SarkariResultOutAdditional Assistant Engineer (Electrical) · 2026

Previous Year Question

What is the primary function of grounding in an electrical installation?

To provide a safe route for fault current to the earth
To reduce the total energy usage of connected equipment
To enhance the brightness of lighting circuits
To increase the voltage supplied to electrical devices

Correct answer: A

Explanation

Protective grounding provides a low-impedance path for fault current so protective devices can operate quickly and exposed conductive parts remain near earth potential. Its primary purpose is safety.

Step-by-step solution

Fault-Current Path to Earth explanatory diagram

Correct Answer

A — To provide a safe route for fault current to the earth

Explanation

Protective grounding provides a low-impedance path for fault current so protective devices can operate quickly and exposed conductive parts remain near earth potential. Its primary purpose is safety.

Key Concept

Fault-Current Path to Earth

Exam Point

Grounding is for fault-current safety, not normal load operation.

Exam tip

Grounding is for fault-current safety, not normal load operation.

Quick method

Grounding is for fault-current safety, not normal load operation.