# Objective Questions on Single Phase Motors | Part 2

- Link: https://studyelectrical.com/2013/12/objective-questions-on-single-phase-motors-2.html
- Published: 2013-12-06T12:16:00+00:00
- Author: 

 

[Part 1](http://www.studyelectrical.com/2014/08/objective-questions-on-single-phase-motors.html)
[Part 2](https://www.blogger.com/blogger.g?blogID=137989955521172150#page2)[Part 3](http://www.studyelectrical.com/2014/12/objective-questions-on-single-phase-motors-3.html)
[Part 4](http://www.studyelectrical.com/2014/12/objective-questions-on-single-phase-motors-4.html)
[Part 5](http://www.studyelectrical.com/2014/12/objective-questions-on-single-phase-motors-5.html)

16. Single phase motors are commercially manufactured up to

  A   1 H.P.
   B   2 H.P.   C   5 H.P.   D   10 H.P.

 17. The direction of rotation of universal motor can be reversed by    A   reversing
the supply terminals   B   switching over from ac to dc   C   interchanging the 
brush leads   D   any of the above.               18. A universal motor operates
on    A   constant speed and varying load   B   constant load and varying speed 
C   approximately constant speed and load   D   synchronous speed with varying load.
19. 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.               20. A motor suitable for signaling device is    A   induction
motor   B   dc shunt motor   C   dc series motor   D   reluctance motors.

             21. Which capacitor is preferred in case of single phase motor    
A   Paper capacitor   B   Ceramic capacitor   C   Mica capacitor   D   Electrolytic
capacitor.               22. The motor used for driving the record player deck is
A   dc series motor   B   synchronous motor   C   hysteresis motor   D   dc shunt
motor.               23. When a motor speed of 5000 rpm is required, which motor
will you select ?    A   Capacitor start motor   B   Shaded pole motor   C   Hysteresis
motor   D   Universal motor.               24. As compared to other single phase
ac motors a universal motor has    A   speed ratio of 2   1 on ac/dc   B   highest
efficiency on 50 Hz supply   C   high horse power/kg ratio   D   all of the above.
25. When a universal motor is operated on no load, its speed is limited by    A 
armature reaction   B   armature weight   C   windage and friction   D   supply 
voltage frequency.               26. Which of the following applications make use
of a universal motor ?    A   Floor polishing machine   B   Oil expeller   C   Portable
tools   D   Lathe machines.               27. In portable tools the speed of the
driven shaft is reduced by    A   Gearing   B   Belt drive   C   Chain drive   D
Fluid coupling.               28. For ceiling fans generally the single phase motor
used is    A   split phase type   B   capacitor start type   C   capacitor start
and run type   D   permanent capacitor type.               29. In case of split 
phase motors the phase shift is usually limited to    A   3 degrees   B   60 degrees
C   90 degrees   D   150 degrees.

[⌊MCQ⌉⌊MCQ⌉[

   30. The capacitance of a small single phase motor will be of the order of   
A   Kilo farads   B   Few hundred farads   C   Farads   D   Micro or pico farads.

[Part 1](http://www.studyelectrical.com/2014/08/objective-questions-on-single-phase-motors.html)
[Part 2](https://www.blogger.com/blogger.g?blogID=137989955521172150#page2)[Part 3](http://www.studyelectrical.com/2014/12/objective-questions-on-single-phase-motors-3.html)
[Part 4](http://www.studyelectrical.com/2014/12/objective-questions-on-single-phase-motors-4.html)
[Part 5](http://www.studyelectrical.com/2014/12/objective-questions-on-single-phase-motors-5.html)

 

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