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Module 6 > Pipes And Unions > Flashcards

Pipes And Unions Flashcards

1
Q

How are flexible hoses categorised?

A

By maximum pressure

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2
Q

What are the rigid pipes on gas turbine engines made from?

A

Stainless steel

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3
Q

How would you test a hydraulic hose?

A

Pressure test 1.5 * working pressure

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4
Q

To prevent damage to seals on fitment you would

A

Use a cardboard protector over e threaded portions

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5
Q

Flexible lines are identified by

A

Material

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6
Q

A pipe carrying lubricant would be identified by the colour

A

Yellow

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7
Q

Which material is a hydraulic fluid hose made from?

A

Teflon

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8
Q

Hydraulic pipes are made from

A

Annealed steel

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9
Q

The continuous coloured line on a hose assembly

A

Will assist in detection of any twist in an installed hose

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10
Q

When fitting a replacement flexible hose

A

Ensure adequate clearance between the hose and the aircraft structure

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11
Q

MIL-H-5606 hydraulic fluid O-rings are identified with a

A

Blue dot

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12
Q

A metal pipe has a small indentation. What are the limits?

A

No dent on a bend

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13
Q

An aircraft pipe has a number stamped on it. It is the

A

Serial number

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14
Q

The length of a straight hose assembly is measured

A

Between the extremities of the two nipples

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15
Q

Metal tubing fluid lines are sized by wall thickness and

A

Outside diameter and 1/16 inch increments

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16
Q

A certain amount of slack must be left in a flexible hose during installation because, when under pressure it

A

Contracts in length and expands in diameter

17
Q

The term ‘cold flow’ is generally associated with

A

Rubber hose

18
Q

Flexible lines must be fitted with a slack

A

Of 5-8% of the length

19
Q

The material specifications for a certain aircraft require that a replacement oil line be fabricated from 3/4 inch, 0.072 5052-0 aluminium alloy tubing. What is the inside dimension of this tubing?

A

0.606 inch

20
Q

Excessive stress on fluid or pneumatic metal tubing caused by expansion and contraction due to temperature changes can best be avoided by

A

Using short, straight sections of tubing between fixed parts or the structure of the aircraft
OR
Providing bends in the tubing

21
Q

Flexible hose used in aircraft systems is classified in size according to the

A

Inside diameter

22
Q

Which tubing have the characteristics (high strength, abrasion resistance) necessary for the use in a high pressure (3,000 PSI) hydraulic system for operation of landing gear and flaps?

A

Corrosion resistant steel annealed 1/4H

23
Q

A gas or fluid line marked with the letters PHDAN

A

Is carrying a substance which may be dangerous to personnel

24
Q

A 3/8 inch aircraft high pressure flexible hose compared to a 3/8 inch metal tubing used in the same system will

A

Have equivalent flow characteristics

25
Q

How do you assemble a banjo hose?

A

Put washer either side of the banjo

26
Q

To install a flareless coupling

A

Turn until torque is felt plus 2 flats

27
Q

In most aircraft hydraulic systems, two-piece tube connectors consisting of a sleeve and a nut used when a tubing flare is required. The use of this type of connector eliminates

A

The possibility of reducing the flare thickness by wiping or ironing during the tightening process

28
Q

Adaptor nipples are not required on

A

Pipe to externally coned adaptor

29
Q

A butyl rubber seal is made from

A

Synthetic rubber

30
Q

What is the colour of an AN steel flared-tube fitting?

A

Black

31
Q

Which statement about military standard (MS) fitting is correct?

A

MS flareless fittings must be tightened to a specific torque
OR
During installation MS flareless fittings are normally tightened by turning the nut a specified amount after the sleeve and fitting sealing surface have made contact, rather than being torqued

32
Q

A flexible sealing element subject to motion is a

A

Packing

33
Q

When replacing a hydraulic pipe, where would you find the correct replacement part?

A

Parts catalogue

Module 6 (14 decks)

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