Electrical Engineering Mcqs Practice Test

Question 1

Temporary magnets are used in______________?

Accepted Answer

D. all of the above

Question 2

For which of the following materials the net magnetic moment should be zero ?

Accepted Answer

C. Antiferromagnetic materials

Question 3

Which of the following statements is correct ?

Accepted Answer

A. The conductivity of ferrites is better than ferromagnetic materials

Question 4

Core of an electromagnet should have____________?

Accepted Answer

C. both of the above

Question 5

Main causes of noisy solenoid are______________?

Accepted Answer

C. both of above

Question 6

Magnetism of a magnet can be destroyed by_____________?

Accepted Answer

D. by all above methods

Question 7

Which of the following methods may be used to convert A.C. system to D.C ?

Accepted Answer

E. All of the above

Question 8

A synchronous converter can be started______________?

Accepted Answer

D. any of the above methods

Question 9

Which of the following are the applications of D.C. system ?

Accepted Answer

E. All of the above

Question 10

In a single phase rotary converter the number of slip rings will be_____________?

Accepted Answer

A. two

Question 11

A rotary converter combines the function of____________?

Accepted Answer

B. a synchronous motor and a D.C. generator

Question 12

With a motor converter it is possible to obtain D.C. voltage only upto__________?

Accepted Answer

D. 1700—2000 V

Question 13

Which of the following is reversible in action ?

Accepted Answer

C. Rotary converter

Question 14

A rotary converter is a single machine with______________?

Accepted Answer

A. one armature and one field

Question 15

A rotary converter in general construction and design, is more or less like___________?

Accepted Answer

D. any D.C. machine

Question 16

Which of the following metals is generally manufactured by electrolysis process ?

Accepted Answer

B. Aluminium

Question 17

Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required ?

Accepted Answer

D. Mercury arc rectifier

Question 18

A rotary converter operates at a______________?

Accepted Answer

B. high power factor

Question 19

In a rotary converter armature currents are______________?

Accepted Answer

C. partly a.c. and partly d.c.

Question 20

In which of the following appUcations, direct current is absolutely essential ?

Accepted Answer

B. Electrolysis