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INSTRUCTIONS ON ANSWERING QUESTIONS
ASSIGNMENT 1-Cont. - 12404_72

Fire Controlman Volume 02-Fire Control Radar Fundamentals
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ASSIGNMENT 1 Textbook Assignment:   “Introduction to Basic Radar Systems,” chapter 1, pages 1-1 through 1-11; “Basic Radar Systems,” chapter 2, pages 2-1 through 2-30; and “Radar Safety,” chapter 3, pages 3-1 through 3-7. 1-1. Radar surface angular measurements are normally made from which direction? 1.  Counter-clockwise  from  true  north 2.  Clockwise  from  true  north 3.   North/south 4.   East/west 1-2. The angle measured clockwise from true north in the horizontal plane defines which of the following terms? 1.  True  north 2.  Line-of-sight  range 3.  True  bearing/azimuth 4.  Horizontal  plane 1-3. Which of the following factors does NOT affect the maximum range of a pulse-radar system? 1.  Pulse-repetition  frequency 2. Peak power of the transmitted pulse 3.  Diameter  of  the  radar  dish 4.  Carrier  frequency 1-4. The angle between the centerline of the ship and a line pointed directly at a target is called 1.  relative  bearing 2.  angular  bearing 3.  true  bearing 4.  angle  north 1-5. What is the most common method used to transmit radar energy? 1.   Frequency-modulation 2.   Continuous-wave 3.  Doppler 4.  Pulse 1-6. What method of transmitting radar energy can be modified to use the Doppler effect? 1.   Agile 2.  Pulse 3.   Continuous-wave 4.   Frequency-modulation 1-7. Azimuth is a word that can be substituted for 1.  pulse 2.  range 3.  bearing 4.   frequency 1-8. According to the block diagram figure 1-4,  what is considered to be the heart of a fundamental radar system? 1.  Antenna  system 2.   Transmitter 3.  Modulator 4.  Duplexer 1-9. High power in the transmitter can be obtained by using which of the following components? 1.  Modulator 2.   Magnetron 3.   Klystron 4. Either 2 or 3 above 1-10. Which of the following subsystems is used to convert RF echoes to a lower frequency? 1. Superheterodyne    receiver 2.   Antenna   system 3.   Transmitter 4.  Duplexer 1






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