Question 277Electricity & Electronics - 1st Asst/Chief

70% to pass

As shown in the illustrated switchboard, what is the function of the switch labeled 'PFM Sel. Sw.'? Illustration EL-0003

Diagram for USCG Electrical Chief: As shown in the illustrated switchboard, what is the function of the switch...
Ato determine bus frequency
Bto determine reactive volt amperes of the bus
Cto determine frequency of either generator
Dto determine power factor of either generator
AI Explanation

The correct answer is D) to determine power factor of either generator. The "PFM Sel. Sw." or Power Factor/Megawatt Selector Switch is used to determine the power factor of the generators connected to the switchboard. This is an important parameter to monitor, as the power factor affects the efficiency and performance of the electrical system. The other answer choices are incorrect because they do not accurately describe the function of this particular switch. Options A and C relate to frequency, while option B is about reactive volt-amperes, which are different electrical parameters from power factor.

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Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
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