QUESTION PAPER
MODULE: 6 (Pipes and Unions)
Q. SL MULTIPLE CHOICE QUESTION LEVEL REFERENCE
NO.
BOOK AUTHOR PAGE
NAME NO.
Aircraft fluid lines are usually made of
1)metal tubing 2)flexible hose 1
1. 3)both 1 and 2 4)NOTA EASA 6.2
Fluid lines were widely used for
1)fuel 2)coolant 1 EASA 6.2
2. 3)air 4)AOTA
Flexible hose is generally used in
1)moving parts 2)vibration area 1 EASA 6.2
3. 3)fixed region 4)both 1 and 2
Tubing made from 1100 H14 (1/2-hard) or 3003 H14
(1/2-hard) aluminum alloy is used for 6.2
1)low pressure 2)high pressure
4. 1 EASA
3)medium pressure 4)AOTA
Tubing made from 2024-T3, 5052- O, and 6061-T6
aluminum alloy materials is used in
1)low pressure 2)high pressure 1
5. 3)medium pressure 4)both 1 and 3 EASA 6.2
Corrosion resistant steel tubing, either annealed CRES
6. 304, CRES 321 or CRES 304-1/8-hard, is used for 1 EASA 6.2
1)high pressure hydraulic system
2) high pressure pneumatic system
3)both 1 and 2 4)NOTA
If a freshly formed titanium surface is exposed in
gaseous oxygen , then EASA 6.2
1)ice formation will be there
7. 2
2)spontaneous combustion will occur
3)water droplet will be formed
4)AOTA
On large aluminum alloy tubing, the alloy designation
is EASA 6.2
08. 1)stamped on the surface 2)color code is usede
1
3)name written on surface 4)NOTA
If the code markings were hard to read on pipes then
what will you do ?
UAE STD.DOC/TRG/APP-31
09. 1)hardness testing 2)malleability testing 3
3)hydraulic testing 4)nothing EASA
6.3
The beaded type of fitting, which requires a bead and a 6.4
section of hose and hose clamps, is used only in EASA
10. 1)low pressure 2)low or medium pressure 2
3)medium pressure 4)AOTA
A flared tube fitting consists of 6.4
1)a sleeve 2) a nut
11. 3)both 1 and 2 4)NOTA 1
EASA
Fitting combinations composed of different alloys 6.7
should be avoided to prevent EASA
1)metal crack 2)corrosion
12. 3)toughness 4)brittleness 1
13. Flareless fittings are designed primarily for 1 EASA 6.5
1)high pressure (3000 psi) 2)both 1 and 3
3)severe vibratipon condition 4)NOTA
14. Flare less tube assemblies of aluminum alloy have a 1 EASA 6.5
sleeve pilot which should have maximum clearance of
1)0.005” 2)0.004”
3)whatever 4)I don’t know
15. Swaged fittings and cryofit fittings are used to join 3 EASA 6.7
hydraulic lines where
1)routine checkup needed 2)both 1 and 3
3)routine disconnection are not required 3)NOTA
16. Permalite is tube fitting that is mechanically attached 1 EASA 6.7
to the tube by
1)axial swaging 2)trans swaging
3)radial swaging 4)AOTA
17. cryofit fittings sleeve is made of a 2 EASA 6.7
1)shape memory alloy, Tinel™. 2)non ferrous alloy
3)molybdenum steel 4)high carbon steel
18. cryofit fittings were frozen in ? 1 EASA 6.7
1)ice 2)liquid nitrogen 3)refrigerator 4)AOTA
19. Teflon™ is the DuPont trade name for 1 EASA 6.9
1)tetrafluoroethylene resin 2)teflynmethol
3) tetrafluoromethylene resin 4)NOTA
UAE STD.DOC/TRG/APP-31
20. Teflon hose has 2 EASA 6.9
1)unlimited storage time
2)greater operating temperature range
3)broad usage for various kind of fluid
4)AOTA
21. Which of the following is not used for flexible fluid line 2 EASA 6.8
construction?
1)Teflon 2)pure rubber 3)BUNA-N 4)AOTA
22. Example of synthetic rubber are 1 EASA 6.8
1)buna-N 2)neoprene 3)butyl 4)AOTA
23. Buna-N is a synthetic rubber compound which has 1 EASA 6.8
excellent resistance to
1) petroleum products 2)human excretion
3)air 4)oxygen
24. which is a synthetic rubber compound which has an 1 EASA 6.8
acetylene base
1)Buna-N 2)neoprene 3)Teflon 4)NOTA
25. Butyl is a synthetic rubber compound made from 1 EASA 6.9
1)coal 2)petroleum raw materials
3)leather 4)NOTA
26. On lines 4" in diameter (or larger), lines in oily 2 EASA 6.10
environment, hot lines, and on some cold lines, which
tags may be used in place of tape or decals?
1)plastic 2)steel 3)Teflon 4)aluminum
27. Fuel line is marked with which color code 1 EASA 6.11
1)black 2)yellow 3)red 4)blue
28. Coolant line is marked with which color code 1 EASA 6.11
1)black 2)yellow 3)red 4)blue
29. Lines conveying fuel may be marked as 2 EASA 6.10
a)FIRE b)FLAM c)TOXIC d)NONE
30. Lines containing physically dangerous materials, such 1 EASA 6.10
as oxygen, nitrogen, or Freon™, may be marked
a)PHDAN b)FLAM c)NONE d)BDGF
31. …………..is used on lines in engine compartments, EASA 6.10
where there is the possibility of tapes, decals, or tags 1
being drawn into the engine induction system.
a)shield b)paint c)both a and b d)nothing
UAE STD.DOC/TRG/APP-31
