Electrical Utility Engineer Interview Questions and Answers

A relay is an electrically operated switch that controls a high-power circuit with a low-power signal.

• Relays are used to control circuits by opening or closing contacts based on an input signal

• They are commonly used in electrical systems to control motors, lights, heaters, and other high-power devices

• Relays can be either electromechanical or solid-state

• Examples of relays include automotive relays, power relays, and signal relays

Diesel generators work on the principle of converting mechanical energy into electrical energy through the combustion of diesel fuel.

• Diesel fuel is injected into the combustion chamber where it is ignited by compressed air, creating a controlled explosion.

• The explosion drives a piston which is connected to a crankshaft, converting the mechanical energy into rotational motion.

• The rotational motion of the crankshaft is used to turn an alternator, which generates electrical ener...read more

Transformer works on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.

• Transformers have two coils of wire, known as primary and secondary coils.

• When an alternating current flows through the primary coil, it creates a changing magnetic field.

• This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy.

• Transformers are used to step up or step down voltage levels in power distribution sy...read more