Electrical Machine Design MCQ Questions & Answers

71

A direct current can be measured by

A) a D.C. potentiometer directly B) a D.C. potentiometer in conjunction with a standard resistance C) a D.C. potentiometer in conjunction with a volt ratio box D) none of the above

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Answer & Solution

Answer: Option B

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72

The gravity controlled instrument has crowded scale because current is proportional to

A) balancing weight B) deflection angle C) sine of deflection angle D) All of the above

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Answer & Solution

Answer: Option C

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73

Which of the following is an essential part of a motor meter ?

A) An operating torque system B) A braking device C) Revolution registering device D) All of the above

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Answer & Solution

Answer: Option D

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74

Aluminium when adopted as a conductor material in ______ transformers, decreases the overall cost of the transformer

A) small size B) medium size C) large size D) any of the above size

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Answer & Solution

Answer: Option A

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75

Commonly used standard capacitor is

A) spherical type B) concentric cylindrical type C) electrostatic type D) multilayer parallel plate type

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Answer & Solution

Answer: Option B

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76

Damping of the Ballistic galvanometer is made small to

A) get first deflection large B) make the system oscillatory C) make the system critically damped D) get minimum overshoot

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Answer & Solution

Answer: Option A

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77

The high voltage winding is usually which of the following type ?

A) Cylindrical winding with circular conductors B) Cross-over winding with either circular or small rectangular conductors C) Continuous disc type winding with rectangular conductors D) All of the above types

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Answer & Solution

Answer: Option D

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78

The change in flux linkages can be caused in which of the following ways ?

A) The flux is constant with respect to time and is stationary and the coil moves through it B) The coil is stationary with respect to flux and the flux varies in magnitude with respect to time C) Both the changes mentioned above occur together, i.e., the coil moves through a time vary-ing field D) All of the above

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Answer & Solution

Answer: Option D

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79

In a D.C. machine the number of brush arms is _____ the number of poles.

A) less than B) equal to C) greater than D) none of the above

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Answer & Solution

Answer: Option B

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80

The operation of a D.C. machine with large air gap lengths is comparatively

A) quiet B) noisy C) either of the above D) none of the above

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Answer & Solution

Answer: Option A

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Electrical Machine Design MCQ Questions & Answers | Electrical Engineering