Single Phase Induction Motor mcq objective questions and answers part2

Q1. Which of the following applications would need the smallest size of motor ?
(A) Domestic motor
(B) Electric clock
(C) Table fan
(D) Sewing machine.

Q2. A motor generally used in toys is
(A) Hysteresis motor
(B) Shaded pole motor
(C) Two value capacitor motor
(D) Reluctance motor.

Q3. Which of the following is non-reversible motor ?
(A) Universal motor
(B) Capacitor start split phase motor
(C) Resistance start split phase motor
(D) Permanent split capacitor motor

Q4. The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be
(A) at the end connections
(B) at the end terminals
(C) anywhere on the winding inside a slot
(D) at the slot edge where coil enters or comes out of the slot

Q5. The value of starting capacitor of a fractional horse power motor will be
(A) 100 uF
(B) 200 uF
(C) 300 uF
(D) 500 uF

Q6. In a shaded pole single-phase motor, the revolving field is produced by the use of
(A) inductor
(B) capacitor
(C) resistor
(D) shading coils

Q7. Which motor will make least noise ?
(A) Capacitor motor
(B) Universal motor
(C) Shaded pole motor
(D) Hysteresis motor

Q8. In case of split phase motors the phase shift is usually limited to
(A) 3 degrees
(B) 60 degrees
(C) 90 degrees
(D) 120 degrees.

Q9. In portable tools the speed of the driven shaft is reduced by
(A) Gearing
(B) Belt drive
(C) Chain drive
(D) Fluid coupling

Q10. A motor suitable for signaling device is
(A) induction motor
(B) dc shunt motor
(C) dc series motor
(D) reluctance motors

Q11. Which of the following single phase motors will operate at high power factor ?
(A) shaded pole motor
(B) capacitor run motor
(C) split phase motor
(D) capacitor start motor

Q12. Single phase motors are commercially manufactured up to
(A) 1H.P.
(B) 2 H.P.
(C) 5 H.P.
(D) 15 H.P.

Q13. Which of the following motors can be used for unity power factor ?
(A) Capacitor run motor
(B) Shaded pole motor
(C) Hysteresis motor
(D) Schrage motor

Q14. The wattage rating for a ceiling fan motor will be in the range
(A) 200 to 350 W
(B) 250 to 500 W
(C) 50 to 150 W
(D) 10 to 60 W

Q15. The wattage of motor for driving domestic sewing machine will be around
(A) 100 to 150 W
(B) 40 to 75 W
(C) 10 to 50 W
(D) 50 to 100 W

Q16. Which of the following single-phase induction motors is generally used in time phonographs?
(A) Resistance start
(B) Capacitor start capacitor run
(C) Shaded pole
(D) Universal

Q17. Under normal operating conditions which motor can run at 5000 rpm ?
(A) Synchronous motor
(B) Induction motor
(C) Universal motor
(D) All of these

Q18. A capacitor start, capacitor run single phase induction motor is basically a
(A) ac series motor
(B) dc series motor
(C) 2 phase induction motor
(D) 3 phase induction motor.

Q19. The starting capacitor of a single phase motor is
(A) Electrolytic capacitor
(B) Ceramic capacitor
(C) Paper capacitor
(D) None of the above.

Q20. If the capacitor of a single-phase motor is short-circuited
(A) the motor will not start
(B) the motor will run
(C) the motor will run in reverse direction
(D) the motor will run in the same direction at reduced r.p.m.