Electrical Executive Interview Questions and Answers

Transformer main parts include core, windings, and insulation. Daily maintenance involves checking for leaks, loose connections, and abnormal noises.

• Main parts of a transformer include core, windings, and insulation

• Daily maintenance involves checking for leaks in the transformer oil

• Check for loose connections and tighten if necessary

• Listen for abnormal noises during operation

• Inspect cooling system for proper functioning

Megger is a device used to measure insulation resistance in electrical systems.

• Megger is short for Megohmmeter

• It is used to test the insulation resistance of wires, cables, transformers, and motors

• It works by applying a high voltage to the insulation and measuring the resulting current

• Starters are used to control the starting and stopping of motors

• Common types of starters include direct-on-line, star-delta, and soft starters

Motor we and ir values are related to the efficiency and power consumption of the motor.

• WE (Winding Efficiency) value indicates how efficiently the motor converts electrical energy into mechanical energy.

• IR (Input Resistance) value represents the resistance of the motor to the flow of current, affecting power consumption.

• Higher WE value means better efficiency, while lower IR value means less power consumption.

A tongue tester is a device used to test the electrical conductivity of a surface.

• It is commonly used in the electrical industry to test the conductivity of wires and cables.

• The device consists of two metal probes that are touched to the surface being tested.

• If the surface is conductive, the device will indicate a current flow.

• Tongue testers are also known as continuity testers or circuit testers.