RADAR QUESTIONS AND ANSWERS
While performing the 12 hours of field practice the trainee is not required to drive the
car, and the trainer can perform traffic stops for speeding and other violations? -
Answers - False
What calculated total times used for basic skill testing causes a failure? - Answers - 121
MINS
Which is not an element of the speeding offense/ - Answers - Vehicle
In 1977 NHTSA performed a study to increase the speed limit from 55 to 60 mph. It was
determined that the increase would have a relatively small impact on the number of
crashes and injuries approximately 1% and 2% respectively. However, a 9% increase in
the number of fatalities. How many lives does that 9% translate to? - Answers - 3,500
In 1974 a 16.8% decrease in traffic fatalities translated to how many lives? - Answers -
8,856
What is frequency? - Answers - cycles per second
What is constant? - Answers - signal speed
We measure a wave from the _____________ peak to the ____________ of the valley.
- Answers - beginning, end
What is the frequency of an X band Radar? - Answers - 10,525,000,000 cycles per
second
What is the frequency of an KA band radar? - Answers - 33.4-36 ghz
What is the frequency of a K band radar? - Answers - 24,150,000,000 hz per second
Signal speed travels at a speed of? - Answers - 30,000,000,000 centimeters per second
Christian Johann Doppler who discovered the doppler principle was studying what? -
Answers - sound waves
With the doppler principle frequency change will only happen when there is relative
motion between the radar and the object. - Answers - True
Relative motion can be best described as... - Answers - the object stands still and the
radar moves, the radar stands still and the object moves, the radar and the object are
moving in the same direction at different speeds
, The only time a radar will show you the true speed of a vehicle is if... - Answers - the
vehicle is going directly towards of directly away from the radar
Never set the radar up any further than _______ degrees from the target vehicles
direction travel. - Answers - 0
The larger the angle with the cosine effect in the stationary mode will always: - Answers
- show the true speed lower
One factor that has very little effect on target selectivity is: - Answers - color of the
vehicle
A beam whose angle is 11 degrees will be more than 38 feet wide at 200 feet down the
road. It will be more than __ feet wide at 300 feet away. - Answers - 57 feet
When adjusting the radar range control you are shortening the length of the transmitted
beam. - Answers - False
According to Brandis v. Brown on NC evidence can a person that has not been trained
testify to speed or stopping distance? - Answers - yes
Depending on the ______________ its reflective signal may not be seen by the radar
unit. - Answers - size and shape, speed, composition, exact location
When you are clocking a car and suddenly the clock goes away for a time then re-
appears could be an example of. - Answers - Multi path beam cancelation
If you have a two piece radar (antenna and box) and while pointing the antenna at the
counting box you receive a strange reading. This could be an example of: - Answers -
Panning
If you make a stationary clock while moving forward or back this is an example of? -
Answers - scanning
Does crash avoidance systems have any effect on police radar? - Answers - false
In moving radar you have ___________________ beam transmitted and
___________________ beams reflected back? - Answers - 1, 2
If you are operating in moving opposite direction front antenna what formula will you
use? - Answers - TS=CS - PS
If you are operating in moving opposite direction rear antenna what formula will you
use? - Answers - TS= SS - PS
While performing the 12 hours of field practice the trainee is not required to drive the
car, and the trainer can perform traffic stops for speeding and other violations? -
Answers - False
What calculated total times used for basic skill testing causes a failure? - Answers - 121
MINS
Which is not an element of the speeding offense/ - Answers - Vehicle
In 1977 NHTSA performed a study to increase the speed limit from 55 to 60 mph. It was
determined that the increase would have a relatively small impact on the number of
crashes and injuries approximately 1% and 2% respectively. However, a 9% increase in
the number of fatalities. How many lives does that 9% translate to? - Answers - 3,500
In 1974 a 16.8% decrease in traffic fatalities translated to how many lives? - Answers -
8,856
What is frequency? - Answers - cycles per second
What is constant? - Answers - signal speed
We measure a wave from the _____________ peak to the ____________ of the valley.
- Answers - beginning, end
What is the frequency of an X band Radar? - Answers - 10,525,000,000 cycles per
second
What is the frequency of an KA band radar? - Answers - 33.4-36 ghz
What is the frequency of a K band radar? - Answers - 24,150,000,000 hz per second
Signal speed travels at a speed of? - Answers - 30,000,000,000 centimeters per second
Christian Johann Doppler who discovered the doppler principle was studying what? -
Answers - sound waves
With the doppler principle frequency change will only happen when there is relative
motion between the radar and the object. - Answers - True
Relative motion can be best described as... - Answers - the object stands still and the
radar moves, the radar stands still and the object moves, the radar and the object are
moving in the same direction at different speeds
, The only time a radar will show you the true speed of a vehicle is if... - Answers - the
vehicle is going directly towards of directly away from the radar
Never set the radar up any further than _______ degrees from the target vehicles
direction travel. - Answers - 0
The larger the angle with the cosine effect in the stationary mode will always: - Answers
- show the true speed lower
One factor that has very little effect on target selectivity is: - Answers - color of the
vehicle
A beam whose angle is 11 degrees will be more than 38 feet wide at 200 feet down the
road. It will be more than __ feet wide at 300 feet away. - Answers - 57 feet
When adjusting the radar range control you are shortening the length of the transmitted
beam. - Answers - False
According to Brandis v. Brown on NC evidence can a person that has not been trained
testify to speed or stopping distance? - Answers - yes
Depending on the ______________ its reflective signal may not be seen by the radar
unit. - Answers - size and shape, speed, composition, exact location
When you are clocking a car and suddenly the clock goes away for a time then re-
appears could be an example of. - Answers - Multi path beam cancelation
If you have a two piece radar (antenna and box) and while pointing the antenna at the
counting box you receive a strange reading. This could be an example of: - Answers -
Panning
If you make a stationary clock while moving forward or back this is an example of? -
Answers - scanning
Does crash avoidance systems have any effect on police radar? - Answers - false
In moving radar you have ___________________ beam transmitted and
___________________ beams reflected back? - Answers - 1, 2
If you are operating in moving opposite direction front antenna what formula will you
use? - Answers - TS=CS - PS
If you are operating in moving opposite direction rear antenna what formula will you
use? - Answers - TS= SS - PS
