Pravin Electricals Interview Questions and Answers

A current is the flow of electric charge through a conductor.

• Current is measured in amperes (A).

• It is caused by the movement of electrons.

• There are two types of current: direct current (DC) and alternating current (AC).

• DC flows in one direction while AC alternates direction.

• Current is essential for the operation of electrical devices and systems.

Maintenance of ACB involves cleaning, inspection, and testing of various components.

• Clean the contacts and terminals of the ACB

• Inspect the insulation and wiring for any damage

• Test the ACB for proper functioning

• Replace any faulty components

• Ensure proper lubrication of moving parts

A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

• They consist of two coils of wire, known as the primary and secondary windings, which are wrapped around a magnetic core.

• When an AC voltage is applied to the primary winding, it creates a...read more

DG stands for Diesel Generator. It is a backup power source used in case of power outages or emergencies.

• DG is a type of generator that runs on diesel fuel.

• It is commonly used as a backup power source in hospitals, data centers, and other critical facilities.

• DG sets are available in various sizes and capacities to meet different power requirements.

• They require regular maintenance and fuel refilling to ensure proper fun...read more

A UPS is an Uninterruptible Power Supply that provides backup power to electronic devices during power outages.

• UPS ensures continuous power supply to devices during power outages

• It protects devices from power surges and voltage fluctuations

• UPS can be used for computers, servers, routers, and other electronic devices

• There are different types of UPS such as standby, line-interactive, and online UPS