Pressurization Systems: DGCA Technical General questions

Question 1

A cabin humidifier is used:

Accepted Answer

At high altitude

Answer

On the ground in conditions of low relative humidity

Answer

At low altitude

Answer

On the ground in high ambient temperatures

Question 2

Maximum differential pressure:

Accepted Answer

Is the maximum authorized pressure difference between the inside of the fuselage and the atmospheric ambient pressure

Answer

Is the absolute pressure provided by the vacuum pump

Answer

Is the pressure loss over a given time limit

Answer

Is the absolute pressure the cabin pressure ducting is designed to carry

Question 3

If pressure is manually controlled:

Accepted Answer

Care should be taken to ensure climb/descent rates are safe

Answer

An extra member is required to monitor system operation

Answer

The climb rate would be maintained automatically

Answer

Climb rate could not be maintained

Question 4

An aircraft is prevented from pressurizing on the ground by:

Accepted Answer

Inhibiting microswitches on the landing gear

Answer

The auto deflating valve on the main oleos

Answer

Inhibiting microswitches on the throttles

Answer

The pressure control master switch

Question 5

The aircraft inhibiting switch connected to the A/C landing gear:

Accepted Answer

Stops pressurizing on the ground and ensures that there is no significant pressure differential

Answer

Allows the aircraft to be pressurized on the ground

Answer

Ensures that the discharge valve is closed

Answer

Cancels out the safety valve on the ground

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