Question 80Electricity/Electronics - Assistant Engineer70% to pass
If overloading an electric motor becomes necessary in an emergency situation, what should be done to prevent damage to the motor while allowing sustained operation?
AI Explanation
The correct answer is D) cool the motor with portable blowers and fans.
In an emergency situation where overloading an electric motor becomes necessary, the best approach to prevent damage is to provide adequate cooling to the motor. Overloading a motor can cause it to generate excessive heat, which can lead to winding insulation failure and other serious issues. By using portable blowers or fans to cool the motor, you can help dissipate the excess heat and allow the motor to operate safely under the increased load.
The other options are not the best solutions. Increasing the residual magnetism (A) would not directly address the heat buildup, and holding thermal overload relays open (B) or injecting CO2 (C) could potentially create other safety hazards or damage the motor. Cooling the motor with airflow is the most effective and safest way to manage the emergency situation.
Related Questions
#78 Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out? #79 What should be included in the routine periodic maintenance checks for electrical motors? #81 When a compound wound DC motor is differentially compounded, what does this mean? #82 Which of the listed DC compound motor connection schemes is the most commonly used? #83 The wiring diagram found in figure "B" of the illustration represents what type of DC motor? Illustration EL-0054