A) Lenz’s law B) Newton’s law C) Faraday’s law of electromagnetic induction D) Fleming’s right hand rule. Ans : (A)
A) s = 2.5, f = 125 B) s = 4.0, f = 2.0 C) s = 4.0, f = 2.5 D) s = 4.0, f = 20. Ans : (B)
A) 100 Hz B) 50 Hz C) 25 Hz D) 16 2/3 Hz. Ans : (D)
A) zero B) minimum C) maximum D) same as during running. Ans : (C)
A) 0.03 kW B) 1.2 kW C) 1 kW D) 3 kW. Ans : (B)
A) 8 kW B) 4 kW C) 2 kW D) 0.2 kW. Ans : (C)
A) shaft output in watts B) combined stator and rotor input in watts C) stator input in watts D) rotor input in watts. Ans : (D)
A) leading power factor B) higher efficiency C) more breakdown torque D) less breakdown torque. Ans : (C)
A) fluctuating loads are anticipated B) frequent starting is necessary C) low starting torque is desired D) high starting torque is desired. Ans : (D)
A) high operating speeds B) reduced starting torque C) slowing down of rotor under load D) (B) and (C) Ans : (D)