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

Parts catalogue

Maintenance schedule

Maintenance manual

2) How are flexible hoses categorised? Report

By length

By diameter

By maximum pressure

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

Stainless steel

Aluminium alloy

Copper

4) How would you test a hydraulic hose? Report

Pressure test 2.0 * working pressure

Pressure test 1.5 * working pressure

Pressure test 1.0 * working pressure

5) To prevent damage to seals on fitment you would Report

compress and stretch them

use a cardboard protector over the threaded portions

use grease

6) Flexible pipes are identified by Report

length

diameter

material

7) A pipe carrying lubricant would be identified by the colour Report

white

yellow

white and yellow

8) Hydraulic fluid hose is made from which material? Report

Rubber

Butyl

Teflon

9) Hydraulic pipes are made from Report

1100 or 2020 H14

annealed steel

5056 or 7075

10) The continuous coloured line on a hose assembly Report

Identifies hose material

Identifies fluid compatibility of hose

Will assist in detection of any twist in an installed hose

11) The storage life of a flexible hose can be up to but not exceeding Report

2 years

4 years

5 years

12) The markings on a flexible hose must include the Report

internal bore size

manufacturers name

date of manufacture

13) When fitting a replacement flexible hose Report

use the old one to apply the 'set'

ensure adequate clearance between the hose and the aircraft structure

always pressure test before fitting

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

blue dot

yellow dot.

yellow and white dot.

15) What type of material would hydraulic pipes on an undercarriage leg or bay be made from? Report

Stainless steel, annealed, 14H

7075, H14

1100, 2024, in half hard state

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

5% internal diameter

10% of external diameter

No dent on a bend

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

fluid it is carrying

aircraft system

serial number

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

fluid it is carrying

aircraft system

serial number

19) The length of a straight hose assembly is measured Report

between the outer faces of the union nuts

between the extremities of the two nipples

along the coloured line

20) Metal tubing fluid lines are sized by wall thickness and Report

outside diameter and 1/32 inch increments

inside diameter and 1/16 inch increments

outside diameter and 1/16 inch increments

EASA Questions Module 6: Materials Set 12: Pipes And Unions

Set 1: Materials - Ferrous

Set 2: Materials - Ferrous

Set 3: Materials - Non-Ferrous

Set 4: Composite & Non-Metal

Set 5: Wooden Structures

Set 6: Fabric Covering

Set 7: Corrosion

Set 8: Screw Threads

Set 9: Bolts, studs & screws

Set 10: Locking devices

Set 11: Rivets

Set 12: Pipes and Unions

Set 13: Bearings

Set 14: Transmissions

Set 15: Control Cables

Set 16: Electrical Cables