Question 79Electricity & Electronics - Assistant Engineer

The correct answer is C) checking for vibration. Vibration is a critical component of the routine periodic maintenance checks for electrical motors. Excessive vibration can indicate underlying issues with the motor, such as misalignment, worn bearings, or imbalance, which can lead to premature failure if not addressed. Checking for vibration is a standard practice recommended by the US Coast Guard and other regulatory bodies to ensure the safe and reliable operation of electrical motors. The other options are not directly relevant to the routine maintenance of electrical motors. Watertight integrity (A) is more applicable to equipment exposed to water, such as submersible pumps. Speed droop (B) is a concern for governing systems, not the motor itself. Checking for reactive power (D) is more relevant to the electrical supply system rather than the motor.