Section 608 Certification Pre-Test

11

Section 608 Certification Section 608 Certification Pre-TestPre-Test

Mr. MorganMr. Morgan

HVAC/R Instructor HVAC/R Instructor

22

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 nitrogen.B: purge the appliance with nitrogen.

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

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

33

HCFC refrigerants are;HCFC refrigerants are;

A: A: more harmful to stratospheric 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.

44

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 leads to a penalty against a that 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.

55

Ozone in the stratosphere above Ozone in the stratosphere above the earth consists of;the earth consists 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.

66

Which compounds have the highest Which compounds have the highest ozone depletion potential (ODP)?ozone depletion potential (ODP)?

A: HCFCs.A: HCFCs.

B: HFCs.B: HFCs.

C: CFCs.C: CFCs.

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

77

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

A: 1A: 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.

88

Service technicians who violate Service technicians who violate Clean Air Act provisions: Clean Air Act 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.

99

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.


1010

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 venting?violation of the prohibition on 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.

1111

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 stratosphere than most other than most other compounds containing chlorine?compounds containing chlorine?

A: CFCs neither dissolve in water nor break A: CFCs neither dissolve in water nor break down into compounds that dissolve in water, down into compounds that dissolve in water, so they do not rain out of the atmosphere.so they do not rain out 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, causing C: CFCs are stored under pressure, causing them to jet upward when released.them to jet upward when released.

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

1212

The Clean Air Act; The Clean Air Act;

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


1313

Which atom of the CFC molecule Which atom of the CFC molecule causes ozone depletion?causes ozone depletion?

A: Fluorine.A: Fluorine.

B: Chlorine.B: Chlorine.

C: Carbon.C: Carbon.

D: Hydrogen.D: Hydrogen.

1414

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

A: green.A: green.

B: yellow.B: yellow.

C: blue.C: blue.

D: red.D: red.

1515

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 charged.A: the system is ready to be 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.

1616

The piping connection to the The piping connection to the vacuum pump should be; vacuum pump should 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.

1717

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

1818

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-134a.A: HFC-134a.

B: HFC-125.B: HFC-125.

C: CFC-502.C: CFC-502.

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

1919

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".

2020

How should refrigerant How should refrigerant cylinders be positioned when cylinders be positioned when they are shipped? they are shipped?

A: Inverted.A: Inverted.

B: Upright.B: Upright.

C: Horizontally.C: Horizontally.

D: Stacked. D: Stacked.

2121

Chlorofluorocarbons (CFCs) and Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have hydrochlorofluorocarbons (HCFCs) have which of the following in common?which of the following in 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 appliances.opening or disposing of appliances.

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

2222

Under what conditions may you use Under what conditions may you use a disposable cylinder to recover a disposable cylinder to recover refrigerant? refrigerant?

A: When the system contains the A: When the system contains the same refrigerant as the same refrigerant as the cylinder.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.

2323

Why shouldn't technicians use Why shouldn't technicians use oxygen or compressed air to oxygen or compressed air to pressurize appliances pressurize appliances to check for to check for leaks? leaks?

A: When mixed with compressor oil or some A: When mixed with compressor oil or some refrigerants, either oxygen or compressed refrigerants, either oxygen or compressed air can cause an explosion.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 oxygen C: The pressures produced by either oxygen or compressed air are not acceptable.or compressed air are not acceptable.

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

2424

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

2525

Long hoses between the unit and Long hoses between the unit and the recovery machine should be the recovery machine should be avoided as they 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.

2626

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.

2727

TYPE ITYPE I

2828

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 system.A: When there is a leak in the system.

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

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

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

2929

When R-500 is recovered from When R-500 is recovered from an appliance, it; 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 is during the recovery process, since R-500 is actually a mixture of the two refrigerants.actually a mixture of the two 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 that vessel that is clearly marked to ensure that mixing of refrigerants does not occur.mixing of refrigerants does not occur.

3030

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

3131

When checking for non-condensables When checking for non-condensables inside a recovery cylinder, why should the inside a recovery cylinder, why should the technician allow the temperature of the technician allow the temperature of the cylinder to stabilize to room temperature cylinder to stabilize to room temperature before taking a pressure reading?before taking a 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-temperature C: Comparisons to a pressure-temperature chart are only valid if both the pressure chart are only valid if both the pressure and temperature of the refrigerant are and temperature of the refrigerant are stable and known.stable and known.

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

3232

A standard vacuum pump designed A standard vacuum pump designed specifically for evacuation and specifically for evacuation and dehydration can;dehydration 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 container.combination with a pressurized 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.

3333

When servicing a small appliance When servicing a small appliance for leak repair;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 leak C: It is not mandatory to repair the leak but do so whenever possible.but do so whenever possible.

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

3434

When recovering refrigerant into a non-When recovering refrigerant into a non-pressurized container from a refrigerator pressurized container from a refrigerator with an in operative compressor;with an in operative 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.

3535

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

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.

3636

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 be dry nitrogen before leak testing can be attempted.attempted.

3737

Which of the following is NOT a Which of the following is NOT a Type I appliance? 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 ounces C: A food freezer that holds 22 ounces of R-22.of R-22.

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

3838

EPA regulations include which of the EPA regulations include which of the following in the definition of a following in the definition of a "small appliance"? "small appliance"?

A: Products manufactured, charged A: Products manufactured, charged and hermetically sealed in a factory.and hermetically sealed in a factory.

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

3939

If EPA regulations change after If EPA regulations change after a technician becomes certified; a technician becomes certified;

A: the technician certification is A: the technician certification is "grand fathered" for one year to "grand fathered" for one year to allow time for re-certification.allow time for re-certification.

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

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

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

4040

The sale of CFC and HCFC The sale of CFC and HCFC refrigerants is 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 PA certified in refrigerant recovery.PA certified in refrigerant recovery.

4141

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

4242

Before beginning a refrigerant Before beginning a refrigerant recovery procedure it is ALWAYS recovery procedure it is ALWAYS necessary to; necessary to;

A: allow the appliance to stabilize at A: allow the appliance to stabilize at room temperature.room temperature.

B: know the type of refrigerant that is B: know the type of refrigerant that is in the system.in the system.

C: remove the appliance to an C: remove the appliance to an outdoor location.outdoor location.

D: disconnect the appliance from its D: disconnect the appliance from its power source.power source.

4343

The system-dependent (passive) The system-dependent (passive) recovery process for small recovery process for small appliances;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 system D: can only be performed on a system with an operating compressor. with an operating compressor.

4444

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: CopperA: Copper

B: AluminumB: Aluminum

C: SteelC: Steel

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

4545

If a reclamation facility receives a If a reclamation facility receives a tank of mixed refrigerant, they may; tank of mixed refrigerant, they may;

A: refuse to process the refrigerant and A: refuse to process the refrigerant and return it at the owner's expense.return it at the owner's expense.

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

4646

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 area.C: Vacate and ventilate the spill area.


4747

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





4848

When a household refrigerator compressor When a household refrigerator compressor does not run, it is recommended that low does not run, it is recommended that low and high side access valves be installed and high side access valves be installed when recovering refrigerant from the when recovering refrigerant from the system because;system because;

A: it can enhance the speed of A: it can enhance the speed of recovery.recovery.

B: it may be necessary to achieve B: it may be necessary to achieve required recovery efficiency.required recovery efficiency.

C: otherwise, the refrigerator's C: otherwise, the refrigerator's compressor may be damaged.compressor may be damaged.

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

4949

Refrigerants (i.e., R-12, R-22, R-500, Refrigerants (i.e., R-12, R-22, R-500, etc.) in large quantities can cause etc.) in large quantities can cause suffocation because; 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 cause B: they are lighter than air and cause dizziness.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.

5050

Portable refillable tanks or containers used to Portable refillable tanks or containers used to ship CFC or HCFC refrigerants obtained with ship CFC or HCFC refrigerants obtained with recovery equipment must meet what standard recovery equipment must meet what standard (s)?(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.


5151

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.


5252

When filling a graduated charging When filling a graduated charging cylinder, refrigerant that is vented cylinder, refrigerant that is vented off the top of the cylinder; off the top of the 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.


5353

TYPE IITYPE II

5454

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 be refrigerant from a unit with R-22. What must be done before the R-22 refrigerant can 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 C: Change the filter and expansion valve on the recovery machine.valve 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, the recovery unit as possible, change filter, and evacuate. change filter, and evacuate.

5555

Recycling or recovery equipment Recycling or recovery equipment using hermetic compressors has the using hermetic compressors has the potential to overheat when drawing potential to overheat when drawing deep vacuums because; deep vacuums 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 D: the oils used in hermetic compressors burn at lower compressors burn at lower temperatures than the oils used in temperatures than the oils used in other equipment.other equipment.

5656

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

5757

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

5858

Refrigerant should be removed Refrigerant should be removed from the condenser outlet from the condenser outlet when; 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.

5959

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

6060

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: 15B: 15

C: 25C: 25

D: 35D: 35

6161

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.

6262

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

A: Simply remove the compressor.A: 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 hold. If system to 15 inches of vacuum and hold. If system pressure does not rise, remove the pressure does not rise, remove the compressor.compressor.

6363

If a system is opened for servicing, If a system is opened for servicing, which of the following should be which of the 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.

6464

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:


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.

6565

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

A: finalA: final

B: initialB: initial

C: liquidC: liquid

D: vapor D: vapor

6666

Every refrigerating system Every refrigerating system shall be protected by; shall be 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.

6767

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

6868

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.

6969

EPA regulations require that leaking EPA regulations require that leaking commercial and industrial process 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: 15B: 15

C: 25C: 25

D: 35D: 35

7070

After reaching the required After reaching the required recovery vacuum on an appliance, recovery vacuum on an appliance, you should; you should;

A: immediately disconnect the recycling or A: immediately disconnect the recycling or recovery equipment and open the system recovery equipment and open the system for service.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 in there is still refrigerant in liquid form or in the oil.the oil.

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

7171

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


7272

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:




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

7373

Recovering refrigerant from a Recovering refrigerant from a system in vapor phase will minimize system in vapor phase will minimize loss of; loss of;

A: water.A: water.

B: oil.B: oil.

C: refrigerant.C: refrigerant.


7474

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

7575

For what refrigerant (s) is an equipment For what refrigerant (s) is an equipment room refrigerant monitor required under room refrigerant monitor required under ASHRAE Standard 15?ASHRAE Standard 15?

A: R-12.A: R-12.

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

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


7676

Refrigerant cannot be recovered Refrigerant cannot be recovered without isolating a parallel without isolating a parallel compressor system because of; compressor system because of;

A: the service valve connection.A: the service valve connection.

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

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

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

7777

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

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

7878

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.

7979

TYPE IIITYPE III

8080

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

8181

With a low-pressure chiller, what With a low-pressure chiller, what must you do after recovering the must you do after recovering the liquid refrigerant? liquid refrigerant?

A: Recover the vapor refrigerant.A: Recover the vapor refrigerant.

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

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

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

8282

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: 15B: 15

C: 25C: 25

D: 35D: 35

8383

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.

8484

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

8585

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

8686

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

8787

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

8888

Charged low pressure refrigeration Charged low pressure refrigeration machines may be most efficiently machines may be most efficiently leak checked by; leak checked by;

A: adding dry nitrogen.A: adding dry nitrogen.

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

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

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

8989

Why do chillers using CFC-11 Why do chillers using CFC-11 and HCFC-123 require purge and HCFC-123 require purge units? units?

A: Purge units remove moisture.A: Purge units remove moisture.

B: System operates below B: System operates below atmospheric pressure. atmospheric pressure.

C: Purge units remove refrigerant C: Purge units remove refrigerant from oil sump.from oil sump.

D: Purge units remove CFCs from the D: Purge units remove CFCs from the chiller. chiller.

9090

A typical setting for the high A typical setting for the high pressure cut-out control on a pressure cut-out control on a recovery unit used for evacuating recovery unit used for evacuating the refrigerant from a low pressure the refrigerant from a low pressure chiller is; chiller is; A: 2 psig.A: 2 psig.




9191

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: 15B: 15

C: 25C: 25

D: 35 D: 35

9292

After system servicing, why is After system servicing, why is refrigerant vapor re-introduced to refrigerant vapor re-introduced to the refrigeration system be fore the refrigeration system be fore refrigerant liquid? refrigerant liquid?

A: Vapor charging increases pressure slowly, A: Vapor charging increases pressure slowly, preventing failure of the rupture disk.preventing failure of the 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 control C: Liquid charging is more difficult to control than vapor charging.than vapor charging.

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

9393

Refrigerant-11 at a pressure of 18.1 Refrigerant-11 at a pressure of 18.1 inches Hg vacuum has a saturation inches Hg vacuum has a saturation temperature of; 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.

9494

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 low-pressure technicians must evacuate low-pressure appliances to the following level before appliances to the following level before disposing of the appliance:disposing of the appliance:



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

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

9595

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

A: Adding nitrogen.A: Adding nitrogen.

B: Warming the refrigerant.B: Warming the refrigerant.

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

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

9696

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 switch. C: Replacement of a switch.

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

9797

Appliances need not be evacuated Appliances need not be evacuated all the way to the prescribed level all the way to the prescribed level when;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.

9898

After reaching the required After reaching the required recovery vacuum on an appliance, recovery vacuum on an appliance, you should; you should;

A: immediately disconnect the recycling or A: immediately disconnect the recycling or recovery equipment and open the system recovery equipment and open the system for service.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 in there is still refrigerant in liquid form or in the oil.the oil.

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

9999

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.


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

100100

The PRIMARY purpose of a The PRIMARY purpose of a purge unit on a CFC-11 chiller purge unit on a CFC-11 chiller is to; 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.

101101

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

A: Al.A: Al.

B: A2.B: A2.

C: Bl.C: Bl.

D: B2. D: B2.

102102

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

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

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

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


103103

On a centrifugal system, the purge On a centrifugal system, the purge unit takes its suction from the;unit takes its suction 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.

104104

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

105105

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

Section 608 Certification Pre-Test

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