MCQs
Total Questions : 473
| Page 45 of 48 pages
Answer: Option B. -> inductance connection
Answer: Option A. -> high starting current at full voltage would damage the windings
Answer: Option A. -> Continue to run in the same direction
Answer: Option B. -> 25 Hz
Answer: Option D. -> 4,1,2,3
Answer: Option B. -> 1 and 2 are correct
Question 447. 4. Consider the following statements about the operation of a three-phase induction motor running at full load : If one of the supply line fuse blows off, the motor will stall. 2. continue to run with increased slip, 3. continue to run with normal supply current 4. continue to run with excessive supply current Of these statements
Answer: Option D. -> 2 and 4 are correct
Question 448. 7. In a 3-phase induction motor, if the angular speed of the stator field is w and, the actual angular speed of the rotor is wr, and the stator induced emf is given by es = N1 wKws Qisin wt, (N1 being the stator turns/phase), the rotor emf with N2 as the rotor/turns phase will be (Kws = stator winding factor and Kwr =rotor winding factor)
Answer: Option A. -> er = N2 co Kwr sin cot
Answer: Option C. -> no zig-zag leakage
Answer: Option C. -> because the induced secondary voltage and hence the currents in the windings are abnormally high during starting