51. While selecting motor for an air conditioner which of the following characteristics is of great importance? A. Type of bearings B. Type of enclosure C. Noise D. Arrangement for power transmission 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
52. Besides a constant speed a synchronous rotor possesses which of the following advantages? A. Lower cost B. Better efficiency C. High power factor D. All 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
53. __________ motor is a constant speed motor. A. Synchronous motor B. Schrage motor C. Induction motor D. Universal motor 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
54. Is preferred for automatic drives. A. Squirrel cage induction motor B. Synchronous motors C. Ward Leonard controlled D.C. motors D. Any 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
55. In ________ the speed can be varied by changing the position of brushes. A. Slip ring motor B. Schrage motor C. Induction motor D. Repulsion motor 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
56. Which of the following motors are best for the rolling mills? A. Single phase motors B. Squirrel cage induction motors C. Slip ring induction motors D. D.C. motors 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
57. In which of the following applications variable speed operation is preferred? A. Exhaust fan B. Ceiling fan C. Refrigerator D. Water pump 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
58. Which of the following motors is usually preferred for kiln drives? A. Cascade controlled A.C. motor B. Slip ring induction motor C. Three phase shunt wound commutator motor D. Any of the above 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
59. For crane travel which of the following motors is normally used? A. Synchronous motor B. D.C. differentially compound motor C. Ward-Leonard controlled D.C. shunt motor D. AC. slip ring motor 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
60. For a motor-generator set which of the following motors will be preferred? A. Synchronous motor B. Slip ring induction motor C. Pole changing induction motor D. Squirrel cage induction motor 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
