Indian Electricity Rules MCQ|IE Rules Questions

In this posts, Indian Electricity Rule MCQ Questions and Answers are given. The Detailed IE rules are given in another Post IE Rules.

Contents

How many earth connections are required for the motor frame as per the IE rule 61?

One
Two separate and distinct
Three separate and distinct
All of these

Ans: Two separate and distinct

IE Rule 61 (2): The frame of every generator, stationary motor, portable motor, and the metallic parts (not intended as conductors) of all transformers and any other apparatus used for regulating or controlling energy and all medium voltage energy consuming apparatus shall be earthed by the owner by two separate and distinct connections with earth.

According to the electricity rule, which type of pole is not used in the overhead line?

Concrete poles
Rail electric poles
Silicon PVC poles

Ans: Silicon PVC poles

Types of poles used in overhead line

1.) Wooden poles

These are made of seasoned wood (sal or chir) and are suitable for lines of the moderate X-sectional area and of relatively shorter spans, say up to 50 meters.

Such supports are cheap, easily available, provide insulating properties, and, therefore, are widely used for distribution purposes in rural areas as an economic proposition.

These cannot be used for voltages higher than 20 kV.

2.) Steel poles

Steel poles are often used as a substitute for wooden poles.
They possess greater mechanical strength, and longer life and permit longer spans to be used.
Such poles are generally used for distribution purposes in the cities.

3.) RCC poles

The reinforced concrete poles have become very popular as line supports in recent years.

They have greater mechanical strength, longer life, and permit longer spans than steel poles.
Moreover, they give a good outlook, require little maintenance, and have good insulating properties.