Question 479Electricity & Electronics - QMED
70% to passFor what reason should engine room watchstanders keep a constant check on the loads carried by electric motors?
Aenergy is wasted if full loading is not utilized
Bresidual magnetism may increase
Clow loads necessitate frequent insulation cleaning
Dexceeding nameplate currents shortens useful life
AI Explanation
The correct answer is D) exceeding nameplate currents shortens useful life. Engine room watchstanders need to closely monitor the loads on electric motors to ensure they do not exceed the motor's nameplate current ratings. Operating motors at loads beyond their design specifications can overheat the windings and insulation, which shortens the useful life of the motor. This is a key consideration for maintaining the safety and reliability of the vessel's electrical systems. The other answer choices are incorrect, as they do not directly address the critical importance of not exceeding a motor's rated capacity.
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