3-42.
What is the automatic time-out
(time-delay) circuit used to
prevent in most radar sets?
1.
Power application to the
filaments
2.
Power application to the
high-voltage sections prior to
proper warm-up time
3.
Radar transmission until
airborne
4.
Personnel injury during radar
maintenance
3-43.
During the search mode of
operation, which of the following
functions is NOT available?
1.
Selectable range marks
2.
Horizon antenna scan
3.
Manual antenna control
4.
Operable B-scope
3-44.
In the fire control mode. operation
is limited to what minimum range in
yards?
1.
40,000
2.
20,000
3.
3,500
4.
2,500
3-45.
Which of the following functions is
NOT available in the bomb director
mode?
1.
PPI display
2.
Controllable range and azimuth
marks
3.
Depressed-center sector scan
4.
Operating ranges same as the
search mode
3-46.
The basic controls of the 11D13A
are grouped into what total number
of major categories?
1.
Five
2. Two
3.
Six
4.
Four
3-47.
The standby position of the 11D13A
power switch applies which of the
following types of power to the
system?
1.
Filament power only
2.
Keep alive voltage to the TR
tubes only
3.
Filament power and keep alive
voltage to the TR tubes
4.
High voltage power to the
varactor
3-48.
The mode switch of the 11D13A
selects one of the submodes of
operation.
1.
True
2.
False
3-49.
What component of the 11D13A allows
the operator to select manual
search operation?
1.
Antenna control
2.
Mode switch
3.
Receiver gain
4.
Power selector
3-50.
With the 11D13A in the basic search
mode, what type of display is
presented?
1.
Depressed-center PPI
2.
A-scope
3.
B-scope
4.
PPI
3-51.
With the 11D13A in the automatic
search mode, which of the following
indicators will display
information?
1.
A-scope and B-scope
2.
A-scope and PPI
3.
B-scope and PPI
4.
B-scope and depressed-center
PPI
3-52.
Which of the following items causes
the “jizzle” on the display in a
fire control radar set during the
automatic search mode of operation?
1.
Antenna nutation
2.
Antenna beamwidth
3.
Acquisition marks
4.
Target return
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