A) 4.5 Hz B) 45 Hz C) 54 Hz D) 60 Hz. Ans : (A)
A) four time the kinetic energy stored B) three time the kinetic energy stored C) twice the kinetic energy stored D) equal to kinetic energy stored. Ans : (B)
A) run normally B) run with more noise C) run at lower speed D) not start. Ans : (D)
A) burning of at least two phase windings B) burning of one phase winding C) burning of all three phase windings D) none of the above. Ans : (B)
A) low supply voltage B) over loading C) loss of ventilation D) any of the above. Ans : (D)
A) 1 B) 2 C) 4 D) 8. Ans : (C)
A) 976 rpm B) 488 rpm C) 244 rpm D) 122 rpm. Ans : (B)
A) at full torque B) at no load C) at full load D) at stand still. Ans : (D)
A) Stator-rotor starter B) Direct-on-line started C) Star-delta starter D) All of the above. Ans : (A)
A) Rotor is open circuit but is blocked from rotation B) Rotor is short circuit but is blocked from rotation C) Rotor is open circuit but is free to rotate D) None of the above. Ans : (B)