Air Conditioning

Question 1

Overheating of the air conditioning pack results in a:

• Close command to the nacelle shut-off valves shutting off both bleed systems
• Warning light requiring crew action
• Cold signal to the cabin temperature control valves
• Cold signal to the flight compartment temperature trim valves

Answer 1

• Close command to the nacelle shut-off valves shutting off both bleed systems

Question 2

A CABIN DUCT HOT caution light results in a:

• Cold command to the flight compartment and cabin temperature controllers
• Close command to the HP shutoff valves
• Cold command to the cabin temperature controller
• Close command to the pressure regulator/shutoff valves

Answer 2

• Cold command to the cabin temperature controller

Question 3

The avionics compartment fan operates when:

• DC power is applied to the aircraft
• LOW LEVEL VENTS lever is at OPEN
• WOW system is in the ground mode
• Avionics compartment temperature reaches 40°c

Answer 3

• DC power is applied to the aircraft

Question 4

The normal source of air conditioning is supplied from the:
(There may be more than one correct response)
- Deicer duct
- Cabin recirculating fan
- HP compressors
- LP compressors

Answer 4

• Cabin recirculating fan
• HP compressors
• LP compressors

Question 5

The heat exchanger cooling airflow during flight is supplied from the:

• Recirculated cabin air
• Flight compartment recirculating fan
• Ram-air inlets
• Cooling turbine

Answer 5

• Ram-air inlets