A&P Airframe Systems & Components 5

Question 1

Which component directly regulates cabin pressure in a pressurized aircraft?

Accepted Answer

Outflow valve

Answer

The outflow valve modulates how much air leaves the cabin to hold the scheduled pressure.

Question 2

Cabin differential pressure is the difference between:

Accepted Answer

Cabin pressure and ambient outside pressure

Answer

Differential pressure is cabin pressure minus outside static pressure, limited by structural design.

Question 3

Aviator's breathing oxygen must be low in moisture to prevent:

Accepted Answer

Freezing of valves and regulators at altitude

Answer

Moisture in the oxygen can freeze in cold, high-altitude regulators and block flow.

Question 4

A chemical oxygen generator produces oxygen by:

Accepted Answer

Burning a sodium chlorate core

Answer

Sodium chlorate decomposes when ignited, giving off oxygen.

Question 5

A thermocouple fire detection system responds to:

Accepted Answer

Rate of temperature rise

Answer

The thermocouple's reference junction heats slowly, so a fast rise generates a voltage to the warning circuit.

A&P - Aircraft and Powerplant Certification Practice Test