Single Phase Induction Motor Multiple Choice Questions - Set 08 - ObjectiveBooks

Single Phase Induction Motor Multiple Choice Questions - Set 08

Practice Test: Question Set - 08

1. If starting winding of a single-phase induction motor is left in the circuit, it will
    (A) Run faster
    (B) Spark at light loads
    (C) Draw excessive current and overheat
    (D) Run slower

2. Which of the following motors is used for unity power factor?
    (A) Hysteresis motor
    (B) Schrage motor
    (C) Universal motor
    (D) Reluctance motor

3. In a hysteresis motor, the rotor must have
    (A) Retentivity
    (B) Resistivity
    (C) Susceptibility
    (D) None of the above

4. Which of the following motors can be run on AC. as well as D.C. supply?
    (A) Universal motor
    (B) Repulsion motor
    (C) Synchronous motor
    (D) Reluctance motor

5. A shaded pole motor can be used for
    (A) Toys
    (B) Hair dryers
    (C) Circulators
    (D) Any of the above

6. The value of starting capacitor of a fractional horse power motor will be
    (A) 100 uF
    (B) 200 uF
    (C) 300 uF
    (D) 400 uF

7. Which of the following motor will give the highest starting torque?
    (A) D.C. shunt motor
    (B) Schrage motor
    (C) Repulsion start and induction run motor
    (D) Universal motor

8. In case of high speed universal motor which of the following needs more attention?
    (A) End play
    (B) Air gap
    (C) Insulation in rotor
    (D) Balancing of rotor

9. Torque developed by a single phase induction motor at starting is
    (A) Pulsating
    (B) Uniform
    (C) None of the above
    (D) Nil

10. Which of the following motors has two separate windings on the motor?
    (A) Repulsion motor
    (B) Repulsion induction motor
    (C) Repulsion start induction run motor
    (D) None of the above

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