RS Quiz - Sep 21

The amount of electromagnetic wave reflected from a target depends on the target

• Size and weight

• Size, shape and the material it is made of

• Size and shape

• Shape and weight

For long range requirement, the PRF used should be

• Lowered

• The same because PRF does not affect maximum required range

• Increased

• None of the above

Which of the following factor affect the choice of PRF?

• Minimum range required

• Antenna gain

• Bandwidth of the receiver

• Scanning speed of the antenna

Which of the following is a major disadvantage of using pencil beam?

• More power is required as the antenna has low gain

• It takes a longer time to complete a full 360 degree search

• A large sized aerial must be used to produce the pencil beam

• A reflector must be used to produce the pencil beam

Which of the following is NOT the reason for using high frequencies in a pulse-modulated radar?

• For smaller atmospheric absorption and longer ranges

• For good angular discrimination between adjacent targets

• To ensure an adequate number of RF cycles in each pulse

• None of the above

The term "Pulse Repetition Frequency" used in pulsed radar is

• Also known as the Duty Cycle

• The number of pulses occurring in one second

• The length of time fir which the transmitter is switched on to give each pulse

• Also known as the Peak Power

Which if the following beams do not give accurate determination in height?

• Pencil beam

• Fan Beam

• Beaver tail

• High beam

The Duty Factor, DF is give by

• DF= Pulse duration / PRF

• DF= Pulse duration X PRF

• DF= Pulse duration + PRF

• DF= Pulse duration - PRF

Personal protective gear includes all but which of the following materials?

• Gloves

• Protective clothing

• Disposable mop

• Safety glasses

Which is not a step to take if a chemical is splashed in your eye?

• Flush your eye/eyelid for 15 minutes

• Remove clothing

• Seek medical attention

• Remove contact lenses