East India Udyog Senior Electrical Engineer Interview Questions and Answers

Gravels are used in switch yards to provide a stable surface for equipment and to improve drainage.

• Gravels help in reducing the risk of equipment damage due to flooding or standing water.

• They also help in preventing erosion and maintaining the stability of the ground.

• Gravels are easy to install and maintain, making them a cost-effective option for switch yards.

• They allow for better heat dissipation, which is important ...read more

A Single Line Diagram (SLD) of a 33/11 kV switchyard shows the layout and connections of electrical equipment.

• Key equipments include transformers, circuit breakers, isolators, busbars, surge arresters, and control panels.

• Transformers step down voltage from 33 kV to 11 kV for distribution.

• Circuit breakers protect the system from overloads and short circuits.

• Isolators are used for isolating equipment for maintenance.

• Busb...read more

OC and SC tests are conducted on transformers to determine their efficiency and performance under different load conditions.

• OC test (Open Circuit test) is conducted to determine the no-load loss and magnetizing impedance of the transformer.

• SC test (Short Circuit test) is conducted to determine the full-load copper loss and equivalent resistance of the transformer.

• Both tests help in evaluating the efficiency and voltage...read more