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Total Questions : 2607 | Page 261 of 261 pages
Question 2601. 4. In induction motors, power supply is connected to
  1.    Rotor only
  2.    Stator only
  3.    Both rotor and stator
  4.    Any one of (a) or (b) above
 Discuss Question
Answer: Option B. -> Stator only
Question 2602. 7. The phenomenon of hunting is observed in
  1.    Induction motors
  2.    D.C. shunt motors
  3.    D.C. series motor
  4.    Synchronous motor
 Discuss Question
Answer: Option D. -> Synchronous motor
Question 2603. 5. The speed of synchronous motor having 8 poles and operating at 50 c/s power supply will be
  1.    1000 r.p.m.
  2.    600 r.p.m.
  3.    750 r.p.m.
  4.    800 r.p.m.
 Discuss Question
Answer: Option C. -> 750 r.p.m.
Question 2604. 6. Which is false statement about induction motors
  1.    Its speed decreases with increase in load
  2.    Its direction of rotation can be changed by interchanging two phases
  3.    Its speed can't be controlled without sacrificing efficiency
  4.    Its starting torque is more than d.c. shunt motor
 Discuss Question
Answer: Option D. -> Its starting torque is more than d.c. shunt motor
Question 2605. 8. Helical springs are not subjected to
  1.    Hoop stress
  2.    Force 329
  3.    Deflection
  4.    Torsional shear stress
 Discuss Question
Answer: Option A. -> Hoop stress
Question 2606. 0. For traction applications, following type of motor is used
  1.    Induction motor
  2.    Synchronous motor
  3.    D.C. series motor
  4.    D.C. shunt motor
 Discuss Question
Answer: Option C. -> D.C. series motor
Question 2607. 9. The welding units operate at following power factor
  1.    0.3
  2.    0.6
  3.    0.8
  4.    0.9
 Discuss Question
Answer: Option A. -> 0.3

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