Pressurization 08

Question 1

Cabin altitude in pressurised flight is:

a.The altitude at which cabin pressure equals ambient pressure.

b.The altitude corresponding to the cabin pressure regardless of aircraft height

c.Is displayed on the second needle of the aircraft altimeters.

d.Always 8000ft.

Answer 1

b.The altitude corresponding to the cabin pressure regardless of aircraft height

Question 2

Cabin differential pressure means the pressure difference between:

a.flight deck and passenger cabin.

b.actual cabin pressure and selected pressure.

c.cabin pressure on an ISA day.

d.cabin pressure and ambient pressure.

Answer 2

d.cabin pressure and ambient pressure.

Question 3

During a normal pressurised climb after take-off the:

a.cabin pressure decreases at a rate not exceeding 500ft/min in normal operations.

b.cabin pressure is maintained constant.

c.cabin does not start pressurising until 20,000ft is reached.

d.cabin pressure increases at 500ft/min

Answer 3

a.cabin pressure decreases at a rate not exceeding 500ft/min in normal operations.

Question 4

The pressurisation system works by:

a.essentially constant input mass flow and variable output.

b.supplying hot gases from the engine exhaust pipe to the mass flow control system.

c.essentially constant output mass flow and variable input.

d.does not start until an altitude of 8000ft has been reached.

Answer 4

c.essentially constant output mass flow and variable input.

Question 5

An aircraft climbs from sea level to 16000ft at 1000ft/min, the cabin pressurisation is set to climb at 500ft/min to a cabin altitude of 8000ft. The time taken for the cabin to reach 8000ft is:

a.Twice the time it takes the aircraft to reach 16000ft.

b.The same time it takes the aircraft to reach 16000ft

c.Three times the time it takes the aircraft to reach 16000ft.

d.Half the time it takes the aircraft to reach 16000ft.

Answer 5

b.The same time it takes the aircraft to reach 16000ft

Question 6

What component in the pressurisation system normally controls the max differential:

a.the first officer.

b.the inward relief safety valve.

c.the outward relief safety valve.

d.the cabin pressure controller.

Answer 6

d.the cabin pressure controller.

Question 7

How many pressure controllers are there:

Answer 7

Two

Question 8

The purpose of a ditching valve is to:

a.direct pressure to the floatation bags.

b.achieve rapid depressurisation.

c.close the outflow valve(s) to prevent the ingress of water on ditching.

d.open the outflow valve(s) to allow the differential to be reduced

Answer 8

c.close the outflow valve(s) to prevent the ingress of water on ditching.

Question 9

What is the purpose of the dump valve:

a.to dump fuel.

b.to ensure the aircraft remains pressurised on the ground.

c.is operated by the cabin crew.

d.to allow the crew to dump all pressure in an emergency

Answer 9

d.to allow the crew to dump all pressure in an emergency

Question 10

If all aircraft packs are switched off, the aircraft will pressurise during flight

Select one:
True
False

Answer 10

False