A) lag B) slip C) back lash D) regulation. Ans : (B)
A) 0.5 % B) 1% C) 5% D) 10%. Ans : (C)
A) Blocked rotor test B) No load test C) Open circuit test D) Any of the above. Ans : (A)
A) dc only B) ac only C) both ac and dc D) none of them. Ans : (B)
A) 1.5 Hz B) 3 Hz C) 15 Hz D) 150 Hz. Ans : (A)
A) 750 rpm B) 744 rpm C) 713.5 rpm D) 727.5 rpm. Ans : (D)
A) its power factor goes on increasing upto full load then it falls again B) its power factor goes on increasing C) its power factor goes on decreasing D) its power factor remains unchanged. Ans : (A)
A) low voltage B) high load C) harmonics developed in the motor D) jammed bearings. Ans : (C)
A) 50% B) 10% C) 5% D) 2.5%. Ans : (B)
A) P/s B) P/s2 C) s2P D) sP. Ans : (D)