increase the lead without increasing the pitch.

increase the lead and decrease the pitch.

increase the lead and the pitch

Buttress threads are used.

to transmit power on one direction.

to transmit power in both directions.

For a wire insert thread repair, the hole is tapped using.

a special tap supplied with the kit.

Pitch of a screw thread is defined as.

distance from the centre of one crest to the next.

difference between major diameter and minor diameter.

distance between the crest and the root of the thread.

The angle of a screw thread is.

the inclusive angle of the thread sides.

half the inclusive angle of the thread sides.

the distance the thread moves in one turn.

The tang of a thread insert.

may left it in the insert after installation.

is removed with a hammer and a punch.

Which thread type has the better vibration resistance?.

Courseness or fineness of thread has no bearing on the vibration resistance.

What is the nominal length of a UNF bolt?.

Under head to screw threads (i.e. plain shank).

Under head to end of the threads.

What is the nominal screw length?.

The overall length of a countersunk screw and the non-threaded portion of a bolt.

The overall length of a bolt (from under the head) and the overall length of a screw (including the head).

The length of thread for a bolt, overall length for a countersunk screw.

A British close tolerance bolt is identified by.

a dropped collar under the head.

Dzuz Fasteners provide.

quick release fasteners at inspection panels

for easy hammering into position.

A bolt part number AN25C15 when compared to a bolt part number AN25-15 has.

a higher resistance to corrosion.

a less expensive design and product costs.

The head marking on a close tolerance BSF bolt is.

a raised disk on the head face.

a series of dots on the head face.

a lowered ring under the hexagon.

An aluminium alloy bolt may be identified by.

the letter A stamped on the head.

Rivnuts were originally used for.

securing rubber de-icing boots.

The AN526 truss-head screw.

provides a good clamping force.

is a widely used recesses head machine screw.

Capped nuts are used.

prevent overtightening due to the threaded portion being restricted by the cap.

require lubrication of the screw part only.

Capped nuts are used.

to stop leaks due to metal caps fitted on the heads.

to provide dry bolting of the joints.

A main difference between Lockbolt/Hucbolt tension and shear fasteners (other than their application) is in the.

number of locking collar grooves

One of the main advantages of the Hi-Lok type fasteners over earlier generations is that.

they can be installed with ordinary hand-tools.

they can be removed and reused again.

the squeezed on collar installation provides a more secure, tighter fit

The markings on the head of a Dzus fastener identify the.

body diameter, type of head and length of the fastener.

body type, head diameter and type of material.

manufacturer and type of material.

Threaded rivets (Rivnuts) are commonly used to.

attach parts or components with screws to sheet metal.

join two or more pieces of sheet metal where shear strength is desired.

join two or more pieces of sheet metal where bearing strength is desired.

A bolt with a single dash on the head is classified as an.

AN corrosion resistant steel bolt.

A bolt with an 'X' inside a triangle on the head is classified as an.

AN corrosion resistant steel bolt.

Test

Materiales hadware 3

oriol arrufat 200 preguntas

Hacer el test

Preguntas del test (200)

1Multi-start threads.
1. Aincrease the lead and decrease the pitch.
2. Bincrease the lead without increasing the pitch.
3. Cincrease the lead and the pitch
2Buttress threads are used.
1. Ato transmit power in both directions.
2. Bto transmit power on one direction.
3. Con nuts and bolts.
3The lead on a single start thread is.
1. A1 * the pitch.
2. B2 * the pitch.
3. C1/2 the pitch
4Colour identification of an aluminium rivet is.
1. Ablack.
2. Bviolet.
3. Cgreen.
5For a wire insert thread repair, the hole is tapped using.
1. Athe same size.
2. Ba special tap supplied with the kit.
3. Cthe next size up.
6Most commonly used thread form in aviation is.
1. AV thread.
2. Bround thread.
3. Cbuttress.
7Pitch of a screw thread is defined as.
1. Adistance from the centre of one crest to the next.
2. Bdifference between major diameter and minor diameter.
3. Cdistance between the crest and the root of the thread.
8The angle of a screw thread is.
1. Ahalf the inclusive angle of the thread sides.
2. Bthe inclusive angle of the thread sides.
3. Cthe distance the thread moves in one turn.
9The tang of a thread insert.
1. Amay left it in the insert after installation.
2. Bis removed with a hammer and a punch.
3. Cmust be removed
10A thread insert may be removed by.
1. Aa blade removal tool.
2. Ba hammer and punch.
3. Ca pre-wind insertion tool

11A metric screw thread angle is.
1. A7 °.
2. B57 °.
3. C60 °.
12Which thread type has the better vibration resistance?.
1. AA fine thread.
2. BA course thread.
3. CCourseness or fineness of thread has no bearing on the vibration resistance.
13Which of the following thread designations is most fatigue resistant?.
1. AUNF.
2. BUNC.
3. CUNJF.
14Which thread type has a 55 ° angle?.
1. AMetric.
2. BWhitworth.
3. CUNF.
15What sort of surface treatment would you find on a magnesium casting?.
1. AAnodizing.
2. BPhosphating.
3. CChromating.
16What is the nominal length of a UNF bolt?.
1. AUnder head to end of the threads.
2. BUnder head to screw threads (i.e. plain shank).
3. CThe length of the threads
17Where should you not use a nyloc nut?.
1. ATemperatures above 120 °C.
2. BTemperatures above 200 °C.
3. CTemperatures above 250 °C
18What is the nominal screw length?.
1. AThe overall length of a countersunk screw and the non-threaded portion of a bolt.
2. BThe overall length of a bolt (from under the head) and the overall length of a screw (including the head).
3. CThe length of thread for a bolt, overall length for a countersunk screw.
19A unified thread is identified by.
1. Aan 'X' on the head.
2. Ba raise ring on the head.
3. C2 or 3 rings on the head
20An AN steel bolt is identified by what marking on the head?.
1. AA dash.
2. B14E.
3. CAn 'x'.
21A British close tolerance bolt is identified by.
1. Aa raised ring on the head.
2. Ban 'X' on the head.
3. Ca dropped collar under the head.
22A blind fastener described as external sleeve and internally threaded would be.
1. Aa cherry lock.
2. Ba rivnut.
3. Ca jo bolt.
23Studs which have a size larger thread at one end are called.
1. Astepped studs.
2. Bshouldered studs.
3. Cplain studs.
24A bolt with a raised dash is.
1. AAN standard.
2. Bclose tolerance.
3. CCorrosion Resistant Steel.
25A dowel will take what loads?.
1. Ashear.
2. Btensile.
3. Ctorsion.
26Dzuz Fasteners provide.
1. Afor easy hammering into position.
2. Ba close tolerance fit.
3. Cquick release fasteners at inspection panels
27The initials U.N.C when related to aircraft bolts stands for.
1. AUnited National Countersunk.
2. BUnified National Coarse.
3. CUnified National Centred.
28A bolt part number AN25C15 when compared to a bolt part number AN25-15 has.
1. Aa less expensive design and product costs.
2. Ba higher resistance to corrosion.
3. Ca higher pitch thread.
29The head marking on a close tolerance BSF bolt is.
1. Aa series of dots on the head face.
2. Ba raised disk on the head face.
3. Ca lowered ring under the hexagon.
30In the drawing, what letter represents the nominal length of a BSF bolt?.
1. AA.
2. BB
3. CC
31An aluminium alloy bolt may be identified by.
1. Aits colour (dyed black).
2. Bthe letter A stamped on the head.
3. Cits colour (dyed green).
32A (British) 3/8 inch dia. UNF bolt will have the diameter code letter.
1. AN
2. BG
3. CJ
33An AN steel bolt is identified by.
1. Aon head.
2. BX on head.
3. Cplain bolt.
34Rivnuts were originally used for.
1. Asecuring structural parts.
2. Bsecuring rubber de-icing boots.
3. Csecuring cabin floorings.
35 Fork end fittings on control rod ends should have.
1. Aanti vibration compound.
2. B0.002 inch axial movement.
3. Cbolt heads fitted upwards
36The AN526 truss-head screw.
1. Aprovides a good clamping force.
2. Bis a widely used recesses head machine screw.
3. Cis a pan-head screw.
37Capped nuts are used.
1. Aprevent overtightening due to the threaded portion being restricted by the cap.
2. Bto provide a dry torque joint.
3. Cto stop leaks
38A pin in a fork end fitting is subjected to what loading?.
1. A Shear.
2. BTensile.
3. CTorsion
39Hylocks.
1. Arequire lubrication of the screw part only.
2. Bare pre-lubricated.
3. Cdo not require lubrication
40UNF means.
1. Aunified fine.
2. Bunion national fine.
3. Cunited nations fine.
41A clevis bolt in a control cable fork end would be loaded in.
1. Ashear.
2. Btension.
3. Cboth tension and shear.
42Capped nuts are used.
1. Ato provide dry bolting of the joints.
2. Bto lock the nut to the bolt.
3. Cto stop leaks due to metal caps fitted on the heads.
43A main difference between Lockbolt/Hucbolt tension and shear fasteners (other than their application) is in the.
1. Ashape of the head.
2. Bmethod of installation.
3. Cnumber of locking collar grooves
44One of the main advantages of the Hi-Lok type fasteners over earlier generations is that.
1. Athey can be installed with ordinary hand-tools.
2. Bthey can be removed and reused again.
3. Cthe squeezed on collar installation provides a more secure, tighter fit
45The markings on the head of a Dzus fastener identify the.
1. Abody diameter, type of head and length of the fastener.
2. Bbody type, head diameter and type of material.
3. Cmanufacturer and type of material.
46The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud length is measured in.
1. Asixteenths of an inch.
2. Btenths of an inch.
3. Chundredths of an inch
47Threaded rivets (Rivnuts) are commonly used to.
1. Ajoin two or more pieces of sheet metal where shear strength is desired.
2. Battach parts or components with screws to sheet metal.
3. Cjoin two or more pieces of sheet metal where bearing strength is desired.
48Aircraft bolts with a cross or asterisk marked on the bolt-head are.
1. Amade of aluminium alloy.
2. Ba standard steel bolts.
3. Cclose tolerance bolts
49A bolt with a single dash on the head is classified as an.
1. ANAS standard aircraft bolt.
2. BAN corrosion resistant steel bolt.
3. CNAS close tolerance bolt
50A bolt with an 'X' inside a triangle on the head is classified as an.
1. ANAS standard aircraft bolt.
2. BNAS close tolerance bolt.
3. CAN corrosion resistant steel bolt.
51Aircraft bolts are usually manufactured with a.
1. Aclass 1 fit for the threads.
2. Bclass 2 fit for the threads.
3. Cclass 3 fit for the threads.
52The cage of an Instrument Mounting nut is made from.
1. Asteel.
2. Bbrass.
3. Cphosphor bronze.
53The speed nut of an Instrument Mounting nut is made from.
1. Abrass.
2. Bsteel.
3. Cphosphor bronze.
54The length of a clevis bolt.
1. Aincludes the head and the thread.
2. Bis the plain shank portion only.
3. Cincludes the threads but not the head.
55How many times can a locking plate be used?.
1. Aindefinitely providing it is a good fit around the component to be locked.
2. Bonce, then discarded.
3. C3 times, then discarded.
56The taper of a standard taper pin is.
1. A1 in 48.
2. B1 in 36.
3. C1 in 20
57When using a spring washer, the plain washer would be fitted.
1. Abetween spring and part.
2. Bbetween head and spring.
3. Cunder the nut
58How many times can you use a locking plate?.
1. AUntil all the tabs have been broken off.
2. BAs long as it remains serviceable.
3. COnce only.
59Wire locking approach angles should not be less than.
1. A45 °.
2. B90 °.
3. C10 °.
60A spring type washer when used on an aluminium component must be used.
1. Awith a plain washer.
2. Bby itself.
3. Cwith a tab washer.
61Nickel alloy steel split pins can be used.
1. Arepeatedly provided they remain a good fit.
2. Bonly once, because the legs are spread and bent.
3. Cwith a spring washer and a stiff nut
62A pre-load indicating washer is correctly loaded when.
1. Athe inner ring rotates.
2. Bthe inner ring is gripped.
3. Cthe outer ring is gripped.
63The advantage of circlips is.
1. Ait can be used for both inner and external applications.
2. BBoth a and b.
3. Cit is cheap
64A press fit requires.
1. Athe hole to be expanded by heat.
2. Bsome sort of driving force.
3. Cthe shaft to be shrunk by cooling
65A non metallic locknut is.
1. Anever used over 250 °F.
2. Bnever torqued.
3. Cnever re-used.
66Which can be re-used?.
1. ALocking plate, circlip, spring washer.
2. BShake proof washer, spring washer, locking plate.
3. CTab washer, circlip, locking plate
67A tab washer has been removed after fitment for a short time from a non essential system, the tab washer may be.
1. Are-used.
2. Bre-used if a spare is not available.
3. Cnot re-used.
68Taper pins are subject to what loads?.
1. ATensile.
2. BCompressive.
3. CShear
69In the drawing, both bolts are correctly wire locked when.
1. Aboth A and B are right hand threads.
2. BA is a right hand thread and B is a left hand thread.
3. Cboth A and B are left hand threads.
70A turnbuckle locknut is a.
1. Astiff nut.
2. Bslotted nut.
3. Ccastle nut.
71A spring washer.
1. Amay be used a second time provided it is fitted the reverse way round.
2. Bmaybe used more than once provided it continues to provide an efficient lock.
3. Cmust not be used more than once.
72An internal circlip can be used to.
1. Aretain a ball bearing in a housing.
2. Bto do both of the above.
3. Cretain a ball bearing on a shaft
73A washer having both twisted teeth and spring actions is.
1. AAN970 large-area flat washer.
2. BAN936 shake-proof lock washer.
3. CAN935 split-ring lock washer.
74Split pins.
1. Amay be used only once.
2. Bcan be used more than once but depends on the material of the split pin.
3. Cmay be used more than once
75How is the locking feature of the fibre-type locknut obtained?.
1. ABy a fibre insert held firmly in place at the base of the load carrying section.
2. BBy the use of an unthreaded fibre locking insert.
3. CBy making the threads in the fibre insert slightly smaller than those in the load carrying section.
76Split pins are made from.
1. Abrass or Low carbon steel - cadmium plated,.
2. Bbrass or stainless steel.
3. CLow carbon steel - cadmium plated, or stainless steel
77Forming a solution treated rivet gives it 75% of its hardness. What gives it the other 25%?.
1. ALeave at room temperature for four hours.
2. BPrecipitation treat the component when forming is complete.
3. CPut them in a refrigerator
78If D or DD rivets are not formed in time , or removed from the freezer in time, they.
1. Amust be discarded.
2. Bmust be re-heat treated before use.
3. Ccan be re-heat treated once then discarded
79A joggle in a removed rivet is indication of what type of partial failure?.
1. ABearing.
2. BShear.
3. CCompression.
80How is a British aluminium rivet identified?.
1. ABlack anodic finish.
2. BNatural anodised finish.
3. CViolet anodic finish
81A BS rivet made from L36 would be what colour and marking?.
1. ABlack anodic with an 'A'.
2. BNatural anodic with no marking.
3. CGreen anodic with an 'X'.
82What do the letters and numbers on a British rivet mean?.
1. AMaterial specification only.
2. BMaterial and finish.
3. CHead shape, material and finish.
83A natural finish aluminium alloy rivet with a D on it is.
1. Ahiduminium L86.
2. Baluminium L36.
3. Cduralumin L37
84A 5% magnesium rivet is identified by.
1. Aviolet anodise with 'S' on it.
2. Bgreen anodise with 'X' or an '8' on it.
3. Cblack anodise with 'A' on it.
85What metal is suitable for riveting magnesium alloy?.
1. AMonel metal.
2. B5056 aluminium alloy.
3. C1100 aluminium alloy.
86What metal is suitable for riveting alloy steel?.
1. AAluminium alloy.
2. BMonel metal.
3. CMild steel.
87An aluminium alloy L37 rivet identification is.
1. AX embossed.
2. BO embossed.
3. CD embossed.
88Rivet allowance is.
1. A1.5d.
2. B1d plus the thickness of the material.
3. C1.5d plus the thickness of the material
89D and DD rivets are refrigerated to.
1. Aprecipitation harden.
2. Bincrease age hardening.
3. Cretard age hardening
90What do you do to 2017 and 2024 rivets after heat treatment?.
1. ALeave for a minimum of 2 hours before using.
2. Brefrigerate for a minimum of 2 hours before using.
3. CUse immediately or refrigerate.
91An American rivet with a cross on the head is.
1. A2124 aluminium alloy.
2. B2117 aluminium alloy.
3. C5056 aluminium alloy
92A countersunk rivet of the ‘SP’ series has a head style of.
1. A20 °.
2. B90 °.
3. C100 °.
93The coding of a British rivet indicates.
1. Alength and diameter.
2. Bhead type and colour.
3. Cmaterial and head type.
94A factor which determines the minimum space between rivets is the.
1. Athickness of the material being riveted.
2. Bdiameter of the rivets being used.
3. Clength of the rivets being used.
95Joggles in removed rivet shanks would indicate partial.
1. Atorsion failure.
2. Bshear failure.
3. Cbearing failure
96A rivet that has 5% magnesium is identified as.
1. Aanodic violet and has an X.
2. Banodic green and has an X.
3. Cnatural and has an m
97Identification of British aluminium alloy rivets is with.
1. Aa part number on the head.
2. Ba letter and number code.
3. Ca colour and number stamped on the head
98If you can only gain limited access to both sides of a structure, what would you use to repair the structure?.
1. AA hylok.
2. BA blind rivet.
3. CA pop rivet.
99Alloy rivets are heat treated by.
1. Asolution treating.
2. Bannealing.
3. Canodising.
100When a solid rivet is formed it only holds 75% of its shear strength, the other 25% comes from.
1. Aleaving assembly for 4 days to age harden.
2. Bheating the completed assembly.
3. Ccooling completed assembly.
101A rivet with no marking has the material code.
1. AAD.
2. BA.
3. CD.
102Rivet MS20426 has what head type?.
1. ACSK.
2. BUniversal.
3. CRound.
103What is meant by the term Pitch Ratio?.
1. AThe area of contact between the two sheets of metal when joining by rivets.
2. BThe distance between the hole and the edge of the material.
3. CThe distance between two holes.
104The length of solid rivets is in graduations of.
1. A1/16 inch.
2. B1/8 inch.
3. C1/4 inch
105What would be the diameter and length of a solid rivet if the following markings are given, AS 162-408?.
1. A¼ inch dia, ½ inch length.
2. B½ inch dia, 1 inch length.
3. C1/8 inch dia, ½ inch length
106What would the marking .5 indicate after the normal part number of a solid rivet?.
1. AThe rivet length in graduations of 1/8 inch.
2. BThe diameter of the rivet is half an inch.
3. CIndicates close tolerance rivet.
107What is the pressure range for the Avdel Riveter type F?.
1. A60 to 80 psi.
2. B20 to 60 psi.
3. C40 to 60 psi.
108What is the length of the operation stroke of the Avdel Riveter type F?.
1. A½ inch.
2. B7/8 inch.
3. C1 inch.
109If a sheet of aluminium alloy of 0.032 and 0.064 is to be joined together the rivet should be.
1. A0.032 plus 2D.
2. B0.096 plus 1.5 D.
3. C0.064 plus 1D.
110Where would a pop rivet with a break stem mandrel be used?.
1. AIn a closed structure.
2. BWhere the head can be retrieved.
3. CAny situation calling for a pop rivet.
111A chobert rivet gun may be used.
1. Auntil the end has worn 0.002 inch below nominal diameter.
2. Bindefinately.
3. Conce only.
112Avdel rivets are closed by.
1. Aa tapered mandrel.
2. Bbroaching.
3. Csqueezing
113Countersunk rivets have two angles of countersink, these are.
1. A100 - 115 degrees.
2. B125 - 135 degrees.
3. C100 -160 degrees.
114On a CHERRY MAX rivet, after the riveting process the mandrel section or stem is.
1. Ais ground down flush to rivet head.
2. Bdiscarded.
3. Cremains in the rivet sleeve to provide mechanical strength
115A 'HUCK' rivet is similar in design to a.
1. Ablind rivet.
2. Bdome head rivet.
3. Ccherry rivet.
116On a structural repair, what type of rivet would you use when the back side cannot be accessed?.
1. APop rivet.
2. BHi-loc rivet.
3. CBlind rivet.
117What material is suitable for riveting steel?.
1. AAluminium alloy.
2. BMonel.
3. CCopper
118Cadmium plated rivets should not be used where the temperature may exceed.
1. A120 °C.
2. B250 °C.
3. C200 °C.
119What rivets should be used with nickel alloy steel?.
1. AAluminium Alloy.
2. BMild Steel.
3. CMonel.
120What is an advantage of a double flare on aluminium tubing?.
1. AEase of construction.
2. BIt is more resistant to the shearing effect of torque.
3. CIt is less resistant to the shearing effect of torque
121What type loads cause the most rivet failures?.
1. ABearing.
2. BShear.
3. CHead.
122Rivet's main strength quality is to resist.
1. Atensile loads.
2. Bshear loads.
3. Ctorsion.
123A plate 10 inches by 5 inches is to be riveted with 3 rows of rivets, with the normal 4D rivet spacing and 2 D edge distance. The rivets are AN460AD4-6. How many rivets are required?.
1. A60.
2. B52
3. C56
124A new rivet made of aluminium alloy is.
1. Aanodised with 's'.
2. Banodised with 'x'.
3. Canodised with 'd'.
125What type of heat treatment can be used on DD rivets?.
1. AAnnealing.
2. BPrecipitation.
3. CSolution Treatment.
126Cherrymax and Olympic-Lok rivets.
1. Autilize a pulling tool for installation.
2. Bmay be installed with ordinary hand tools.
3. Cutilize a rivet gun, special rivet set, and bucking bar for installation
127Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the.
1. Aincreased possibility of fretting corrosion in the fastener.
2. Bdifficulty in forming a proper shop head.
3. Cpossibility of causing delamination.
128The dimensions of an MS20430AD-4-8 rivets are.
1. A1/8 inch in diameter and 1/2 inch long.
2. B4/16 inch in diameter and 8/32 inch long.
3. C1/8 inch in diameter and 1/4 inch long.
129 The primary alloying agent of 2024-T36 rivets is indicated by the number.
1. A20
2. B2
3. C24
130Most rivets used in aircraft construction have.
1. Aa raised dot.
2. Bdimples.
3. Csmooth heads without markings
131MS20426AD-6-5 indicates a countersunk rivet which has.
1. Aa shank length of 5/16 inch (excluding head).
2. Ban overall length of 5/16 inch.
3. Ca shank length of 5/32 inch (excluding head).
132Which rivet may be used as received without further treatment?.
1. A2017-T3.
2. B2117-T3.
3. C2024-T4.
133The information on rivet grip length is in which rivet code quadrant?.
1. ANW.
2. BSE
3. CNE
134The NE rivet quadrant gives information on.
1. Adiameter and manufactured head location.
2. Bfastener identity.
3. Chead data.
135A square around the NW digit in the quadrant of a fastner would indicate.
1. Ainterference fit fastener.
2. Bhi-lock to be used.
3. Cfluid tight fastner
136The four quadrants on a quadrant rivet code system are designated.
1. AN, S, E, W.
2. Btop-left, top-right, bottom-left, bottom-right.
3. CNW, NE, SE, SW
137When replacing a hydraulic pipe, where would you find the correct replacement part?.
1. AParts catalogue.
2. BMaintenance schedule.
3. CMaintenance manual
138How are flexible hoses categorised?.
1. ABy maximum pressure.
2. BBy diameter.
3. CBy length.
139What are the rigid pipes on gas turbine engines made from?.
1. AStainless steel.
2. BAluminium alloy.
3. CCopper
140How would you test a hydraulic hose?.
1. APressure test 2.0 * working pressure.
2. BPressure test 1.5 * working pressure.
3. CPressure test 1.0 * working pressure
141To prevent damage to seals on fitment you would.
1. Acompress and stretch them.
2. Buse a cardboard protector over the threaded portions.
3. Cuse grease.
142Flexible pipes are identified by.
1. Alength.
2. Bdiameter.
3. Cmaterial
143A pipe carrying lubricant would be identified by the colour.
1. Awhite.
2. Byellow.
3. Cwhite and yellow.
144Which material is a hydraulic fluid hose made from?.
1. ARubber.
2. BButyl.
3. CTeflon.
145Hydraulic pipes are made from.
1. A1100 or 2020 H14.
2. Bannealed steel.
3. C5056 or 7075.
146The continuous coloured line on a hose assembly.
1. Aidentifies hose material.
2. Bwill assist in detection of any twist in an installed hose.
3. Cidentifies fluid compatibility of hose.
147The storage life of a flexible hose can be up to but not exceeding.
1. A5 years.
2. B2 years.
3. C4 years.
148The markings on a flexible hose must include the.
1. Ainternal bore size.
2. Bmanufacturers name.
3. Cdate of manufacture.
149When fitting a replacement flexible hose.
1. Ause the old one to apply the 'set',
2. Bensure adequate clearance between the hose and the aircraft structure.
3. Calways pressure test before fitting
150MIL-H-5606 hydraulic fluid O-rings are identified with a.
1. Ablue dot.
2. Byellow dot.
3. Cyellow and white dot.
151What type of material would hydraulic pipes on an undercarriage leg or bay be made from?.
1. AStainless steel, annealed, 14H.
2. B7075, H14.
3. C1100, 2024, in half hard state.
152A metal pipe has a small indentation. What are the limits?.
1. A5% internal diameter.
2. B10% of external diameter.
3. CNo dent on a bend.
153An aircraft pipe has a number stamped on it. It is the.
1. Afluid it is carrying.
2. Baircraft system.
3. Cserial number
154The length of a straight hose assembly is measured.
1. Abetween the outer faces of the union nuts.
2. Bbetween the extremities of the two nipples.
3. Calong the coloured line.
155Metal tubing fluid lines are sized by wall thickness and.
1. Aoutside diameter and 1/32 inch increments.
2. Binside diameter and 1/16 inch increments.
3. Coutside diameter and 1/16 inch increments
156A certain amount of slack must be left in a flexible hose during installation because, when under pressure, it.
1. Aexpands in length and contracts in diameter.
2. Bcontracts in length and expands in diameter.
3. Cexpands in length and diameter.
157The term 'cold flow' is generally associated with.
1. Awelding and sheet metal.
2. Brubber hose.
3. Cvaporizing fuel
158Flexible lines must be fitted with a slack.
1. Aof 5 - 8 % of the length.
2. Bof at least 10 - 12 % of the length.
3. Cto allow maximum flexing during operation.
159 The material specifications for a certain aircraft require that a replacement oil line be fabricated from3/4 inch, 0.072 5052-0 aluminium alloy tubing. What is the inside dimension of this tubing?.
1. A0.688 inch.
2. B0.606 inch.
3. C0.750 inch.
160Excessive stress on fluid or pneumatic metal tubing caused by expansion and contraction due to temperature changes can best be avoided by.
1. Aproviding bends in the tubing.
  Option B.        using short, straight sections of tubing between fixed parts of the structure of the aircraft.
  Option C.        not subjecting the aircraft to sudden changes in temperature
2. Busing short, straight sections of tubing between fixed parts of the structure of the aircraft.
3. Cnot subjecting the aircraft to sudden changes in temperature
161Flexible hose used in aircraft systems is classified in size according to the.
1. Aoutside diameter.
2. Binside diameter.
3. Cwall thickness.
162Which tubings have the characteristics (high strength, abrasion resistance) necessary for use in a high pressure (3,000 PSI) hydraulic system for operation of landing gear and flaps?.
1. A1100-1/2H or 3003-1/2H aluminium alloy.
2. BCorrosion resistant steel annealed 1/4H.
3. C2024-T or 5052-0 aluminium alloy
163A gas or fluid line marked with the letters PHDAN.
1. Ais a high pressure line. The letters mean Pressure High, Discharge at Nacelle.
2. Bis carrying a substance which may be dangerous to personnel.
3. Cis carrying a substance which cannot be made non-toxic
164A 3/8 inch aircraft high pressure flexible hose compared to a 3/8 inch metal tubing used in the same system will.
1. Ahave equivalent flow characteristics.
2. Bhave about the same OD.
3. Cusually have interchangeable applications
165How do you assemble a banjo hose?.
1. APut a washer on the outside of the banjo only.
2. BPut a washer on the inside of the banjo only.
3. CPut washer either side of the banjo
166A 0.5 in. diameter pipe is to be joined using standard nuts and fittings. What coupling would you use?.
1. AAN8-8852-1.
2. BAN8-8852-2.
3. CAN8-8852-8.
167To install a flareless coupling.
1. Aturn until torque is felt plus 3 flats (half turn).
2. Bhand tight plus 2 flats.
3. Cturn until torque is felt plus 2 flats
168A Skydrol hydraulic seal would be made of.
1. Abutyl rubber, ethelene propylene or Teflon Phosphate Ester based.
2. Bnatural rubber vegetable based.
3. Csynthetic rubber mineral based
169Adapter nipples are not required on.
1. Apipe to externally coned adapter.
2. Bpipe to pipe coupling.
3. Cpipe to internally coned adapter.
170A butyl rubber seal is made from.
1. Asilicon rubber.
2. Bsynthetic rubber.
3. Clatex natural rubber.
171What is the colour of an AN steel flared-tube fitting?.
1. ABlack.
2. BRed.
3. CBlue.
172A flexible sealing element subject to motion is a.
1. Agasket.
2. Bpacking.
3. Ccompound.
173Coil springs are made from.
1. Acarbon or alloy steels with high working stress.
2. Blow carbon steels with high working stress.
3. Ccarbon or high alloy steels with low working stress.
174What load are spring hooks subjected to?.
1. ABending.
2. BTension.
3. CCompressive.
175Steel music wire is.
1. Aused for lower strength springs.
2. Bmade of high carbon or nickel alloy.
3. Cused for high strength springs and as progressive-rate springs.
176A spring should be inspected for correct.
1. Alength, strength and squareness.
2. Bwidth, strength and squareness.
3. Cwidth, length and strength.
177Needle roller bearings.
1. Acan accept a small amount of misalignment.
2. Bare susceptible to brinelling.
3. Care designed to carry axial loads.
178When rotating a ball bearing by hand, a regular click indicates.
1. Aa cracked ring.
2. B damage to the balls.
3. Cintergranular corrosion in the outer ring
179A journal load is.
1. Acompression.
2. Bradial.
3. Caxial
180What kind of bearing is used in a landing system?.
1. ANeedle roller bearing.
2. BTapered roller bearing.
3. CCaged ball bearing.
181Spherical roller bearings resist what loads?.
1. ALarge radial but no thrust.
2. BLarge radial and moderate thrust.
3. CLarge thrust and moderate radial.
182Where are needle roller bearings used?.
1. AHigh speed operations.
2. BWhere is fluid damped bearing used.
3. CWhere there are space restrictions.
183Loads on tapered roller bearings are.
1. Athrust only.
2. Bradial only.
3. Cradial and thrust.
184A Hardy Spicer coupling has what type of bearings?.
1. ABall Bearings.
2. BNeedle bearings.
3. CPlain bearings.
185A self aligning bearing is a.
1. Aangular bearing.
2. Bprecision bearing.
3. Cradial bearing
186 A crankshaft would be fitted with a.
1. Acylindrical roller bearing.
2. Btaper roller bearing.
3. Cspherical roller bearing
187Where heat is likely to be transmitted through a bearing.
1. Agroup 2 bearings are used.
2. Bgroup 4 bearings are used.
3. Cgroup 3 bearings are used
188Shielded ball bearings are inspected by.
1. Arunning at operating speed and listening for signs of wear.
2. Bdismantling and inspecting.
3. Crotating slowly by hand
189Thrust bearings take.
1. Aradial loads.
2. Bjournal loads.
3. Csideloads
190A single row ball bearing is best suited to accepting.
1. Aradial loads only.
2. Baxial loads only.
3. Caxial and radial Loads.
191Taper roller bearings are used for which of the following purposes?.
1. ATo transmit radial loads whilst resisting axial movement.
2. BTo transmit thrust loads with radial loads.
3. CTo permit axial movement whilst resisting radial load
192The stationary race of a journal bearing is normally.
1. Aa spigoted fit.
2. Ban interference fit.
3. Ca push fit.
193Damage to the shield of a bearing should result in.
1. Ano action.
2. Breplacement of the shield.
3. Crejection of the bearing
194A watermark on a bearing indicates.
1. Abearing running dry.
2. Bintergranular corrosion.
3. Clack of lubrication.
195Needle bearings resist.
1. Aradial and axial load.
2. Baxial load only.
3. Cradial load only
196When silica gel has absorbed moisture the colour changes to.
1. Apink.
2. Bwhite.
3. Cblue.
197Lubrication of roller bearings and needle bearings are.
1. Aat low pressure via a tube.
2. Bunder pressure.
3. Cby hand
198Silica gel is used for moisture control during storage, when serviceable it is coloured.
1. Ablue.
2. Bwhite.
3. Cpink.
199How do you check a chain for elongation?.
1. AApply a load, measure chain and use 5% max formula to check extension.
2. BApply a load, measure chain and use 2% max formula to check extension.
3. CHang the chain under its own weight, measure chain and use 2% max formula to check extension.
200How do you store a chain?.
1. AOiled and coiled in greaseproof paper.
2. BLay uncoiled and flat in greaseproof paper.
3. CHanged so they do not kink.

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Descripción: Test sobre Materiales hadware 3, creado por oriol arrufat el 08/08/2018.
Autor: oriol arrufat
Idioma: English
Visitas: 25
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