Lesson 7 of 26 • 33 upvotes • 15:00mins
150. If one phase of supply goes off in the case of 3-phase induction motor, the motor (a) Comes to a stop (b) Draws double the initial current and continues to run (c) Draws 1/ 3 times the initial current and continues to run (d) None of the above. 151. Induction generator works between the slip (a) 1 < s < 2 (b) 0.1 < s < 1.0 (c) s < 0.0 (d) None of the above. 152. The motor which can be used on both a.c. and d.c. is (a) Reluctance motor (b) Induction motor (c) d.c. series motor (d) None of the above. 153. If transformer frequency is changed from 50 Hz to 60 Hz, the ratio of eddy current loss 50 Hz to 60 Hz at constant voltage is (a) 5/6 (b) 25/36 (c) 6/5 (d) 1.0. 154. An alternator of 300 kW is driven by a prime mover of speed regulation 4% and another alternator of 200 kW driven by a prime mover of speed regulations 3%, the total load they can take is (a) 500 kW (b) 567 kW (c) 425 kW (d) 257 kW
26 lessons • 5h 27m
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CL Wadhwa Bits Solutions (125-129)
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