The automation selection of navigation frequencies is made by:

A. Fire panel.

B. External power control panel.

C. APU control panel.

A. System control and monitoring and fault reporting.

B. System control and monitoring.

C. Fault reporting.

A. To centralize all the audio signals and the frequencies of the communication systems.

B. To act as an interface between the users and the various radio communication and radio navigation systems.

C. To receive audio signals only.

A. On ground only.

B. On ground and in flight.

C. In flight only.

A. The Electronic Control Box.

B. The Ignition Exciter Unit.

C. The Start Contactor.

A. ± 6 degrees.

B. ± 74 degrees.

C. ± 95 degrees.

A. The bleed temperature sensor

B. The compressor overheat sensor

C. The compressor pneumatic overheat sensor

A. By 26 V AC.

B. By 28 V DC.

C. By 115 V AC.

A. From PTP.

B. From test pushbutton of the CU.

C. Both.

A. The failed WHC connects to the other.

B. Both systems are lost.

C. The heating of the related side is lost.