Related Questions

A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be
A A decrease in range
B A reduction in horizontal resolution
C No noticeable effect
D A decrease in gain
By walking at 3/4 of his usual speed, a man reaches his office 20 minutes later than usual. His usual time is :
A 30 minutes
B 75 minutes
C 45 minutes
D 60 minutes
In a radar-set receiver, the usual mixer stage is
A And FET
B A tunnel diode
C A silicon crystal
D A Rochelle salts crystal
If the duration of the radar transmitted pulse, on a particular range of operation, is increased, the required bandwidth of the receiver’s IF amplifiers
A Must remain as before
B Must be increased
C May be decreased
D Must be doubled
A person walking 5/6 of his usual rate is 40 minutes late. What is his usual time?
A 2 hours 20 minutes
B 3 hours 20 minutes
C 2 hours
D 4 hours 10 minutes
A train left 1 hour later than the scheduled time but in order to reach its destination 200 km away in time, it had to increase its usual speed by 10 km/hr. What is the usual speed (in km/hr) of the train?
A 38
B 42
C 45
D 40
Travelling at 4/5th of his usual speed, a man is 15 minutes late. What is his usual time to cover the same distance?
A 15 min
B 1 hr
C 75 min
D 45 min
It is possible to increase the maximum range of a radar equipment by
A Lowering the pulse frequency
B Raising the peak power of the transmitter
C Narrowing the beam width and increasing the pulse duration
D All of these
When it is desired that short-range targets be clearly seen on a pulsed-radar set, it is important that the receiver and display system have
A A long time constant
B Low-pass filters
C The shortest possible time
D The restricted high-frequency response
Of 30 integers, 12 are in set A , 22 are in set A , 22 are in set B , and 7 are in both set A and B. How many of the integers in NITTHER set A nor set B?
A 4
B 1
C 3

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