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Electrician
Electrician Set-1
Single Phase Motors
28

Single Phase Motors MCQ - Electrician (Set-1) with Answers

28) A universal motor gives electric shock to the operator. The possible reasion is :

earthed field winding

short-circuited armature winding

motor is run above its rated speed

applied voltage is high

Answer is:

earthed field winding

Single Phase Motors MCQ - Electrician (Set-1) with Answers

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Related Single Phase Motors MCQ - Electrician (Set-1) with Answers

29) Which of the following single phase motors will be cheapest ?

Capacitor-start motor

Capacitor-run motor

Repulsion-start induction-run motor

Double capacitor motor

Answer is:

Capacitor-start motor

30) What is/are the shortcomings of repulsion motors ?

Variation of speed with load

Low power factor

Tendency to produce sparking at the brushes

All the above

Answer is:

All the above

31) For the same rating the size of the single phase induction motor is about _____ that of the corresponding three phase induction motor

three times

the same as

1.5 times

one-third

Answer is:

1.5 times

32) For speeds higher than 3000 R.P.M., the machine used is

induction motor

synchronous motor

universal motor

none of the above

Answer is:

universal motor

Single Phase Motors MCQ - Electrician (Set-1) with Answers

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