M6.6

Question 1

Pressures over 1500 PSI (105 bar)?

Answer 1

High

Question 2

Under 1500 PSI (105 bar)?

Answer 2

Medium

Question 3

Suction and return lines?

Answer 3

• low pressure lines

Question 4

A flared tube consists of?

Answer 4

• Sleeve
• Flared nut

Question 5

Aircraft fittings have a flare angle of?

Answer 5

37*

Question 6

Flared tube fittings are identified by either?

Answer 6

• AN army & navy (blue/black)
• AC air cops (grey/yellow)

Question 7

Size of rigid tubing is determined by?

Answer 7

-outside diameter in increments of 1/8inch
-part numbers marked in 1/16 inch increments

Question 8

Why is double flare better than single flare?

Answer 8

• smoother
• more concentric
• provides better seal
• more durable
• resistant to shearing effect of torque

Question 9

What are flared-tube fittings made of?

Answer 9

• aluminium alloy
• steel
• copper-based alloys

Question 10

What are flareless tubes?

Answer 10

-attach 2 sections of pipe together which would have ferrules or a sleeve
-when tightened, ferrule/sleeve is compressed between nut
-creates a strong leak free joint

Question 11

Fitting consists of 3 parts?

Answer 11

-Tube
-Sleeve
-nut

Question 12

What is a swaged fitting?

Answer 12

• permanent connection that is maintenance free
  -used where routine disconnections are not required

Question 13

What are permalite fittings?

Answer 13

-deforming fitting into the tube that is joined by moving a ring/component axially.

Question 14

Why would you use a flexible fluid line?

Answer 14

-vibration
-moving parts

Question 15

What are the 4 synthetic compounds used in the construction of the inner liner?

Answer 15

-Neoprene
-Buna-N
-Butyl
-Teflon

Question 16

Neoprene is suitable for?

Answer 16

Petroleum-based fluids

Question 17

Buna-N is suitable for?

Answer 17

-Petroleum based products (better than neoprene)

Question 18

Butyl is suitable for?

Answer 18

Phosphate ester-base hydraulic fluids (e.g. skydrol)

Question 19

Teflon is suitable for?

Answer 19

-compatible with nearly every liquid used
- Broad temp range (-240c to 240c)

Question 20

Size of flexible hose is determined by?

Answer 20

-inside diameter and measured in increments of 1/16 inch

Question 21

Up to 4000kPa (600psi) on a flexible hose?

Answer 21

Low pressure

Question 22

Up to 20000kPa (3000psi) on a flexible hose?

Answer 22

• medium pressure

Question 23

Over 20000kPa (3000psi) on a flexible hose?

Answer 23

High pressure

Question 24

Can you re-use swaged fittings?

Answer 24

No

Question 25

Is it a requirement that open ends of fittings are covered during fluid line disconnections?

Answer 25

True

Question 26

What are swivel fittings?

Answer 26

-Allows coupling and hose connection to rotate (flexibility)
-prevents twisting and excessive bending

Question 27

Advantage of a quick disconnect coupling?

Answer 27

• one hand operation
• quick to operate
  -help eliminate vapour loss + other hazards

Question 28

What are Gamah couplings?

Answer 28

• lightweight and flexible couplings for aerospace fuel, environmental control, water, waste and oxygen systems

Question 29

What are v-retainer couplings?

Answer 29

• connect ducting, tubing and other components in high temp and high pneumatic pressure areas

Question 30

Advantages of v-retainer couplings?

Answer 30

-inexpensive
- fasten with only 1 or 2 bolts

Question 31

What are the 2 types of v-couplings?

Answer 31

• V-bands
• v-retainers

Question 32

What are worm gear hose clamps (jubilee clips)?

Answer 32

• clamps that secure a hose while remaining connected to a fitting

Question 33

Pre made pipe identification are marked with: (T or F)
- part number
- drawing number
- Inspection stamp
- test stamp
- date of manufacturer

Question 34

How are flared tubings identified?

Answer 34

• AN - army/navy
• AC - Air Corps