Electrical Machine Design MCQ Questions & Answers

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Each section contains 100 MCQs on Electrical Machine Design .

Commercial available medium size machines have a speed range of ______ .

A) 200 to 400 r.p.m. B) 600 to 1000 r.p.m. C) 1000 to 1500 r.p.m. D) 2000 to 2500 r.p.m.

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

The usual values of maximum flux densities for distribution transformers using hot rolled silicon steel are

A) 0.5 to 0.8 Wb/m² B) 0.8 to 1.0 Wb/m² C) 1.1 to 1.35 Wb/m² D) 1.4 to 1.8 Wb/m²

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The electrical power to a meggar is provided by

A) battery B) permanent magnet D.C. generator C) A.C. generator D) any of the above

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

In D.C. machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made

A) equal to that of armature mmf B) less in comparison with the armature mmf C) large in comparison with the armature mmf D) none of the above

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Various adjustments in an energy meter include

A) light load or friction B) lag and creep C) overload and voltage compensation D) temperature compensation E) all of the above

Discuss

Answer & Solution

Answer: Option E

No explanation is given for this question. Let's Discuss on Board

For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used?

A) 1.0 to 1.2 A/mm² B) 1.5 to 2.0 A/mm² C) 2.2 to 3.2 A/mm² D) 3.2 to 4.2 A/mm²

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The rectifier instrument is not free from

A) temperature error B) wave shape error C) frequency error D) all of the above

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Instrument transformers are

A) potential transformers B) current transformers C) both (A) and (B) D) power transformers

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

In order to achieve high accuracy, the slide wire of a potentiometer should be

A) as long as possible B) as short as possible C) neither too small not too large D) very thick

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

In D.C. machines the number of slots per pole usually lies

A) between 2 to 4 B) between 6 to 8 C) between 9 to 16 D) between 20 to 30

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

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Electrical Machine Design MCQ Questions & Answers | Electrical Engineering