Senior Maintenance Electrician Interview Questions and Answers

A step-up transformer increases voltage while a step-down transformer decreases voltage.

• A step-up transformer has more turns in the secondary coil than in the primary coil.

• It is used to increase voltage levels, such as in power transmission.

• For example, a step-up transformer may increase voltage from 110V to 220V.

• A step-down transformer has fewer turns in the secondary coil than in the primary coil.

• It is used to decrease voltage levels, such as in household appliances.

• For exa...read more

A generator is a device that converts mechanical energy into electrical energy.

• Generators are commonly used as backup power sources during power outages.

• They work by rotating a coil of wire within a magnetic field, creating an electric current.

• Generators can be powered by various sources such as gasoline, diesel, natural gas, or renewable energy.

• They are used in various applications including residential, commercial, and industrial settings.

• Examples of generators include port...read more

MCB, MCCB, and MPCB are types of circuit breakers used in electrical systems.

• MCB stands for Miniature Circuit Breaker, which is a type of circuit breaker used for low voltage applications.

• MCCB stands for Molded Case Circuit Breaker, which is a type of circuit breaker used for higher voltage applications.

• MPCB stands for Motor Protection Circuit Breaker, which is a type of circuit breaker specifically designed to protect motors from electrical faults.

• MCBs are commonly used in r...read more