Lakshya Education MCQs

Question: In a capacitor start motor, the phase displacement between starting and running winding can be nearly
Options:
A.10°
B.30°
C.60°
D.90°
Answer: Option D

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Question 1. In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to
  1.    improve power factor
  2.    increase overload capacity
  3.    reduce fluctuations in torque
  4.    to improve torque
Answer: Option A
Question 2. Which of the following single-phase induction motors is generally used in time phonographs?
  1.    Resistance start
  2.    Capacitor start capacitor run
  3.    Shaded pole
  4.    Universal
Answer: Option C
Question 3. After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on
  1.    running winding
  2.    rotor winding
  3.    field winding
  4.    compensating winding
Answer: Option A
Question 4. In split-phase motor auxiliary winding is of
  1.    thick wire placed at the bottom of the slots
  2.    thick wire placed at the top of the slots
  3.    thin wire placed at the top of the slots
  4.    thin wire placed at the bottom of the slots
Answer: Option C
Question 5. Which of the following motor will have relatively higher power factor ?
  1.    Capacitor run motor
  2.    Shaded pole motor
  3.    Capacitor start motor
  4.    Split phase motor
Answer: Option A
Question 6. Which of the following motor will give relatively high starting torque ?
  1.    Capacitor start motor
  2.    Capacitor run motor
  3.    Split phase motor
  4.    Shaded pole motor
Answer: Option A

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