Vardhman Group (Mumbai) Senior Shift Officer Interview Questions and Answers

The type of coil used in an ACB (Air Circuit Breaker) varies depending on the specific model and manufacturer.

• ACBs can use different types of coils such as electromagnetic coils or solid-state coils.

• Electromagnetic coils use a magnetic field to generate the necessary force to open or close the circuit breaker.

• Solid-state coils use electronic components to control the operation of the ACB.

• The choice of coil depends on f...read more

A Dol starter control wiring diagram is a schematic representation of the electrical connections of a direct online starter.

• The diagram typically includes a power supply, a contactor, an overload relay, and a start and stop button.

• The power supply is connected to the contactor, which controls the flow of electricity to the motor.

• The overload relay is used to protect the motor from damage due to overloading.

• The start an...read more

Power factor is the ratio of real power to apparent power. Types include leading, lagging, and unity power factor.

• Power factor is a measure of how efficiently electrical power is being used.

• It is calculated by dividing real power (measured in watts) by apparent power (measured in volt-amperes).

• A power factor of 1 (or unity) means all the power is being used efficiently, while a power factor less than 1 means some power...read more