Greystar QA/QC Manager Interview Questions and Answers

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers are used to increase or decrease the voltage in an electrical circuit.

• They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.

• The primary winding receives electrical energy from a power source, while the secondary ...read more

There are several types of transformers used in electrical engineering.

• Step-up transformer

• Step-down transformer

• Isolation transformer

• Auto transformer

• Instrument transformer

• Distribution transformer

• Power transformer

• Current transformer

• Potential transformer

There are several types of earthing including plate earthing, pipe earthing, rod earthing, strip earthing, and water pipe earthing.

• Plate earthing involves burying a plate made of copper or galvanized iron in the ground.

• Pipe earthing uses a pipe made of galvanized iron to provide a low resistance path to the ground.

• Rod earthing involves driving a metal rod into the ground to provide a connection for earthing.

• Strip earth...read more