Transmission And Distribution MCQ Questions & Answers

Transmission And Distribution MCQ Questions & Answers | Electrical Engineering

Learn Transmission And Distribution MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Transmission And Distribution MCQ question is the important chapter for a Electrical Engineering and GATE students. Page-5 section-1

The use of strain type insulators is made where the conductors are

A) Dead ended B) At intermediate anchor towers C) Any of the above D) None of the above

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Answer & Solution

Answer: Option C

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As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only

A) 31.25 percent of copper B) 33.3 percent of copper C) 66.7 percent of copper D) 125 percent of copper

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Answer & Solution

Answer: Option A

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A circuit is disconnected by isolators when

A) Line is energized B) There is no current in the line C) Line is on full load D) Circuit breaker is not open

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Answer & Solution

Answer: Option B

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Large industrial consumers are supplied electrical energy at

A) 400 V B) 11 kV C) 66 kV D) 400 kV

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Answer & Solution

Answer: Option C

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In a substation the following equipment is not installed

A) Exciters B) Series capacitors C) Shunt reactors D) Voltaire transformers

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Answer & Solution

Answer: Option A

Solution:

Definition: A substation is a part of the power system used to transform voltage levels, control power flow, and provide protection and switching operations.

Equipment in substations: Common equipment includes series capacitors for voltage support, shunt reactors for reactive power control, and voltage transformers for measurement and protection purposes.

About exciters: Exciters are devices used to supply DC field current to the rotor winding of synchronous machines such as generators or motors. They are installed in power plants or generator systems, not in substations.

Reason: Since substations do not contain generating units, there is no need for exciters, making them absent from substation installations.

Conclusion: Among the given options, exciters are not installed in substations.

The distributors for residential areas are

A) Single phase B) Three-phase three wire C) Three-phase four wire D) None of the above

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Answer & Solution

Answer: Option C

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The material commonly used for insulation in high voltage cables is

A) Lead B) Paper C) Rubber D) None of the above

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Answer & Solution

Answer: Option B

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The material generally used for armour of high voltage cables is

A) Aluminium B) Steel C) Brass D) Copper

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Answer & Solution

Answer: Option B

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Which of the following bus-bar schemes has the lowest cost?

A) Ring bus-bar scheme B) Single bus-bar scheme C) Breaker and a half scheme D) Main and transfer scheme

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Answer & Solution

Answer: Option B

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Corona usually occurs when the electrostatic stress in air around the conductor exceeds

A) 6.6 kV (r.m.s. value)/cm B) 11 kV (r.m.s. value)/cm C) 22 kV (maximum value)/cm D) 30 kV (maximum value)/cm

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Answer & Solution

Answer: Option D

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