Basic Radars » Exercise – 1
1. Radar is :
(a) a mechanical device
(b) an electromagnetic device
(c) a pneumatic device
(d) an electrical device
2. Duplexer isolates :
(a) transmitter while transmitting
(b) receiver while receiving
(c) receiver while transmitting
(d) display unit
3. Receiver power depends on :
(a) medium losses
(b) medium, transmitter and polarization losses
(c) transmitter losses
(d) polarization losses
4. Duplexer is called :
(a) a switch
(b) coupler
(c) TR switch
(d) amplifier
5. In search radars :
(a) the beam is scanned continuously
(b) the beam is not scanned continuously
(c) angular position cannot better
(d) three antennas must be used
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