A) rotor Cu loss/rotor output B) rotor Cu loss/rotor input C) rotor Cu loss/state Cu loss D) none of above. Ans : (B)
A) to reduce rotor Cu-loss B) to increase starting torque C) to increase pull out torque D) to improve efficiency. Ans : (D)
A) 16% B) 8% C) 4% D) 2%. Ans : (A)
A) 1200 watts B) 625 watts C) 600 watts D) 300 watts. Ans : (B)
A) Smaller than that Y B) Equal to the of Y C) Larger than Y D) May be either larger or smaller. Ans : (C)
A) stator winding B) stator core and stator teeth C) rotor core and rotor teeth D) stator and rotor. Ans : (B)
A) Line voltage B) Line current C) Power D) Torque. Ans : (A)
A) a squirrel cage motor is started with auto transformer starter B) a slip ring induction motor is started with star-delta starter C) a squirrel cage motor is started by direct-on-line starter D) a slip ring induction motor is started with rotor resistance starter. Ans : (D)
A) Synchronous speed (Ns) B) Rotor speed (N) C) Speed = Ns - N D) A speed higher than synchronous speed. Ans : (A)
A) 1030 rpm B) 1010 rpm C) 990 rpm D) 970 rpm. Ans : (C)