Question 259Electricity & Electronics - QMED

70% to pass

What statement is true concerning a ground in a 450 VAC electrical circuit outside the engine room?

AIt is indicated by the ground detecting lamps on the main switchboard.
BIt cannot be detected under normal conditions.
CIt is of no consequence to engineering personnel.
DIt is indicated at the branch circuit breaker panel.
AI Explanation

The correct answer is A) It is indicated by the ground detecting lamps on the main switchboard. In a 450 VAC electrical circuit outside the engine room, a ground would be indicated by the ground detecting lamps on the main switchboard. This is because the ground detecting system is designed to monitor the circuit for any ground faults, which would be displayed on the main switchboard. Option A is the correct answer, as it accurately describes how a ground in this type of electrical circuit would be detected. The other options are incorrect because: B) A ground can be detected under normal conditions by the ground detecting system, C) A ground is not of no consequence and should be addressed by engineering personnel, and D) The ground would be indicated at the main switchboard, not the branch circuit breaker panel.

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