TRS Staffing Solutions Electrical Supervisor Interview Questions and Answers

Ten delta test is a method used to measure the winding insulation condition of a transformer.

• Ten delta test measures the power factor difference between the high-voltage and low-voltage windings of a transformer.

• It helps in detecting any insulation issues or deterioration in the transformer windings.

• The test involves applying a voltage to one winding and measuring the current in both windings to calculate the power fac...read more

The oil used in DG work is typically diesel oil or lubricating oil.

• Diesel oil is commonly used as fuel in diesel generators.

• Lubricating oil is used for the proper functioning and maintenance of the engine.

• The type and grade of oil used may vary depending on the specific requirements of the generator.

Star delta starter is used to reduce starting current in induction motors by initially connecting the motor windings in a star configuration and then switching to a delta configuration.

• Star delta starter is commonly used in applications where high starting current is a concern, such as large induction motors.

• It involves connecting the motor windings in a star configuration during starting to reduce the current drawn fr...read more