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Assignment Questions - 14190_201
Assignment Questions - 14190_203

Neets Module 18-Radar Principles
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22 3-48.   Which of the following methods is/are used to determine the effectiveness of a tr tube? 1.    Measure the keep-alive current 2.    Measure the keep-alive voltage 3.    Graph the correlation between recovery time and leakage power 4.    All of the above 3-49.   The presence of standing waves on a transmission line indicates which of the following conditions? 1.     Excessive output power 2.     An impedance mismatch 3.     Excessive pulse width 4.     Excessive prf 3-50.   Of the following conditions, which would be a likely indication of a high vswr? 1.     Insufficient reflection 2.     Cold spots in the transmission line 3.     Arc-over at the maximum points 4.     All of the above 3-51.   Most primary shipboard ac distribution systems provide which of the following types of electrical power? 1.       60 Hz, 3 phase, ungrounded 2.       60 Hz, 1 phase, ungrounded 3.     400 Hz, 1 phase, ungrounded 4.     400 Hz, 3 phase, ungrounded 3-52.   If your equipment is missing a certain voltage input, which of the following actions should you take first? 1.    Call an electrician 2.    Energize the emergency generator 3.    Check the input to the switchboard 4.    Check the power panel that feeds your equipment 3-53.   What is the normal source of dry air for a shipboard radar system? 1.     Compressed-air bottles 2.     Central dry-air system 3.     Dehumidifying ovens 4.     Local dehydrators 3-54.   The air control panel is designed to regulate 1.     flow 2.     purity 3.     pressure 4.     dew point 3-55.   Which of the following units may be available as an emergency back-up to the central dry-air system? 1.     Nitrogen tank 2.     Local dehydrator 3.     Local compressor-dehydrator 4.     Each of the above 3-56.   Which of the following methods is used to cool radar system components? 1.     Air blowers 2.     Liquid-cooling loops 3.     Air-conditioning systems 4.     Each of the above 3-57.   A radar cooling system has a low-flow alarm in the sea-water loop.  What is the primary purpose of this alarm? 1.    It allows correction before damage occurs 2.    It increases the flow in the distilled- water loop 3.    It removes power from the system 4.    It increases the sea-water pressure






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