Machine Maintenance Technician Interview Questions and Answers

Star Delta connection is a method used to reduce the starting current of a motor.

• Star Delta connection involves connecting the motor windings in a star configuration during starting and then switching to a delta configuration once the motor reaches a certain speed.

• It is commonly used for large induction motors to reduce the starting current and torque.

• This method helps in preventing damage to the motor and reduces stress on the electrical supply network.

• Star Delta connection ...read more

3 phase supply is a type of electrical power transmission that uses three alternating currents.

• Consists of three alternating currents that are out of phase with each other

• Commonly used in industrial and commercial settings for powering heavy machinery

• More efficient and reliable compared to single phase supply

• Examples: motors, pumps, compressors

The heater contactor problem may be caused by issues with the electrical connections, the contactor itself, or the control system.

• Check the electrical connections for loose or damaged wires

• Inspect the contactor for signs of wear or damage

• Test the control system to ensure it is functioning properly

• Consider environmental factors that may be affecting the contactor, such as temperature or moisture

Motor overload problem can be caused by various factors such as high current draw, mechanical issues, or incorrect settings.

• Check for high current draw which may indicate a problem with the motor or the load it is driving.

• Inspect for mechanical issues such as bearing failure or misalignment that could lead to increased resistance and overload.

• Verify that the motor settings, such as voltage and current limits, are correctly configured to prevent overload.

• Consider environmental...read more