62: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Refrigerant should be Refrigerant should be removed from the removed from the condenser outlet when;condenser outlet when; A: the condenser is below the A: the condenser is below the

receiver.receiver.

B: the condenser is on the roof.B: the condenser is on the roof.

C: the compressor is inoperative.C: the compressor is inoperative.

D: the evaporator has a small leak. D: the evaporator has a small leak.

Page 63: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

With an air-cooled condenser on the With an air-cooled condenser on the roof of a building and the roof of a building and the evaporator on the first floor, evaporator on the first floor, recovery should first occur;recovery should first occur;

A: from the vapor line entering the A: from the vapor line entering the condenser.condenser.

B: from the discharge of the B: from the discharge of the compressor.compressor.

C: from the liquid line entering the C: from the liquid line entering the evaporator.evaporator.

D: on the suction side of the D: on the suction side of the compressor. compressor.

Page 64: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Recovering refrigerant from Recovering refrigerant from a system in vapor phase will a system in vapor phase will minimize loss of;minimize loss of; A: water.A: water.

B: oil.B: oil.

C: refrigerant.C: refrigerant.

D: All of the above.D: All of the above.

Page 65: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Before using a recovery unit to Before using a recovery unit to remove a charge, what steps remove a charge, what steps should be taken?should be taken?

A: Check service valve positions.A: Check service valve positions.

B: Check recovery unit oil level.B: Check recovery unit oil level.

C: Evacuate recovery unit / C: Evacuate recovery unit / receiver.receiver.

D: All of the above.D: All of the above.

Page 66: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

You can save time recovering the You can save time recovering the refrigerant from a system by refrigerant from a system by removing as much as possible in the removing as much as possible in the ____ phase? ____ phase?

A: finalA: final

B: initialB: initial

C: liquidC: liquid

D: vaporD: vapor

Page 67: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which of the following repairs Which of the following repairs would ALWAYS be considered would ALWAYS be considered "major" under EPA's regulations? "major" under EPA's regulations?

A: Replacement of an evaporator A: Replacement of an evaporator coil.coil.

B: Replacement of a filter-drier.B: Replacement of a filter-drier.

C: Replacement of a schraeder valve C: Replacement of a schraeder valve core.core.

D: Replacement of a condenser fan D: Replacement of a condenser fan motor. motor.

Page 68: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Appliances containing CFC Appliances containing CFC refrigerants can be evacuated refrigerants can be evacuated to atmospheric pressure when;to atmospheric pressure when;

A: the repair is major.A: the repair is major.

B: the repair is followed by an B: the repair is followed by an evacuation of the appliance to the evacuation of the appliance to the environment.environment.

C: leaks in the appliance make C: leaks in the appliance make evacuation to the prescribed level evacuation to the prescribed level unattainable.unattainable.

D: the appliance is being disposed.D: the appliance is being disposed.

Page 69: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

You are changing out the compressor of a system You are changing out the compressor of a system containing 40 pounds R-502. Your recycling containing 40 pounds R-502. Your recycling equipment was manufactured AFTER November equipment was manufactured AFTER November 15, 1993. In addition to isolating the compressor 15, 1993. In addition to isolating the compressor as much as possible, which of the following as much as possible, which of the following procedures should you follow? procedures should you follow?

A: A: Simply remove the compressor. Simply remove the compressor. B: Evacuate the isolated section of the system B: Evacuate the isolated section of the system

to atmospheric pressure, then remove the to atmospheric pressure, then remove the compressor. compressor.

C: Evacuate the isolated section of the system C: Evacuate the isolated section of the system to 10 inches of vacuum and hold. If system to 10 inches of vacuum and hold. If system pressure does not rise, remove the pressure does not rise, remove the compressor.compressor.

D: Evacuate the isolated section of the system D: Evacuate the isolated section of the system to 15 inches of vacuum and to 15 inches of vacuum and hold. If system hold. If system pressure does not rise, remove the pressure does not rise, remove the compressor. compressor.

Page 70: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which of the following statements is NOT Which of the following statements is NOT true of recycling and recovery equipment true of recycling and recovery equipment manufactured AFTER November 15, 1993? manufactured AFTER November 15, 1993?

A: It must be tested by an EPA-approved A: It must be tested by an EPA-approved third party.third party.

B: It must meet vacuum standards more B: It must meet vacuum standards more stringent than those met by equipment stringent than those met by equipment manufactured BEFORE November 15, manufactured BEFORE November 15, 1993.1993.

C: It must be equipped with low-loss C: It must be equipped with low-loss fittings.fittings.

D: It must have an oil separator. D: It must have an oil separator.

Page 71: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When using recovery and recycling equipment When using recovery and recycling equipment manufactured BEFORE November 15, 1993, manufactured BEFORE November 15, 1993, technicians must evacuate an appliance technicians must evacuate an appliance containing 10 pounds of CFC-500 to the following containing 10 pounds of CFC-500 to the following level before disposing of the appliance:level before disposing of the appliance:

A: 0 psig.A: 0 psig.

B: 4 inches of Hg vacuum.B: 4 inches of Hg vacuum.

C: 10 inches of Hg vacuum.C: 10 inches of Hg vacuum.

D: 15 inches of Hg vacuum.D: 15 inches of Hg vacuum.

Page 72: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When using recovery and recycling equipment When using recovery and recycling equipment manufactured AFTER November 15, 1993, manufactured AFTER November 15, 1993, technicians must evacuate an appliance technicians must evacuate an appliance component containing MORE than 200 pounds of component containing MORE than 200 pounds of CFC-12 to the following level before making a CFC-12 to the following level before making a major repair:major repair:

A: 0 psig.A: 0 psig.

B: 4 inches of Hg vacuum.B: 4 inches of Hg vacuum.

C: 10 inches of Hg vacuum.C: 10 inches of Hg vacuum.

D: 15 inches of Hg vacuum.D: 15 inches of Hg vacuum.

Page 73: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

After reaching the required After reaching the required recovery vacuum on an recovery vacuum on an

appliance, you should;appliance, you should; A: immediately disconnect the recycling or A: immediately disconnect the recycling or

recovery equipment and open the recovery equipment and open the system for service.system for service.

B: wait for at least a few minutes to see if B: wait for at least a few minutes to see if the system pressure rises, indicating that the system pressure rises, indicating that there is still refrigerant in liquid form or there is still refrigerant in liquid form or in the oil.in the oil.

C: immediately break the vacuum with C: immediately break the vacuum with nitrogen and open the system for nitrogen and open the system for service.service.

D: immediately pressurize the system with D: immediately pressurize the system with nitrogen and perform a leak check. nitrogen and perform a leak check.

Page 74: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

If a system is opened for If a system is opened for servicing, which of the servicing, which of the following should be following should be replaced?replaced? A: Filter drier.A: Filter drier.

B: Thermostat. B: Thermostat.

C: Metering device.C: Metering device.

D: Crankcase heater. D: Crankcase heater.

Page 75: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

The state of the refrigerant The state of the refrigerant leaving the receiver of a leaving the receiver of a refrigeration system is;refrigeration system is;

A: low pressure liquid.A: low pressure liquid.

B: low pressure vapor.B: low pressure vapor.

C: high pressure liquid.C: high pressure liquid.

D: high pressure vapor.D: high pressure vapor.

Page 76: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When evacuating a vapor When evacuating a vapor compression system, the vacuum compression system, the vacuum pump should be capable of pulling a pump should be capable of pulling a

vacuum of;vacuum of; A: 2 mm Hg.A: 2 mm Hg.

B: 1 mm Hg.B: 1 mm Hg.

C: 1000 microns.C: 1000 microns.

D: 500 microns. D: 500 microns.

Page 77: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Refrigerant cannot be Refrigerant cannot be recovered without isolating a recovered without isolating a parallel compressor system parallel compressor system

because of;because of; A: the service valve connection. A: the service valve connection.

B: the electrical connections.B: the electrical connections.

C: an open equalization C: an open equalization connection.connection.

D: the thermal bleed connection.D: the thermal bleed connection.

Page 78: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Every refrigerating Every refrigerating system shall be system shall be protected by; protected by; A: a pressure relief device.A: a pressure relief device.

B: a properly located stop valve.B: a properly located stop valve.

C: a low pressure control.C: a low pressure control.

D: a refrigerant receiver.D: a refrigerant receiver.

Page 79: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

For what refrigerant (s) is an For what refrigerant (s) is an equipment room refrigerant monitor equipment room refrigerant monitor required under ASHRAE Standard required under ASHRAE Standard

15?15? A: R-12.A: R-12.

B: R-134a.B: R-134a.

C: R-11.C: R-11.

D: All of the above D: All of the above

Page 80: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

TYPE IIITYPE III

Page 81: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Charged low pressure Charged low pressure refrigeration machines may be refrigeration machines may be most efficiently leak checked most efficiently leak checked by;by;A: adding dry nitrogen.A: adding dry nitrogen.

B: adding HCFC-22.B: adding HCFC-22.

C: raising system pressure by C: raising system pressure by heating with circulated hot water heating with circulated hot water or heating blankets.or heating blankets.

D: operating the purge system.D: operating the purge system.

Page 82: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

A hydrostatic tube test kit A hydrostatic tube test kit will;will;

A: determine if a tube leaks.A: determine if a tube leaks.

B: blow all water out of tubes.B: blow all water out of tubes.

C: remove water from a machine.C: remove water from a machine.

D: vent refrigerant to the D: vent refrigerant to the atmosphere.atmosphere.

Page 83: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Where would you place a leak Where would you place a leak detector probe to check gas leaks detector probe to check gas leaks into the water box with water into the water box with water removed?removed?A: At the rupture disc. A: At the rupture disc.

B: Through the vent valve. B: Through the vent valve.

C: Through a test plug. C: Through a test plug.

D: Through a drain valve.D: Through a drain valve.

Page 84: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

EPA regulations require that leaking EPA regulations require that leaking commercial and industrial process commercial and industrial process refrigeration be repaired when the leak refrigeration be repaired when the leak rate exceeds ____ percent of the charge rate exceeds ____ percent of the charge per year.per year.A: 0 A: 0

B: 15 B: 15

C: 25 C: 25

D: 35D: 35

Page 85: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

EPA regulations require that all appliances EPA regulations require that all appliances containing more than 50 pounds of refrigerant containing more than 50 pounds of refrigerant (except for commercial and industrial process (except for commercial and industrial process refrigeration) be repaired when the leak rate refrigeration) be repaired when the leak rate exceeds ____ percent of the charge per year.exceeds ____ percent of the charge per year.

A: 0 A: 0

B: 15B: 15

C: 25C: 25

D: 35D: 35

Page 86: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

R-11 or R-123 system R-11 or R-123 system refrigerant removal starts refrigerant removal starts with;with; A: vapor removal.A: vapor removal.

B: liquid removal.B: liquid removal.

C: vapor & liquid removal.C: vapor & liquid removal.

D: oil separation.D: oil separation.

Page 87: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

With a low-pressure chiller, With a low-pressure chiller, what must you do after what must you do after recovering the liquid recovering the liquid refrigerant?refrigerant?A: Recover the vapor refrigerant. A: Recover the vapor refrigerant.

B: Pressurize system with B: Pressurize system with nitrogen.nitrogen.

C: Remove the oil from the C: Remove the oil from the system.system.

D: Solvent-flush entire system.D: Solvent-flush entire system.

Page 88: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When leak testing a low When leak testing a low pressure centrifugal with pressure centrifugal with nitrogen, what is the maximum nitrogen, what is the maximum test pressure?test pressure?A: 0 psig. A: 0 psig.

B: 10 psig. B: 10 psig.

C: 25 psig. C: 25 psig.

D: 50 psig.D: 50 psig.

Page 89: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

A typical setting for the high pressure A typical setting for the high pressure cut-out control on a recovery unit used cut-out control on a recovery unit used for evacuating the refrigerant from a low for evacuating the refrigerant from a low pressure chiller is;pressure chiller is;

A: 2 psig. A: 2 psig.

B: 5 psig.B: 5 psig.

C: 10 psig.C: 10 psig.

D: 15 psig.D: 15 psig.

Page 90: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When removing oil from a low When removing oil from a low pressure system, the pressure system, the temperature should be 130°F temperature should be 130°F

because;because; A: you can warm your hands on the A: you can warm your hands on the

container.container.

B: less refrigerant will be contained in B: less refrigerant will be contained in the oil at the higher temperaturethe oil at the higher temperature

C: warmer oil has a lower . viscosity C: warmer oil has a lower . viscosity and flows more easily.and flows more easily.

D: it shows that the heater is working.D: it shows that the heater is working.

Page 91: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

According to ASHRAE Guideline 3-1996, if According to ASHRAE Guideline 3-1996, if the pressure in a system rises from 1 mm the pressure in a system rises from 1 mm Hg to a level above __ during a standing Hg to a level above __ during a standing vacuum test, the system should be vacuum test, the system should be checked for leaks.checked for leaks.

A: 1.5 mm Hg.A: 1.5 mm Hg.

B: 2.0 mm Hg.B: 2.0 mm Hg.

C: 2.5 mm Hg.C: 2.5 mm Hg.

D: 3.0 mm Hg. D: 3.0 mm Hg.

Page 92: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

How do you determine when enough How do you determine when enough vapor has entered the refrigeration vapor has entered the refrigeration system before you charge system before you charge refrigerant liquid?refrigerant liquid?

A: Refrigerant saturation A: Refrigerant saturation temperature increases to 36 temperature increases to 36 degrees F.degrees F.

B: Recovery unit liquid level drops.B: Recovery unit liquid level drops.

C: Vapor charge for 15 minutes.C: Vapor charge for 15 minutes.

D: Recovery unit pressure drops. D: Recovery unit pressure drops.

Page 93: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

After system servicing, why is After system servicing, why is refrigerant vapor re-introduced to refrigerant vapor re-introduced to the refrigeration system before the refrigeration system before refrigerant liquid?refrigerant liquid?A: Vapor charging increases pressure A: Vapor charging increases pressure

slowly, preventing failure of the slowly, preventing failure of the rupture disk.rupture disk.

B: Vapor charging is faster than liquid B: Vapor charging is faster than liquid charging.charging.

C: Liquid charging is more difficult to C: Liquid charging is more difficult to control than vapor charging.control than vapor charging.

D: Liquid charged into a deep vacuum D: Liquid charged into a deep vacuum will boil and may lower temperatures will boil and may lower temperatures enough to freeze water in the tubes.enough to freeze water in the tubes.

Page 94: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When using recovery or recycling When using recovery or recycling equipment manufactured BEFORE equipment manufactured BEFORE November 15, 1993, technicians must November 15, 1993, technicians must evacuate low-pressure appliances to the evacuate low-pressure appliances to the following level before making a major following level before making a major repair:repair:

A: 0 psig.A: 0 psig.

B: 15 inches of Hg vacuum.B: 15 inches of Hg vacuum.

C: 25 inches of Hg vacuum.C: 25 inches of Hg vacuum.

D: 25 mm of Hg absolute.D: 25 mm of Hg absolute.

Page 95: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Appliances need not be Appliances need not be evacuated all the way to the evacuated all the way to the

prescribed level when;prescribed level when; A: the repair is major.A: the repair is major.B: the repair is followed by an B: the repair is followed by an

evacuation of the appliance to the evacuation of the appliance to the environment.environment.

C: leaks in the appliance make C: leaks in the appliance make evacuation to the prescribed level evacuation to the prescribed level unattainable.unattainable.

D: the appliance is being disposed.D: the appliance is being disposed.

Page 96: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

After reaching the required After reaching the required recovery vacuum on an recovery vacuum on an

appliance, you should;appliance, you should; A: immediately disconnect the recycling or A: immediately disconnect the recycling or

recovery equipment and open the recovery equipment and open the system for service.system for service.

B: wait for at least a few minutes to see if B: wait for at least a few minutes to see if the system pressure rises, indicating that the system pressure rises, indicating that there is still refrigerant in liquid form or there is still refrigerant in liquid form or in the oil.in the oil.

C: immediately break the vacuum with C: immediately break the vacuum with nitrogen and open the system for nitrogen and open the system for service.service.

D: immediately pressurize the system with D: immediately pressurize the system with nitrogen and perform a leak check. nitrogen and perform a leak check.

Page 97: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which of the following repairs Which of the following repairs would ALWAYS be considered would ALWAYS be considered "major" under EPA's "major" under EPA's

regulations?regulations? A: Replacement of an evaporator A: Replacement of an evaporator

coil. coil.

B: Replacement of a filter-drier.B: Replacement of a filter-drier.

C: Replacement of a switch.C: Replacement of a switch.

D: Replacement of a purge unit. D: Replacement of a purge unit.

Page 98: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

When using recovery and recycling When using recovery and recycling equipment manufactured AFTER November equipment manufactured AFTER November 15, 1993, technicians must evacuate low-15, 1993, technicians must evacuate low-pressure appliances to the following level pressure appliances to the following level before disposing of the appliance:before disposing of the appliance:

A: 0 psig.A: 0 psig.

B: 15 inches of Hg vacuum.B: 15 inches of Hg vacuum.

C: 25 inches of Hg vacuum.C: 25 inches of Hg vacuum.

D: 25 mm of Hg absolute.D: 25 mm of Hg absolute.

Page 99: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Under EPA's regulations, which of the following Under EPA's regulations, which of the following methods can be used to pressurize an R-11 or methods can be used to pressurize an R-11 or R-123 system for the purpose of opening the R-123 system for the purpose of opening the system for a non-major repair?system for a non-major repair?

A: Adding nitrogen.A: Adding nitrogen.

B: Warming the refrigerantB: Warming the refrigerant

C: Adding compressed air.C: Adding compressed air.

D: Adding carbon dioxide. D: Adding carbon dioxide.

Page 100: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Refrigerant-11 at a pressure Refrigerant-11 at a pressure of 18.1 inches Hg vacuum has of 18.1 inches Hg vacuum has a saturation temperature of;a saturation temperature of; A: 28 degrees F.A: 28 degrees F.

B: 32 degrees F.B: 32 degrees F.

C: 36 degrees F.C: 36 degrees F.

D: 40 degrees F. D: 40 degrees F.

Page 101: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

The PRIMARY purpose of a The PRIMARY purpose of a purge unit on a CFC-11 purge unit on a CFC-11 chiller is to;chiller is to; A: remove CFCs from the system.A: remove CFCs from the system.

B: condense air out of the system.B: condense air out of the system.

C: condense water out of the C: condense water out of the system.system.

D: remove non-condensables from D: remove non-condensables from the system.the system.

Page 102: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

On a centrifugal system, the On a centrifugal system, the purge unit takes its suction purge unit takes its suction from the;from the; A: top of the condenser.A: top of the condenser.

B: compressor oil sump.B: compressor oil sump.

C: top of the evaporator.C: top of the evaporator.

D: suction elbow.D: suction elbow.

Page 103: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Refrigerant is added to a Refrigerant is added to a centrifugal machine through centrifugal machine through the;the;

A: float valve.A: float valve.

B: compressor service valve.B: compressor service valve.

C: condenser charging valve.C: condenser charging valve.

D: evaporator charging valve. D: evaporator charging valve.

Page 104: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Under what code group of Under what code group of ASHRAE Standard 34 does ASHRAE Standard 34 does R-123 fall?R-123 fall? A: Al A: Al

B: A2B: A2

C: BlC: Bl

D: B2 D: B2

Page 105: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

Which of the following safety Which of the following safety precautions should be adhered precautions should be adhered to for low pressure systems?to for low pressure systems?

A: Do not siphon refrigerant by A: Do not siphon refrigerant by mouth.mouth.

B: Avoid spilling liquid refrigerant B: Avoid spilling liquid refrigerant on the skin.on the skin.

C: Use gloves and safety goggles C: Use gloves and safety goggles when working with liquid when working with liquid refrigerant.refrigerant.

D: All of the above.D: All of the above.

Page 106: Section 608 Certification Pre-Test Mr. Morgan HVAC/R Instructor.

THE END!!!!THE END!!!!