NC RADAR OPERATOR COURSE
ACTUAL TEST 200 QUESTIONS AND
CORRECT ANSWERS 2025-2026
LATEST GRADED A+
What is the minimum ratio of instructors to students? - CORRECT ANSWER-1 Instructor to every 6
students
What must officers collect to establish the presence of various elements which make up a good
speed offense? - CORRECT ANSWER-Evidence
55mph was chosen because it is the __________ - CORRECT ANSWER-median energy efficiency
speed
The speed was determined how? - CORRECT ANSWER-by studying wind resistance factors and
engine efficiency factors
What percentage of spinal cord injuries caused by auto crashes drop to? - CORRECT ANSWER-60-
70%
The probability of a fataility in a crash roughly doubles as traveling speed increases from _______,
and doubles again as speeds go to _____ - CORRECT ANSWER-45-60mph
70mph
What percentage was determined when raising the speed limit to 60mph? - CORRECT ANSWER-It
would have a relatively small effect on the number of crashes and injuries (approximately 1% and
2%)
What percentage of fatalities were expected? - CORRECT ANSWER-9%
With a 5 MPH increase in the national speed limit, what % in the number of fatalities were
expected? - CORRECT ANSWER-9%
,The word "RADAR" is an acronym, an abbreviation of the phrase RAdio Detection And __? - CORRECT
ANSWER-Ranging
The police radar provides us with the speed reading on a detected target but not the ___ to the
target? - CORRECT ANSWER-Range
When was it known that radio waves could be reflected from solid objects? - CORRECT ANSWER-
1886
What did it take in order to bring about serious research and development? - CORRECT ANSWER-The
imminent threat of war in Europe
In what year was the imminent threat of war in Europe? - CORRECT ANSWER-Late 1930's
How may the range information be provided? - CORRECT ANSWER-May be expressed in yards or feet
How is radio frequency energy generated? - CORRECT ANSWER-by a transmitter
The energy will travel indefinately unless - CORRECT ANSWER-absorbed, reflected or refracted
Outside of the ___________, reflective capability and position again become significant factors -
CORRECT ANSWER-6-12mph
Same Direction RADAR units will not process target speeds closer than ______ - CORRECT ANSWER-
3-6mph
What happens when the energy strikes an objects? - CORRECT ANSWER-a small amount is reflected
back to the antenna
where is the energy sent once it hits the antenna? - CORRECT ANSWER-the receiver
How fast does radio energy travel? - CORRECT ANSWER-186,000 miles per second
, The speed of radio energy is therefore a_______ in all of the computation that are performed in any
RADAR device - CORRECT ANSWER-Constant
What do you call when the characteristic in the frequency (cycles per second) of a radio signal
changes when the signal is reflected from a target that is moving at a different speed than the
RADAR device? - CORRECT ANSWER-Doppler Shift
Define Doppler shift - CORRECT ANSWER-The difference between the transmitted frequency and the
received frequency
Each wave consists of a - CORRECT ANSWER-peak and valley
How fast does the RADAR travel? - CORRECT ANSWER-speed of light (186k miles/second)
The radar's transmitted beam will travel __ unless it is absorbed, reflected, refracted? - CORRECT
ANSWER-indefinately
The wave length is literally the physical distance, or length from the? - CORRECT ANSWER-Beginning
of the peak to the end of the valley
The number of waves transmitted in one second of time equals the ? - CORRECT ANSWER-frequency
Police radar signals have frequencies of more than ___ waves per second? - CORRECT ANSWER-
10gigahertz
A so called X-band radar signal is? - CORRECT ANSWER-10.525 gigahertz
A so called K-band radar signal is __ Gigahertz? - CORRECT ANSWER-24.150 gigahertz
what is a giga? - CORRECT ANSWER-billion
what is a hertz? - CORRECT ANSWER-cycles per second
ACTUAL TEST 200 QUESTIONS AND
CORRECT ANSWERS 2025-2026
LATEST GRADED A+
What is the minimum ratio of instructors to students? - CORRECT ANSWER-1 Instructor to every 6
students
What must officers collect to establish the presence of various elements which make up a good
speed offense? - CORRECT ANSWER-Evidence
55mph was chosen because it is the __________ - CORRECT ANSWER-median energy efficiency
speed
The speed was determined how? - CORRECT ANSWER-by studying wind resistance factors and
engine efficiency factors
What percentage of spinal cord injuries caused by auto crashes drop to? - CORRECT ANSWER-60-
70%
The probability of a fataility in a crash roughly doubles as traveling speed increases from _______,
and doubles again as speeds go to _____ - CORRECT ANSWER-45-60mph
70mph
What percentage was determined when raising the speed limit to 60mph? - CORRECT ANSWER-It
would have a relatively small effect on the number of crashes and injuries (approximately 1% and
2%)
What percentage of fatalities were expected? - CORRECT ANSWER-9%
With a 5 MPH increase in the national speed limit, what % in the number of fatalities were
expected? - CORRECT ANSWER-9%
,The word "RADAR" is an acronym, an abbreviation of the phrase RAdio Detection And __? - CORRECT
ANSWER-Ranging
The police radar provides us with the speed reading on a detected target but not the ___ to the
target? - CORRECT ANSWER-Range
When was it known that radio waves could be reflected from solid objects? - CORRECT ANSWER-
1886
What did it take in order to bring about serious research and development? - CORRECT ANSWER-The
imminent threat of war in Europe
In what year was the imminent threat of war in Europe? - CORRECT ANSWER-Late 1930's
How may the range information be provided? - CORRECT ANSWER-May be expressed in yards or feet
How is radio frequency energy generated? - CORRECT ANSWER-by a transmitter
The energy will travel indefinately unless - CORRECT ANSWER-absorbed, reflected or refracted
Outside of the ___________, reflective capability and position again become significant factors -
CORRECT ANSWER-6-12mph
Same Direction RADAR units will not process target speeds closer than ______ - CORRECT ANSWER-
3-6mph
What happens when the energy strikes an objects? - CORRECT ANSWER-a small amount is reflected
back to the antenna
where is the energy sent once it hits the antenna? - CORRECT ANSWER-the receiver
How fast does radio energy travel? - CORRECT ANSWER-186,000 miles per second
, The speed of radio energy is therefore a_______ in all of the computation that are performed in any
RADAR device - CORRECT ANSWER-Constant
What do you call when the characteristic in the frequency (cycles per second) of a radio signal
changes when the signal is reflected from a target that is moving at a different speed than the
RADAR device? - CORRECT ANSWER-Doppler Shift
Define Doppler shift - CORRECT ANSWER-The difference between the transmitted frequency and the
received frequency
Each wave consists of a - CORRECT ANSWER-peak and valley
How fast does the RADAR travel? - CORRECT ANSWER-speed of light (186k miles/second)
The radar's transmitted beam will travel __ unless it is absorbed, reflected, refracted? - CORRECT
ANSWER-indefinately
The wave length is literally the physical distance, or length from the? - CORRECT ANSWER-Beginning
of the peak to the end of the valley
The number of waves transmitted in one second of time equals the ? - CORRECT ANSWER-frequency
Police radar signals have frequencies of more than ___ waves per second? - CORRECT ANSWER-
10gigahertz
A so called X-band radar signal is? - CORRECT ANSWER-10.525 gigahertz
A so called K-band radar signal is __ Gigahertz? - CORRECT ANSWER-24.150 gigahertz
what is a giga? - CORRECT ANSWER-billion
what is a hertz? - CORRECT ANSWER-cycles per second
