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Ship Radar Endorsement
Element 8
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Ship Radar Endorsement · 300 questions

Element 8 - USCG Exam Questions

Ship radar techniques: radar principles, transmitters and receivers, antennas, displays, installation, servicing and safety. The exam asks 50 questions; 38 correct passes.

Every question below is a real U.S. Coast Guard exam question with four choices. Answer one and the correct choice is revealed instantly, with the USCG reference and illustration where the question uses one.

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All Element 8 questions

Questions 101–200 of 300 · page 2 of 3

  1. #101 Pulse RADARs require precise timing for their operation. Which type circuit below might best be used to provide these accurate timing pulses?
  2. #102 Unblanking pulses are produced by the timer circuit. Where are they sent?
  3. #103 An advantage of resonant charging is that it:
  4. #104 The characteristics of a field-effect transistor (FET) used in a modern RADAR switching power supply can be compared as follows:
  5. #105 A pulse-width modulator in a switching power supply is used to:
  6. #106 In a fixed-frequency switching power supply, the pulse width of the switching circuit will increase when:
  7. #107 A major consideration for the use of a switching regulator power supply over a linear regulator is:
  8. #108 Which of the following characteristics are true of a power MOSFET used in a RADAR switching supply?
  9. #109 Which of the following statements is true?
  10. #110 Logarithmic receivers:
  11. #111 RADAR receivers are similar to:
  12. #112 What section of the receiving system sends signals to the display system?
  13. #113 What is the main difference between an analog and a digital receiver?
  14. #114 In a RADAR receiver, the RF power amplifier:
  15. #115 The diagram in Fig. 8C9 shows a simplified RADAR mixer circuit using a crystal diode as the first detector. What is the output of the circuit when no...
  16. #116 In the receive mode, frequency conversion is generally accomplished by a:
  17. #117 An RF mixer has what purpose in a RADAR system?
  18. #118 In a RADAR unit, the mixer uses a:
  19. #119 What component of a RADAR receiver is represented by block 49 in Fig. 8A1?
  20. #120 In a RADAR unit, the mixer uses:
  21. #121 The error voltage from the discriminator is applied to the:
  22. #122 In a RADAR unit, the local oscillator is a:
  23. #123 What component of a RADAR receiver is represented by block 48 in Fig. 8A1?
  24. #124 What device(s) could be used as the local oscillator in a RADAR receiver? PAGE 27
  25. #125 The klystron local oscillator is constantly kept on frequency by:
  26. #126 How may the frequency of the klystron be varied?
  27. #127 Overcoupling in a RADAR receiver will cause?
  28. #128 The usual intermediate frequency of a shipboard RADAR unit is:
  29. #129 The I.F. Amplifier bandwidth is:
  30. #130 A logarithmic IF amplifier is preferable to a linear IF amplifier in a RADAR receiver because it:
  31. #131 The high-gain IF amplifiers in a RADAR receiver may amplify a 2 microvolt input signal to an output level of 2 volts. This amount of amplification rep...
  32. #132 In a RADAR receiver AGC and IAGC can vary between:
  33. #133 Which of the following statements is correct?
  34. #134 Video amplifiers in pulse RADAR receivers must have a broad bandwidth because:
  35. #135 In video amplifiers, compensation for the input and output stage capacitances must be accomplished to prevent distorting the video pulses. This compen...
  36. #136 Which of the following signals is not usually an input to the video amplifier?
  37. #137 Which of the following signals are usually an input to the video amplifier?
  38. #138 The video (second) detector in a pulse modulated RADAR system would most likely use a/an:
  39. #139 The AFC system is used to:
  40. #140 A circuit used to develop AFC voltage in a RADAR receiver is called the:
  41. #141 In the AFC system, the discriminator compares the frequencies of the:
  42. #142 An AFC system keeps the receiver tuned to the transmitted signal by varying the frequency of the:
  43. #143 A RADAR transmitter is operating on 3.0 GHz and the reflex klystron local oscillator, operating at 3.060 GHz, develops a 60 MHz IF. If the magnetron d...
  44. #144 What component is block 50 in Fig. 8A1?
  45. #145 The STC circuit is used to:
  46. #146 The STC circuit:
  47. #147 Sea return is:
  48. #148 Sea clutter on the RADAR scope cannot be effectively reduced using front panel controls. What circuit would you suspect is faulty?
  49. #149 What circuit controls the suppression of sea clutter?
  50. #150 The sensitivity time control (STC) circuit:
  51. #151 Prior to making “power-on” measurements on a switching power supply, you should be familiar with the supply because of the following:
  52. #152 A constant frequency switching power supply regulator with an input voltage of 165 volts DC, and a switching frequency of 20 kHz, has an “ON” time of...
  53. #153 The circuit shown in Fig. 8C10 is the output of a switching power supply. Measuring from the junction of CR6, CR7 and L1 to ground with an oscilloscop...
  54. #154 With regard to the comparator shown in Fig. 8C11, the input is a sinusoid. Nominal high level output of the comparator is 4.5 volts. Choose the most c...
  55. #155 When monitoring the gate voltage of a power MOSFET in the switching power supply of a modern RADAR, you would expect to see the gate voltage change fr...
  56. #156 The nominal output high of the comparator shown in Fig. 8C11 is 4.5 volts. Choose the most correct statement which describes the trip points.
  57. #157 One of the best methods of reducing noise in a RADAR receiver is?
  58. #158 The primary cause of noise in a RADAR receiver can be attributed to:
  59. #159 Noise can appear on the LCD as:
  60. #160 RADAR interference on a communications receiver appears as:
  61. #161 In a RADAR receiver the most common types of interference are?
  62. #162 Noise can:
  63. #163 The purpose of the discriminator circuit in a RADAR set is to:
  64. #164 The MTI circuit:
  65. #165 Where is a RF attenuator used in a RADAR unit?
  66. #166 The condition known as “glint” refers to a shifting of clutter with each RADAR pulse and can be caused by a:
  67. #167 An ion discharge (TR) cell is used to:
  68. #168 When the receiver employs an MTI circuit:
  69. #169 Modern liquid crystal displays have a pixel count of:
  70. #170 Voltages used in CRT anode circuits are in what range of value?
  71. #171 The purpose of the aquadag coating on the CRT is:
  72. #172 LCD patterns are formed when:
  73. #173 In a raster-type display, the electron beam is scanned:
  74. #174 Select the statement, which is most correct regarding a raster scan display.
  75. #175 What are the usual input signals to the video amplifier?
  76. #176 Which of the following would not normally be an input to the video amplifier?
  77. #177 The purpose of the sweep amplifier is to:
  78. #178 How many deflection coils are driven by the sweep amplifier?
  79. #179 The main purpose of the sweep generator is to provide:
  80. #180 The main purpose of the video amplifier is to provide:
  81. #181 Timing circuits are used to provide what function?
  82. #182 The circuit that develops timing signals is called the:
  83. #183 Which of the following functions is not affected by the timing circuit?
  84. #184 The synchronizer primarily affects the following circuit or function:
  85. #185 The output from the synchronizer usually consists of a:
  86. #186 The sweep drive is initiated by what circuit?
  87. #187 Accurate range markers must be developed using very narrow pulses. A circuit that could be used to provide these high-quality pulses for the CRT is a:
  88. #188 Range markers are determined by:
  89. #189 A gated LC oscillator, operating at 27 kHz, is being used to develop range markers. If each cycle is converted to a range mark, the range between mark...
  90. #190 What would be the frequency of a range ring marker oscillator generating range rings at 10 nautical miles intervals?
  91. #191 What is the distance between range markers if the controlling oscillator is operating at 20 kHz?
  92. #192 What would be the frequency of a range ring marker oscillator generating range rings at intervals of 0.25 nautical miles?
  93. #193 The variable range marker signal is normally fed to the input of the:
  94. #194 The purpose of the variable range marker is to:
  95. #195 How is the variable range marker usually adjusted for accuracy?
  96. #196 The panel control for the variable range marker is normally a:
  97. #197 An important component of the VRM system is the:
  98. #198 Which of the following statements about the Variable Range Marker system is correct?
  99. #199 The purpose of the Electronic Bearing Line is to:
  100. #200 The Electronic Bearing Line is:

Element 8 questions: what to expect

Q How many Element 8 questions are in the Ship Radar Endorsement pool?

There are 300 Element 8 questions on this site, every one released by the U.S. Coast Guard or taken from the National Maritime Center's sample examinations, with its correct answer. The exam draws its Element 8 module from the same pool.

Q What score do I need to pass the Element 8 module?

Most USCG exam modules, including Element 8, require 70 percent to pass. Rules of the Road modules require 90 percent.

Q Are these the real USCG Element 8 exam questions?

Yes. They are the published U.S. Coast Guard questions, matched to the National Maritime Center's 2026 sample examinations. Answer any question to see the correct choice, the USCG reference and the illustration where the question uses one.

About the Ship Radar Endorsement question pool

The FCC Element 8 pool for the Ship Radar Endorsement: radar theory, installation, servicing and maintenance of ship radar equipment used for navigation.