☰ Induction Machines (Electrical Engineering) - MCQs

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Q7.

a squirrel cage induction motor is not favoured when ______ is the main consideration

  • A. inertia cost
  • B. maintenance cost
  • C. high starting torque
  • D. higher efficiency and higher power factor
    ✍ Discuss    
Q8.

the outer cage of a square consists of

  • A. manganese brass
  • B. red copper
  • C. bronze
  • D. steel
    ✍ Discuss    
Q9.

jogging of an induction motor is

  • A. energizing a motor once or repeatedly to have same movements for mechanisms
  • B. a process of synchronisation
  • C. a method of breaking
  • D. none of the above
    ✍ Discuss    
Q10.

an induction motor with large number of slots has _______ overload capacity

  • A. low
  • B. large
  • C. no effect on
  • D. none of these
    ✍ Discuss    
Q11.

the cogging occurs in induction motors due to

  • A. harmonic induction torques
  • B. harmonic synchronous torque
  • C. vibration torques
  • D. both a and b
    ✍ Discuss    
Q12.

presence of 5th harmony in induction motor causes

  • A. cogging
  • B. crawling
  • C. small reverse braking torque
  • D. hunting
    ✍ Discuss    
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