A、The extract fan
B、The Pressure Reglating Valve
C、The siolation valves and the extraction fan
答案：C
A、The extract fan
B、The Pressure Reglating Valve
C、The siolation valves and the extraction fan
答案：C
A. GEN 1 supplies AC BUS 1 and EXT PWR supplies AC BUS 2.
B. APU GEN supplies AC BUS 1 and EXT PWR supplies AC BUS 2.
C. EXT PWR supplies AC BUS 1 and GEN 2 supplies AC BUS 2.
A. In mode 2A, with flaps down or in the glide slope beam.
B. In mode 2B, with flaps down and in the glide slope beam.
C. In mode 2A, with flaps not down and not in the glide slope beam.
A. The altitude scale goes out of view.
B. A red ALT flag is displayed.
C. A and B.
A. On the torque shafts.
B. On the actuators.
C. On the PCU output shaft.
A. Yes.
B. No.
A. Two FQICs and two FLSCUs.
B. One FQIC and two FLSCUs.
C. One FQIC and One FLSCU.
A. The emergency lighting battery only.
B. The emergency lighting system only.
C. The emergency lighting battery and the emergency lighting system.
A. The autopilot is engaged.
B. LAND mode is armed or active.
C. An ILS frequency is autotuned.
A. Air (vent), water, hydraulic and fuel.
B. Water and fuel.
C. Hydraulic and fuel.
A. To prevent door opening if pressure is <3000 psi.
B. To lock the selector in the OPEN/CLOSE position until the actuator is fully opened/retracted.
C. To ensure correct pressure in the extension chamber of the actuators before closing.
