Chapter 6, Flight-deck Audio Systems Flashcards
Audio selector panels are located
Close to the pilot and first officer stations
When are the flight-deck speaker units
muted?
When a PTT switch is operated
Input to the captain’s interphone speaker unit
is derived from
The audio selector panel
The microphone PTT system is interlocked in
order to prevent
More than one switch being operated at any time
Bulk erasure of the magnetic tape media used in a CVR is usually carried out
On the ground with the parking brake set
The typical bias frequency used in a magnetic CVR is
65 kHz
The typical frequency emitted by a ULB is
37.5 kHz
Which one of the following is a suitable audio tone frequency for testing a CVR?
600 Hz
A ULB is activated
Automatically when immersed in water
The CVR flight deck area microphone is usually mounted
On the overhead panel
The typical pulse rate for a ULB is
0.9 pulses per sec
The CVR is usually located
In the ceiling of the aft passenger cabin
What colour is used for the external housing
of a CVR?
Orange
A ULB usually comprises
A separate externally fitted canister
A ULB will operate
In either saltwater or freshwater
