31. Insertion of resistance in the stator of an induction motor A. Increases the load torque B. Decreases the starting torque C. Increases the starting torque D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
32. In a star-delta starter of an induction motor A. Resistance is inserted in the stator B. Reduced voltage is applied to the stator C. Resistance is inserted in the rotor D. Applied voltage per stator phase is 57.7% of the line voltage Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
33. The shape of the torque/slip curve of induction motor is A. Parabola B. Hyperbola C. Rectangular parabola D. Straight line Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
34. The auto-starters (using three auto transformers) can be used to start cage induction motor of the following type A. Star connected only B. Delta connected only C. Both (A) and (B) D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
35. In squirrel cage induction motors, the rotor slots are usually given slight skew in order to A. Reduce windage losses B. Reduce eddy currents C. Reduce accumulation of dirt and dust D. Reduce magnetic hum Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
36. In a three-phase induction motor A. Power factor at starting is high as compared to that while running B. Power factor at starting is low as compared to that while running C. Power factor at starting in the same as that while running D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
37. In the circle diagram for induction motor, the diameter of the circle represents A. Slip B. Rotor current C. Running torque D. Line voltage Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
38. In a squirrel cage motor the induced e.m.f. is A. Dependent on the shaft loading B. Dependent on the number of slots C. Slip times the stand still e.m.f. induced in the rotor D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
39. Size of a high speed motor as compared to low speed motor for the same H.P. will be A. Bigger B. Smaller C. Same D. Any of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
40. In an induction motor, no-load the slip is generally A. Less than 1 % B. 1.5 % C. 2 % D. 4 % Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
