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

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

56) When a ceiling fan using a capacitor run motor is switched on, it hums but does not run when it is driven by some external means, it runs in the direction in which it was made to run. The possible cause is

Answer is:

open circuited capacitor

57) Single phase motor whose direction of rotation can not be changed by changing the connection is a

Answer is:

Repulsion induction motor

58) The rating of fuse for the protection of single phase motors should be equal to three times the

Answer is:

full load current

59) As per BIS 1709:1984 recommendation, what is the ohmic value of insulation test conducted between the shorted capacitor terminal and the metal can, when measured by a 500 V megger ?

Answer is:

not less than 100 mega ohms

60) The type of capacitor used in capacitor start motor is

Answer is:

electrolytic capacitor

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