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Single Phase Induction Motors(Engineering > Electrical Engineering ) Questions and Answers
Home
Topic
Engineering
Electrical Engineering
Single Phase Induction Motors
Question 1.
In a split phase motor
the starting winding is connected through a centrifugal switch
the running winding is connected through a centrifugal switch
both starting and running windings are connected through a centrifugal switch
centrifugal switch is used to control supply voltage
Explanation:-
Answer: Option A. ->
the starting winding is connected through a centrifugal switch
Question 2.
In a ceilingfan employing capacitor run motor
secondary winding surrounds the primary winding
primary winding surrounds the secondary winding
both are usual arrangements
none of the above
Explanation:-
Answer: Option A. ->
secondary winding surrounds the primary winding
Question 3.
Which type of load is offered by cranes and hoists ?
Gradually varying load
Non-reversing, no-load start
Reversing, light start
Reversing, heavy start
Explanation:-
Answer: Option D. ->
Reversing, heavy start
Question 4.
Which of the following motors is preferred for tape-recorders?
Shaded pole motor
Hysteresis motor
Two value capacitor motor
Universal motor
Explanation:-
Answer: Option B. ->
Hysteresis motor
Question 5.
Which of the following motors is used in mixies ?
Repulsion motor
Reluctance motor
Hysteresis motor
Universal motor
Explanation:-
Answer: Option D. ->
Universal motor
Question 6.
A hysteresis motor works on the principle of
hysteresis loss
magnetisation of rotor
eddy current loss
electromagnetic induction
Explanation:-
Answer: Option A. ->
hysteresis loss
Question 7.
The value of starting capacitor of a fractional horse power motor will be
100 uF
200 uF
300 uF
400 uF
Explanation:-
Answer: Option C. ->
300 uF
Question 8.
In a two value capacitor motor, the capacitor used for running purposes is
air capacitor
paper spaced oil filled type
ceramic type
a.c. electrolytic type
Explanation:-
Answer: Option B. ->
paper spaced oil filled type
Question 9.
In capacitor start single-phase motors
current in the starting winding leads the voltage
current in the starting winding lags the voltage
current in the starting winding is in phase with voltage in running winding
none of the above
Explanation:-
Answer: Option A. ->
current in the starting winding leads the voltage
Question 10.
In a hysteresis motor, the rotor must have
retentivity
resistivity
susceptibility
none of the above
Explanation:-
Answer: Option A. ->
retentivity
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