What is one of the main objectives of a military aircraft design?

A)
Low RCS
B)
High RCS
C)
High heat signature
D)
Highly stable configuration

Correct Answer :   Low RCS

Explanation : Military aircraft usually wish to have a very low RCS or radar cross section so that they are stealthy and undetectable on the enemy’s primary radar. RCS can be reduced by various methods like using radar energy absorbing materials on the surface of the aircraft and not having sharp corners on the aircraft which are more likely to reflect radio energy back to the radar antenna.

Recently Updated in Avionics Questions
What is the range of typical weather radar?
A)
5 nmi
B)
50 nmi
C)
200 nmi
D)
500 nmi

Correct Answer : Option (C) :   200 nmi

Explanation : The use of airborne weather radar is one method of storm avoidance. A weather radar system can show centers at a distance of up to 200 nmi.

What is the frequency of operation of weather radar?
A)
500 kHz
B)
548 kHz
C)
1000 MHz
D)
9375 MHz

Correct Answer : Option (D) :   9375 MHz

Explanation : The weather radar operates at a frequency of 9375 MHz, corresponding to a wavelength of 3 cm. This small wavelength gets easily reflected from clouds containing high water concentrations.

What is the gain required by a weather radar antenna?
A)
5 dB
B)
25 dB
C)
50 dB
D)
65 dB

Correct Answer : Option (B) :   25 dB

Explanation : The signal strength of echoes from storms located at a distance from the aircraft is very low, which requires the transmitter to operate at very high power levels and that the antenna have a gain of more than 25 dB.

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