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ASSIGNMENT 1
Textbook assignment: Chapter 1, “Radar Fundamentals,” pages 1-1 through 1-45.
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1-1. Radar uses what form of energy to detect
ships, planes, and land masses?
1. Sound waves
2. Visible light
3. Infrared radiation
4. Electromagnetic energy
1-2. What radar measurement of an object is
referenced to true north?
1. Height
2. Surface angle
3. Vertical angle
4. One-way distance
1-3. The elevation angle to the target is the
angle between which of the following
references?
1. Ship's heading and line of sight
2. Vertical plane and line of sight
3. Horizontal plane and line of sight
4. Vertical plane and horizontal plane
1-4. Electromagnetic energy travels through
air at approximately what speed?
1. 984 feet per microsecond
2. 186,000 statute miles per second
3. 162,000 nautical miles per second
4. Each of the above is correct
1-5. For an object that is detected 15 miles
from a radar set, what is the approximate
time required for the rf energy to travel
to and return from the object?
1. 7 microseconds
2. 185 microseconds
3. 271 microseconds
4. 927 microseconds
1-6. The minimum range of a radar depends
on the length of time of the transmitter
pulse (pulse width) and recovery time.
During this period, the radar can NOT
receive energy. A radar set with a pulse
width of 5 microseconds and a recovery
time of 0. 2 microseconds has a
minimum range of approximately
1. 614 yards
2. 787 yards
3. 852 yards
4. 4,100 yards
1-7. Of the following radar characteristics,
which has NO effect on maximum range
capability?
1. Recovery time
2. Carrier frequency
3. Receiver sensitivity
4. Pulse-repetition frequency
1-8. Which of the following characteristics of
a radar system determines the degree to
which the radiated energy is affected by
atmospheric conditions?
1. Pulse peak power
2. Carrier frequency
3. Receiver sensitivity
4. Pulse-repetition frequency
1-9. Pulse-repetition time is described as the
1. reciprocal of pulse width
2. period of time from the beginning to
the end of a transmitter pulse
3. period of time required for the pulse
to travel to the target and return
4. period of time from the beginning of
one transmitter pulse to the beginning
of the next
