Module 07 Part 5

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09. Pipes and Hoses.

Question Number. 1. When carrying out a pressure test on a pipe it should be.

Option A. twice the working pressure for two minutes.Option B. 1.5 times the working pressure.

Option . three times the working pressure for fi!e minutes.

orrect Answer is. 1.5 times the working pressure.

"#planation. $eaflet 5%5 &.5.

Question Number. '. When checking a hose after installation it should be checked for

freedom of mo!ement.

Option A. by fle#ing through the normal operating range plus 15(.

Option B. by fle#ing through the normal operating range only.

Option . by fle#ing )*%15( either side of the neutral position.

orrect Answer is. by fle#ing through the normal operating range plus 15(.

"#planation. $eaflet 5%5 &.+.'.

Question Number. ,. -f the outer co!er of a fle#ible hose is found to be cracked.

Option A. it is unser!iceable since it may ha!e a restricted flow.

Option B. it may still be ser!iceable.

Option . it is unser!iceable since it may leak.

orrect Answer is. it may still be ser!iceable.

"#planation. $eaflet 5%5 .'.'.

Question Number. +. A rigid hydraulic pipe re/uires shaping. -t should be carried out.

Option A. after annealing.

Option B. after age hardening.

Option . as supplied.

orrect Answer is. as supplied.

"#planation. A-0 B$*2%15 ,., and +.+.+ 3iii4.

Question Number. 5. retting corrosion on a braided pipe would mean it was.

Option A. unser!iceable and should be replaced.

Option B. not necessarily unser!iceable.

Option . only unser!iceable if the corrosion penetrates the braids.orrect Answer is. unser!iceable and should be replaced.

"#planation. N-$.

Question Number. 2. 0ipe flaring is carried out.

Option A. as supplied.

Option B. in the annealed state.

Option . after normali6ing.


"#planation. B$*2%15.

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Question Number. . 7o allow for shrinkage8 !ibration and whip all straight hoses must be.

Option A. 59 longer than the distance between the fittings.

Option B. '9 longer than the distance between the fittings.

Option . ,9 longer than the distance between the fittings.orrect Answer is. ,9 longer than the distance between the fittings.

"#planation. AA-0 $eaflet 5%5 2.5.

Question Number. &. A fle#ible hose that cannot be internally inspected by eye or

introscope can be ball tested by suspending from one end at a time to check.

Option A. a ball of :59 of bore of hose can be pushed through with a metal rod.

Option B. a ball of :&9 of bore of end fittings passes freely under own weight.

Option . ball of :;9 of bore of end fittings passes freely under own weight.

orrect Answer is. ball of :;9 of bore of end fittings passes freely under own weight.

"#planation. AA-0 $eaflet 5%5 :.5., a.

Question Number. :.

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Question Number. 1,. 7o pre!ent corrosion where aluminium alloy pipelines are supported

by rubber cleats8 the pipe should be treated o!er the area of contact with.

Option A. french chalk.

Option B. !arnish.

Option . petroleum @elly.orrect Answer is. !arnish.

"#planation. N-$.

Question Number. 1+. 7he international marking for an instrument air pipe line is a.

Option A. series of dots.

Option B. 6ig 6ag line.

Option . wa!y band.

orrect Answer is. 6ig 6ag line.

"#planation. ?eppesen A>0 Airframe 7echnician 7e#tbook 0age 1;%1,8 A>0 7echnician eneral

page 1;%1, figure 1;%'&.

Question Number. 15. 7he ma#imum distance between end fittings to which a straight hose

assembly is to be connected is 5; inches. 7he minimum hose length should be.

Option A. 51 inches.

Option B. 51= inches.

Option . , inches.

orrect Answer is. 51= inches.

"#planation. AA-0 $eaflet 5%5 2.5.

Question Number. 12. 7he length of a hose assembly with elbowed end fittings is takenfrom.

Option A. the ma#imum length of the straight portion of hose.

Option B. the centre of the bore at the nipple e#tremity.

Option . the e#treme o!erall length.

orrect Answer is. the centre of the bore at the nipple e#tremity.

"#planation. A-0 A$* ,%1, 0ara '%,.

Question Number. 1. 7he international marking for a breathing o#ygen pipe line is a series

of.

Option A. dots.

Option B. diamonds.Option . rectangles.

orrect Answer is. rectangles.

"#planation. ?eppesen A>0 eneral 7echnician 7e#tbook 0age 1;%1,.

Question Number. 1&. 7he resistance between a fle#ible hose and a component should not

e#ceed.

Option A. 1 ohm.

Option B. ;.5 ohm.

Option . ;.;5 ohm.

orrect Answer is. ;.;5 ohm.

"#planation. $eaflet 5%5 :.5.5.


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Question Number. 1:. Bore tests of fle#ible hoses are carried out using a suitable ball or

bobbin of.

Option A. :;9 of the diameter of the end fittings.

Option B. &59 of the diameter of the end fittings.Option . '59 of the diameter of the end fittings.

orrect Answer is. :;9 of the diameter of the end fittings.

"#planation. $eaflet 5%5 :.5., 3a4 3ii4.

Question Number. ';. 7he $ay $ine on a fle#ible hose is.

Option A. an arrow painted on the hose to show the direction of fluid flow.

Option B. a white line painted the full length of the hose to indicate any twist in the hose.

Option . a white line painted the full length of the hose to indicate any stretch in the hose.

orrect Answer is. a white line painted the full length of the hose to indicate any twist in the

hose.

"#planation. A$*,%1, +.' figure +.

Question Number. '1. Aluminium alloy pipe used for hydraulics systems is flared.

Option A. normali6ed.

Option B. as supplied.

Option . annealed.


"#planation. B$*2%15 2.'.

Question Number. ''. -dentify the parts re/uired to make up a flared%tube fittingC.Option A. lee!e and nut.

Option B. errule and nut.

Option . Body8 slee!e and nut.

orrect Answer is. lee!e and nut.

"#planation. B$*2%15 2.'.'. A>0 Dechanic eneral

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Option B. absorb !ibration.

Option . fit to the aircraft structure.

orrect Answer is. allow for e#pansion and contraction due to heat and absorb !ibration.

"#planation. Answer b is @ust too ob!ious.

Question Number. '2. Fou find a pipe with a flare end fitting of +(. What specification has

it been manufactured toC.

Option A. A...

Option B. A.N.

Option . .A.".

orrect Answer is. A.N.

"#planation. B$*2%15 2.1.

Question Number. '. Bonding connections between fle#ible and rigid pipes are achie!ed

by.

Option A. ti%wrapping the bonding lead to the pipes.

Option B. using a corrugated strip.

Option . tucking the bonding leads between the fle#ible and rigid pipes.

orrect Answer is. using a corrugated strip.

"#planation. AA-0 :%18 ,.2.1.

10. Springs.

Question Number. 1. prings are manufactured from.

Option A. high carbon alloy steel with high strength re/uirements.Option B. low carbon alloy steel with high strength re/uirements.

Option . high carbon alloy steel with low strength re/uirements.

orrect Answer is. high carbon alloy steel with high strength re/uirements.

"#planation. prings are made from high carbon steel with high strength re/uirements.

Question Number. '. A wear check on a cylinder head !al!e spring should include.

Option A. length under load.

Option B. diameter and length.

Option . length off%load.

orrect Answer is. length under load.

"#planation. "$*,%' para +.+ and Aircraft Eeciprocating "ngines8 ?eppesen. 0age &&.

Question Number. ,. Daterial used for springs is.

Option A.

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Question Number. 1. Needle roller bearings.

Option A. are susceptible to brinelling.

Option B. can accept a small amount of misalignment.

Option . are designed to carry a#ial loads.

orrect Answer is. are susceptible to brinelling."#planation. A-0 B$*2%1+ para '.,.1 ii.

Question Number. '. When rotating a ball bearing by hand8 a regular click indicates.

Option A. damage to the balls.

Option B. intergranular corrosion in the outer ring.

Option . a cracked ring.

orrect Answer is. a cracked ring.

"#planation. N-$.

Question Number. ,. Brinelling of a wheel bearing could be caused by.

Option A. rotation of the outer race in the wheel housing.

Option B. hea!y landing.

Option . o!erheating of the brakes.

orrect Answer is. hea!y landing.

"#planation. N-$.

Question Number. +. Brinelling of a bearing is.

Option A. bluing of the bearing due to o!erheating.

Option B. shallow smooth depressions caused by the rollers being forced against the cup8 due to

o!ertor/uing.Option . indentations in the race surface caused by continual static !ibration.

orrect Answer is. shallow smooth depressions caused by the rollers being forced against the

cup8 due to o!ertor/uing.

"#planation. N-$.

Question Number. 5. A tapered roller bearing is designed to take.

Option A. radial loads only.

Option B. both radial and a#ial loads.

Option . a#ial loads only.

orrect Answer is. both radial and a#ial loads.

"#planation. N-$.

Question Number. 2. mall indentations in the race of a ball bearing indicate.

Option A. o!ertor/uing.

Option B. corrosion.

Option . brinelling.

orrect Answer is. brinelling.

"#planation. ?eppesen A>0 Airframe 7e#tbook 1%+2.

Question Number. . When fitting a ball bearing to a shaft it should be carefully positioned

using.Option A. a steel drift with light blows.


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Option B. a copper or aluminium tube drift.

Option . a soft steel or brass tube drift.

orrect Answer is. a soft steel or brass tube drift.

"#planation. A-0 B$*2%1+ 5.+.

Question Number. &. raphite pre!ents sei6ure and conducts heat. -t is normally used in.

Option A. lithium based greases.

Option B. sodium based greases.

Option . copper based greases.

orrect Answer is. sodium based greases.

"#planation. raphite is added to sodium based greases.

Question Number. :. alse Brinelling of a bearing is.

Option A. mo!ement of the outer ring relati!e to its housing.

Option B. indentations on the race%way due to load transferred through the bearing when static.

Option . a scoring of the race%way surfaces due to ball or roller skidding.

orrect Answer is. indentations on the race%way due to load transferred through the bearing

when static.

"#planation. N-$.

Question Number. 1;. On completion of assembly the bearing housing.

Option A. should be e#amined for end float.

Option B. packed fully with grease.

Option . lightly packed with grease.orrect Answer is. lightly packed with grease.

"#planation. N-$.

Question Number. 11. When checking a ball bearing for corrosion and foreign matter.

Option A. rotate at operational speed and check for roughness.

Option B. make a strip down inspection.

Option . oscillate and rotate slowly to listen for roughness.

orrect Answer is. oscillate and rotate slowly to listen for roughness.

"#planation. N-$.

Question Number. 1'. What type of load is a @ournal loadC.

Option A. Eadial.

Option B. A#ial.

Option . entrifugal.

orrect Answer is. Eadial.

"#planation. N-$.

Question Number. 1,. Bearings to be cleaned for further e#amination should be wiped free

of all grease on outer surfaces with the aid of dry compressed air for cages and rolling parts. 7he

bearings should then be soaked in.

Option A. D.".G.Option B. lead free gasoline.


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Option . white spirit.

orrect Answer is. white spirit.

"#planation. A-0a B$*2%1+ &.1.

Question Number. 1+. After cleaning a bearing should be dried with.

Option A. left in free air to dry naturally.

Option B. clean8 warm8 dry compressed air.

Option . lint free rags.

orrect Answer is. clean8 warm8 dry compressed air.

"#planation. ?eppesen A>0 Airframe 7echnician 7e#tbook 0age :%&.

Question Number. 15. 7hrust bearings transmit.

Option A. thrust loads8 thus limiting a#ial mo!ement.

Option B. radial loads8 thus limiting a#ial mo!ement.

Option . thrust loads8 thus limiting radial mo!ement.

orrect Answer is. thrust loads8 thus limiting a#ial mo!ement.

"#planation. B$*2%1+ '.'., and ,.1.

Question Number. 12. hipping of a ball bearing indicates.

Option A. brinelling.

Option B. chattering.

Option . spalling.

orrect Answer is. spalling.

"#planation. N-$.

Question Number. 1. A

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Question Number. ';. Ball and roller bearings are made from a combination of low carbon

steel and a percentage of.

Option A. hromium.

Option B. Nickel.Option . Nickel chrome.

orrect Answer is. Nickel.

"#planation. Outer rings are made from high carbon chromium alloy steel. -nner rings are made

from low carbon nickel alloy steel and deep case carbori6ed.

Question Number. '1. On inspection a bearing is found to ha!e distortion8 what action

should be takenC.

Option A. Ee@ect bearing.

Option B. No action re/uired. ome distortion is normal.

Option . Blend out distortion and re%grease bearing.

orrect Answer is. Ee@ect bearing.

"#planation. N-$.

Question Number. ''. On inspection a bearing is found to show signs of o!erheating8 what

action should be takenC.

Option A. Ee@ect bearing.

Option B. No action re/uired. ome o!erheating is normal.

Option . clean up bearing and repack with grease.

orrect Answer is. Ee@ect bearing.

"#planation. N-$.

Question Number. ',. When a bearing has ' parts and the inner ring and outer ring is

installed.

Option A. neither of the practices are allowed.

Option B. the inner ring can be remo!ed from its inner shaft for cleaning.

Option . the outer ring can be remo!ed from its housing for inspection.

orrect Answer is. the outer ring can be remo!ed from its housing for inspection.

"#planation. N-$.

12. Transmissions.

Question Number. 1. A chain remo!ed for routine inspection8 it.

Option A. does not need proof loading.

Option B. must be proof loaded to 5;9.

Option . must be proof loaded to 15;9.

orrect Answer is. does not need proof loading.

"#planation. $eaflet 5%+ 2.2.

Question Number. '. An aircraft control chain is connected using.

Option A. nuts and bolts.

Option B. /uick release pins.

Option . a split link and spring clip.orrect Answer is. nuts and bolts.


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"#planation. $eaflet 5%+ ,.+.

Question Number. ,. -f a control chain can be lifted clear of a tooth8 it should be.

Option A. re@ected as unser!iceable.Option B. remo!ed and an elongation check carried out.

Option . cleaned8 re%tensioned and inspected after a period of time.

orrect Answer is. remo!ed and an elongation check carried out.

"#planation. $eaflet 5%+ 5.,.

Question Number. +. 7o check a chain for articulation.

Option A. it should be run o!er the finger through 1&;( and checked for smoothness and kinks.

Option B. mo!e each link indi!idually and check for tightness.

Option . lay on a flat surface and check for kinks.

orrect Answer is. it should be run o!er the finger through 1&;( and checked for smoothness and

kinks.

"#planation. ?eppesen A>0 Airframe 7e#tbook '%'.

Question Number. 5.

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Question Number. :. After a chain has been cleaned in paraffin it should be.

Option A. hung up to drip dry.

Option B. dried in hot air.

Option . washed in soapy water then hung to drip dry.orrect Answer is. dried in hot air.

"#planation. A$*,%' 2.,.1 a.

Question Number. 1;. What fraction of the minimum breaking load should be the proof load

for a chainC.

Option A. ;.1.

Option B. 1*,.

Option . ;.19.

orrect Answer is. 1*,.

"#planation. $eaflet 5%+ ,.,. A$*,%' 0ara 2%2.

Question Number. 11. -f corrosion is found on a chain.

Option A. replace the chain.

Option B. clean off the corrosion and if acceptable re%fit the chain.

Option . lubricate the chain.

orrect Answer is. replace the chain.

"#planation. $eaflet 5%+ 5.+. A$*,%' 0ara 5%+.

Question Number. 1'. 7he three principle dimensions specified for a chain is the diameter

of the rollers and.Option A. pitch and chain length.

Option B. the pitch and width between the inner plates.

Option . the pitch and width across the outside of the plates.

orrect Answer is. the pitch and width between the inner plates.

"#planation. $eaflet 5%+ 0ara.,.1. A$*,%' ,.1.

Question Number. 1,. 7he distance between the centres of the rollers of a chain is called.

Option A. pitch.

Option B. crest.

Option . length.orrect Answer is. pitch.

"#planation. $eaflet 5%+ ,.,. A$*,%' ,.1.

Question Number. 1+. Which of the following formulas should be used to calculate the

percentage e#tension of an aircraft control chainC NoteI D J Deasured length under load in inches K

J Number of pitches measured 0 J 0itch of chain in inches.

Option A. D ) 3K L K4 L 1;; * 0 L D.

Option B. K%3D L 04 L 1;; * D L 0.

Option . D%3K L 04 L 1;; * K L 0.

orrect Answer is. D%3K L 04 L 1;; * K L 0.

"#planation. A$*,%' 2.,.1 M.


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Question Number. 15. 7he ma#imum allowable e#tension of a chain assembly o!er a

nominal length is.

Option A. ,9.

Option B. 59.Option . '9.

orrect Answer is. '9.

"#planation. $eaflet 5%+ 2.,.'. A$*,%' 0ara 2.,.'.

Question Number. 12. A feather key locates a gear on a shaft and permits.

Option A. a positi!e dri!e with the gear firmly locked.

Option B. a positi!e and strong dri!e transmission.

Option . a positi!e dri!e and a#ial mo!ement.

orrect Answer is. a positi!e dri!e and a#ial mo!ement.

"#planation. A feather key allows a#ial mo!ement.

Question Number. 1. A chain is remo!ed by.

Option A. nuts and bolts.

Option B. spring clips.

Option . remo!ing chain links on an endless chain.

orrect Answer is. nuts and bolts.

"#planation. $eaflet 5%+ ,.+ > 2.

Question Number. 1&. 7he bo# unit in a 7elefle# control run which is not suitable for

hea!ily loaded controls is called.Option A. Houble entry.

Option B. ingle entry.

Option . traight lead.

orrect Answer is. traight lead.

"#planation. Both single and double entry bo#es are wrapped lead. "#ternal website.

httpI**saywell.co.uk*pages*morseon.htm

Question Number. 1:.

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Question Number. '. A control cable that has been contaminated with acid should be.

Option A. cleaned.

Option B. re@ected.

Option . cleaned8 inspected8 and reinspected after a period of time.orrect Answer is. re@ected.

"#planation. N-$.

Question Number. ,. A balance cable is installed in a control system to.

Option A. allow the aircraft to be flown hands off.

Option B. correct for wing hea!iness.

Option . enable the cable to be tensioned.

orrect Answer is. enable the cable to be tensioned.

"#planation. A>0 7echnician Airframe 7e#tbook '%'.

Question Number. +. 0 Airframe 7e#tbook 1%'.

Question Number. 2.

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Option . increase the tension and check with a magnifying glass.

orrect Answer is. run a rag along the cable in both directions.

"#planation. A+, %1+: 3d4.

Question Number. 15. -f the turnbuckles in a control system are tightened e#cessi!ely the

result will be.

Option A. the cable will break.

Option B. the cables will !ibrate e#cessi!ely and cause failure of controls.

Option . the aircraft will be hea!y on controls.

orrect Answer is. the aircraft will be hea!y on controls.

"#planation. A+, %1+: 3@4.

Question Number. 12. A control cable is proof loaded to ensure that.

Option A. the end fittings on the cable are secure.

Option B. it will not stretch after fitting in an aircraft.

Option . it will not break after fitting in an aircraft.

orrect Answer is. the end fittings on the cable are secure.

"#planation. $eaflet '%1' &.

Question Number. 1. British turnbuckles are checked for safety by.

Option A. looking through the hole and checking for threads showing.

Option B. attempting to pass a hardened pin probe through the inspection hole.

Option . attempting to push locking wire through the hole.

orrect Answer is. attempting to pass a hardened pin probe through the inspection hole.

"#planation. A$*,% :.5..

Question Number. 1&. A suspected chemical spillage on a cable8 you should.

Option A. clean8 inspect and refit immediately.

Option B. replace the cable.

Option . clean the cable and inspect '+ hours later.

orrect Answer is. replace the cable.

"#planation. N-$.

Question Number. 1:.

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orrect Answer is. 7o ensure the cable end passes the inspection hole on drilled through type

fittings but lea!es the locking wire hole clear.

"#planation. $eaflet '%1' 5.' 3d4. A-0 B$*2%'+ 5.' 3d4.

Question Number. '1. 7he inspection hole in a turnbuckle is.

Option A. to allow the locking wire to pass through for the purpose of locking.

Option B. to ensure that the locknuts are ade/uately tightened.

Option . to ensure that the turnbuckle is in safety.

orrect Answer is. to ensure that the turnbuckle is in safety.

"#planation. $eaflet '%1' :.5.. A-0 A$*,% :.5..

Question Number. ''. waging of a cable end fitting is checked by.

Option A. measuring the length of the barrel before and after swaging.

Option B. using a go * no%go gauge on the barrel.

Option . looking for cracks on the swage indicating poor swaging.

orrect Answer is. using a go * no%go gauge on the barrel.

"#planation. $eaflet '%1' 5., 3b4 ?eppesen A>0 Airframe 7echnician 7e#tbook 1%+,.

Question Number. ',. A flight control cable is replaced if.

Option A. single wires are blended together.

Option B. a wire is ';9 worn.

Option . the protecti!e fluid coating is missing.

orrect Answer is. single wires are blended together.

"#planation. A+, %1+: g.

Question Number. '+. -n aircraft control cables8 when a lock is fitted to the control surface.

Option A. it will pre!ent the control surface mo!ement but not the control column mo!ement.

Option B. it will pre!ent the control surface and the control column mo!ement.

Option . it will not pre!ent the control surface mo!ement but will lock the control column.

orrect Answer is. it will pre!ent the control surface and the control column mo!ement.

"#planation. N-$.

Question Number. '5. When checking cable tensions you are looking for.

Option A. free mo!ement only.Option B. full and free mo!ement.

Option . artificial feel.

orrect Answer is. full and free mo!ement.

"#planation. N-$.

Question Number. '2. A cable should be replaced when indi!idual wires are worn greater

than.

Option A. +;9.

Option B. 2;9.

Option . ';9.

orrect Answer is. +;9."#planation. A+, 0ara %1+: g.


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Module 07 Part 5

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