Radar Lidar Recert / NC RADAR Actual
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1. Frequency is also referred to - ANSWER cycles per second
2. Rage information is expressed in either ___ or ___ - ANSWER yards or
feet
3. Radio energy always travels at approximately ___ miles per second (speed
of light) - ANSWER 186,000
4. ___ of a radio signal changes when the reflected singal from a target is
moving at a different speed than the radar instrument. This change in
frequency is known as ___ - ANSWER frequency (cycles per second) ,
doppler shift
5. A police radar compares the __ frequency with the ___ frequency -
ANSWER transmitted, returning
,6. The radar antennas ___ ___ ___ ___ microwave radio energy - ANSWER
shape, form, transmit, receive
7. Wave lengths are measured from - ANSWER beginning of the peak to
the end of the valley
8. The number of waves transmitted in one second of time equals the -
ANSWER frequency
9. Frequency is written out as - ANSWER gigahertz or GHz
10.Giga means__ and hertz means ___ - ANSWER giga - billions, hertz -
cycles per second
11.Waves per second and cycles per second are - ANSWER the same thing
12.X-band radar transmits at ___ GHz and has a wave length of ___
centimeters - ANSWER 10.525 ghz and 3 centimeteres
13.K-band radar transmits at ___ GHz and has a wave length of ___
centimeters - ANSWER 24.150 ghz and 1.25 centimeters
14.Ka-band radar transmits at ___ GHz and has a wave length of ___
centimeters - ANSWER 33.4 to 36 ghz and 4/5 centimeters
, 15.When a change occurs, the signal speed does not change but the ___ -
ANSWER wavelength and frequency
16.___ discovered that relative motion causes a signals frequency to change by
studying sound and waves. as it relates to radar, this is known as the ___ -
ANSWER Christian Doppler (austrian physicist). doppler principle
17.The doppler principle can be explained as - ANSWER - must be relative
motion between radar and solid object
-as the object and radar get closer, the frequency gets higher then the output
frequency
-as the object and the radar get further, the frequency gets lower than the
transmitted signals frequency
-the speed of the relative motion determines how much higher or lower the
reflected signal's frequency will be
18.The angular effect (cosine effect) always works in the target vehicle's ___
while in stationary radar. giving the advantage to the ___ - ANSWER
advantage, violator
19.You should not operate a radar more than a ___ degree angle in stationary
monde. this is a NC standard. - ANSWER 20 degrees
20.To try and better control angular effect, set up ___ - ANSWER closer to
the road
Exam Questions With Reviewed 100%
Correct Detailed Answers
Guaranteed Pass!!Current Update
(Verified Pass)
1. Frequency is also referred to - ANSWER cycles per second
2. Rage information is expressed in either ___ or ___ - ANSWER yards or
feet
3. Radio energy always travels at approximately ___ miles per second (speed
of light) - ANSWER 186,000
4. ___ of a radio signal changes when the reflected singal from a target is
moving at a different speed than the radar instrument. This change in
frequency is known as ___ - ANSWER frequency (cycles per second) ,
doppler shift
5. A police radar compares the __ frequency with the ___ frequency -
ANSWER transmitted, returning
,6. The radar antennas ___ ___ ___ ___ microwave radio energy - ANSWER
shape, form, transmit, receive
7. Wave lengths are measured from - ANSWER beginning of the peak to
the end of the valley
8. The number of waves transmitted in one second of time equals the -
ANSWER frequency
9. Frequency is written out as - ANSWER gigahertz or GHz
10.Giga means__ and hertz means ___ - ANSWER giga - billions, hertz -
cycles per second
11.Waves per second and cycles per second are - ANSWER the same thing
12.X-band radar transmits at ___ GHz and has a wave length of ___
centimeters - ANSWER 10.525 ghz and 3 centimeteres
13.K-band radar transmits at ___ GHz and has a wave length of ___
centimeters - ANSWER 24.150 ghz and 1.25 centimeters
14.Ka-band radar transmits at ___ GHz and has a wave length of ___
centimeters - ANSWER 33.4 to 36 ghz and 4/5 centimeters
, 15.When a change occurs, the signal speed does not change but the ___ -
ANSWER wavelength and frequency
16.___ discovered that relative motion causes a signals frequency to change by
studying sound and waves. as it relates to radar, this is known as the ___ -
ANSWER Christian Doppler (austrian physicist). doppler principle
17.The doppler principle can be explained as - ANSWER - must be relative
motion between radar and solid object
-as the object and radar get closer, the frequency gets higher then the output
frequency
-as the object and the radar get further, the frequency gets lower than the
transmitted signals frequency
-the speed of the relative motion determines how much higher or lower the
reflected signal's frequency will be
18.The angular effect (cosine effect) always works in the target vehicle's ___
while in stationary radar. giving the advantage to the ___ - ANSWER
advantage, violator
19.You should not operate a radar more than a ___ degree angle in stationary
monde. this is a NC standard. - ANSWER 20 degrees
20.To try and better control angular effect, set up ___ - ANSWER closer to
the road
