737 800 ATA21 FD

What does the flow control and shutoff valve (F C S O V) regulate the flow of?

• Hot bleed air

• Ram air

• Cold air

• Nitrogen

What component of the ram air system initiates Built-In Test Equipment (BITE) signals to the forward SRADA?

• Ram air control temperature sensor

• Inlet smart ram air door actuator (SRADA)

• Pack zone temperature controller (P Z T C)

• Ram air inlet modulation panels

What removes some heat from the bleed air before it enters the compressor section of the air cycle machine (A C M)?

• Impeller fan

• Ram air

• Turbine case

• Pneumatic manifold

What is the purpose of the SRADAs during flight with the flaps up?

• To control the airflow through the heat exchangers

• To regulate the flow of hot bleed air

• To prevent ice formation in the condenser

• To increase the pressure and temperature of the bleed air

What does the standby temperature control valve serve as a backup for?

• Regulating the discharge temperature of the air conditioning pack

• Thawing ice in the condenser

• Controlling the airflow through the heat exchangers

• Supplying air to the passenger compartment area

What triggers the amber PACK light and closes the F C S O V in case of an overheat condition?

• All of the above

• Pack discharge overheat switch

• Turbine inlet overheat switch

• Compressor discharge overheat switch

What is the function of the recirculation system?

• To supplement pack air in the distribution system

• To increase the pressure and temperature of the bleed air

• To regulate the flow of hot bleed air

• To control the airflow through the heat exchangers

What component of the recirculation system collects cabin air to supplement pack air in the distribution system?

• Check valves

• Collector shroud

• Fans

• Air filters

What activates the recirculation fan?

• Moving the RECIRC FAN switches to the HIGH position

• Moving the RECIRC FAN switches to the AUTO position

• Turning on the air conditioning pack

• Increasing the pressure and temperature of the bleed air

What is the purpose of the pack zone temperature controller (P Z T C)?

• To adjust the temperature control valve (T C V)

• To initiate Built-In Test Equipment (BITE) signals to the forward SRADA

• To maintain the desired pack output temperature

• To regulate the discharge temperature of the air conditioning pack