1) A purpose of a 'cut-out' in a hydraulic system Report

is to limit loss of fluid in the event of pipe fracture

is to prevent creep in jack operated services which have several selected positions

is to relieve the pump of load when the operation of services is complete and the accumulator charged with fluid

2) Hydraulic pressure can be restored by Report

compressing the air charge in an accumulator

the use of a pressure/heat exchanger

compressing the fluid in a reservoir

3) What is the colour of the band on a hydraulic seal?. Report

Yellow

Green

White

4) A maintainer valve in an hydraulic system will Report

allow continued press to essential systems during times of reduced supply

dampen pressure inputs

maintain a high pressure to all systems

5) Where is the temperature overheat switch located in a hydraulic pump?. Report

In the pressure line

In the suction line

In the case drain

6) What happens if a component has an internal hydraulic leak?. Report

Fluid loss

Increase in fluid pressure

Increase in fluid temperature

7) What happens to hydraulic fluid when it is overheated?. Report

Increase acidity

Increase viscosity

Increase alkalinity

8) How is the hydraulic pump depressurising solenoid actuated? Report

Energised both open and closed depending on cockpit selection

Energised Open

Energised Closed for fail-safe

9) How do you prevent hydraulic fluid frothing? Report

By pressurising

Vent Reservoir to atmosphere

Pass over a tray

10) Accumulators as fitted to aircraft hydraulic systems Report

are only ever used in an emergency

store fluid under pressure

provide additional fluid if leaks occur

11) A Skydrol hydraulic fluid seal would be made of Report

natural rubber

synthetic rubber

butyl rubber, ethylene propylene or Teflon

12) Synthetic hydraulic fluid subjected to overheating is high in Report

acidity

alkalinity

viscosity

13) A normal hydraulic system will Report

show pressure and source of hydraulics

show fluid temperature and quantity

illuminate a light in the cockpit when the system is ready

14) A constant volume hydraulic system uses what to relieve pressure in system when no services are being used? Report

Pressure relief valve

Return line back to pump

ACOV

15) The control of hydraulically powered emergency electrical generator frequency is by Report

restriction valve

angle of swashplate

IDG

16) Hydraulic systems normally operate at Report

1800 PSI

3000 PSI

300 PSI

17) When flushing hydraulic systems Report

flush with methylated spirit

flush with any hydraulic oil

flush with same hydraulic oil

18) When replenishing a hydraulic system Report

use any hydraulic fluid

use any hydraulic fluid made by the same manufacturer

use the same/correct hydraulic fluid

19) When replacing a flexible pipe Report

do a bonding check

tighten only hand tight

use two spanners to stop pipe from twisting

20) How do you remove air from hydraulic fluid?. Report

Vent to atmosphere

Pass through a restriction

Pass over a tray

EASA Questions Module 11 Set 15: Hydraulic Power

Set 1: Theory of flight

Set 2: Airframe Structures

Set 3: Aeroplanes-Fuselage

Set 4: Cabin Pressurisation

Set 5: Instruments

Set 6: Avionic system

Set 7: Avionic system

Set 8: Navigation

Set 9: Electrical Power

Set 10: Electrical System

Set 11: Battery

Set 12: Equip & Furnishing

Set 13: Fire Protection

Set 14: Fuel Systems

Set 15: Hydraulic Power

Set 16: Ice & Rain

Set 17: Flight Controls

Set 18: Flight Controls_1

Set 19: Landing Gear

Set 20: Lights

Set 21: Oxygen

Set 22: Pneumatic

Set 23: Water & Waste