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Radar mixed Primary & Secondary Flashcards | StudBud
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Radar mixed Primary & Secondary
Radar mixed Primary & Secondary
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multi choice basic Radar principles revision questions
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25 cards
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Practice quiz
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Questions
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Answers
1
Which 4 elements form the Radar Power Triangle?
PP, MP, PRF PD
PRF, PS, PD, MP
MP, PP, PS, PD
PP, MP, PD, PS
2
P2 is a side lobe suppression pulse applicable to which mode of IFF
Mode S
Mode 4
Mode 5
Mode 3/A
3
Which following Radar LRU generates the RF output?
Transmitter
Transmitter Antenna
Receiver Antenna
Control & Display Unit
4
Pulse compression and expansion allows a radar to what?
Increase resolution and range
Increase resolution, and accuracy at long ranges.
Increase Range and Accuracy
Increase accuracy and resolution
5
In a Reflex Klystron what electron phenomena causes cavity oscillations to be maintained?
Repelling
Catching
Streaming
Bunching
6
The local Oscillator frequency arrives in which arm to the Magic T mixer?
A
D
B
C
7
A return echo from a target arrives at the Rx Antenna 13μS after Tx, what is the target range.
950 m
19.5 Km
195.0 m
1.95 Km
8
20.3μS is the spacing time between which IFF pulses
Mode C P1 to P3 pulses
Mode 4 Processing delay time
Mode 1,2,3A/C F1 to F2 pulses
Mode S P1 to P5
9
On an AESA antenna, which of the following statements is incorrect?
Each Module has its own Tx/Rx.
The antenna can function with up to 10% module loss.
Has up to 30 times more radar capacity?
The Antenna is mechanically steered.
10
What makes up a pulsed radar Composite Video Signal?
Ref Sweep, Raw Video, Range rings, Heading Marker.
Raw Video, Range Rings, Negative Sweep
Positive Sweep, Range Rings, Raw Video
Heading Marker, Range Rings, Raw Video
11
Which of the following is not a type of Ground Clutter?
Mountain Range Clutter
Main Beam Clutter
Side Lobe Clutter
Altitude return
12
Which of the following is not part of a pulsed radar transmitter?
Charging Choke
Pulse Forming Network
Silicon Control Relay
High Voltage Supply
13
Which Component makes use of a Keep Alive Electrode?
Duplexer
Magic T
T-R Cell
Magnetron
14
How is Velocity Ambiguity overcome?
Decreased PRF
Increased Pulse Duration
Decreased Pulse Duration
Increased PRF
15
Which of the following is a Primary Radar?
I-Band Transponder
IFF
Mode 4
Pulsed Doppler
16
The IFF radio transmission fail code is what?
7500
7600
7700
2000
17
Which type of Indicator is most commonly used in a fighter aircraft?
A-Scope
B-Scope
C-Scope
Sector PPI
18
The Frequency of I-band reply Transmissions is?
1030 Mhz
9190 Mhz
9310 Mhz
1090 Mhz
19
Which of the following is not an example of Internal Noise to a receiver?
Thermal Noise
Cosmic Noise
Hum
Contact Noise
20
Signal Integration helps overcome what?
Second Time Round Echos
Clutter
Jamming
High noise to Signal Ratio
21
A radar Tx has a PD of 0.6μs and a PRF of 500Hz. What is the Duty Factor?
0.0003
0.00006
0.00003
0.000006
22
What is the purpose of the Exciter in a Pulsed Doppler Radar?
Create the required waveform
Excite the antenna ready for propagation.
Amplify the radar signal
Select the Radar mode
23
What is the Pulse spacing duration for P1 & P3 in Mode3/A SIFF.?
3μS
21μS
8μS
5μS
24
What effect does increasing the Pulse Spacing have on the PRF?
Decreases the Frequency
Increases the Frequency
Increases Power
Decreases Peak Power
25
A/C at 200mph Rx a radar echo from an A/C flying ahead at 180mph, same direction. Frequency is?
Higher than the TX frequency
The same as the Tx frequency
Lower than the Tx frequency
Shaped like an onion
