1) In a turbo compressor air conditioning system (bootstrap system) the supply of air behind the primary heat exchanger is Report

passed across an expansion turbine, compressed and then passed through a heat exchanger.

passed across an expansion turbine, then directly to the heat exchanger. 

compressed, passed through a heat exchanger, and then across an expansion turbine.

2) The temperature within the aircraft cabin is normally maintained at Report

20 ⁰C to 24 ⁰C

12 ⁰C to 18 ⁰C

18 ⁰C to 24 ⁰C

3) What supplies warm air to the cabin in a Bleed Air air-conditioning system? Report

The gas turbine exhaust

The engine exhaust heat

The compressor of the gas turbine engine

4) The cabin altitude is Report

the actual height of the aircraft above sea level

the equivalent height of the aircraft above sea level

the difference between cabin pressure and atmospheric pressure

5) When the aircraft is flying at 30000 ft and the cabin altitude reads zero, then the pressure inside the cabin is Report

equivalent to that of sea level pressure

higher than that of sea level pressure

less than that of sea level pressure

6) The cabin differential pressure is Report

the difference between cabin pressure and atmospheric pressure

the equivalent height of the aircraft above sea level

the actual height of the aircraft above sea level

7) What device regulates the outflow of air from the cabin? Report

The outflow valves

The vent valves

The dump control valves

8) When air is pressurized, the oxygen content as mass per unit volume Report

increases

decreases

remains constant

9) In a 'bootstrap' cooling system the supply of air is first Report

Passed across an expansion turbine, then compressed and passed through a heat exchanger

Compressed, then passed through a heat exchanger and across an expansion turbine

Passes across an expansion turbine, then directly to the heat exchanger

10) An altitude of 8000 feet is selected on the cabin pressure controller with maximum cabin pressure differential is not exceeded Report

sea level cabin conditions will be maintained to 8000 feet aircraft altitude.

8000 feet cabin conditions will be maintained at aircraft altitudes above 8000 feet

8000 feet cabin conditions will be maintained at all aircraft altitudes from sea level

11) If cabin pressure is increasing, the cabin rate of change indicator will show Report

zero, provided the rate of change is within the normally accepted limits

a rate of climb

a rate of descent.

12) What device prevent the ?negative differential pressure? of cabin? Report

a blow off valve

a spill valve

an inward relief valve

13) During a normal climb from aerodrome level with the pressurization system 'ON' Report

The cabin differential pressure is maintained constant

the atmospheric pressure decreases more quickly than the cabin pressure

the pressurization system does not control pressure until 10,000 ft is reached

14) The inward relief valve is usually set to operate at a cabin differential of Report

+ 0.5 PSI.

- 0.5 PSI

+ 9.25 PSI.

15) The humidity within a passenger cabin Report

should not be greater than 40%.

should be between 30% and 70%.

should not be less than 60%.

16) Air cycle machine employs what principle to produce cold air? Report

by compression of ambient air across a turbine.

by surface heat exchange in the C.A.U.

conversion of heat energy to mechanical energy in the C.A.U.

17) Rate of change of cabin pressure is Report

selected by the pilot and controlled by the pressure controller.

selected by the pilot and controlled by the spill valve.

automatic

18) An aircraft has a maximum differential pressure of 8.5 PSI at cruising altitude. If the ambient pressure is 2.9 PSI, the pressure inside the cabin at cruising altitude would be Report

11.4 PSI

5.6 psi

8.5 psi

19) Before filling a vapour cycle cooling system Report

flush the system with a solvent.

apply suction to remove air and moisture.

pre-heat the system to 100 sup>0F

20) Cabin differential is determined only by Report

the selected cabin height.

the height at which the aircraft is flying.

the height at which the aircraft is flying and by the selected cabin height.

EASA Questions Module 11 Set 4: Cabin Pressurisation

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