2 1-10.   Which of the following terms describes radar returns that exceed the prt of the radar? 1.     Clutter 2.     Ambiguous 3.     Reciprocal 4.     Acquisition 1-11.   What type of transmitter power is measured over a period of time? 1.     Peak 2.     Return 3.     Average 4.     Reciprocal 1-12.   Which of the following formulas can be used to compute the duty cycle of a radar set? 1. 2. 3. 4. IN ANSWERING QUESTIONS 1-13 AND 1-14, ASSUME THAT A RADAR SET HAS THE FOLLOWING CHARACTERISTICS: AVERAGE POWER = 700 WATTS PULSE WIDTH = 3. 5 MICROSECONDS PRF = 400 HERTZ 1-13.   What is the peak power (in kilowatts) for this radar set? 1.        500 2. 1,500 3. 2,000 4. 2,500 1-14.   What is the pulse-repetition time (in microseconds) for this radar set? 1. 1,500 2. 2,000 3. 2,500 4. 4,000 1-15.   For a radar set with a pulse width of 25 microseconds and a prf of 600 pulses per second, what is the duty cycle? 1. 0.015 2. 0.024 3. 0.15 4. 0.24 1-16.   What is the maximum radar horizon distance for a radar set with an antenna 100 feet above the surface of the earth? 1.         8 miles 2.       12.5 miles 3.       80 miles 4.     125 miles 1-17.   A radar set with a prf of 1,000 pps and an antenna rotation rate of 15 rpm produces what maximum number of pulses per degree? 1.       2.7 2. 11.1 3. 14.4 4. 36 1-18.   The relative bearing of a radar echo is measured with respect to which of the following reference points? 1.     True north 2.     Magnetic north 3.     Centerline of your own ship 4.     The position of the antenna