A) rotor shaft B) rotor C) stator D) none of the above. Ans : (B)
A) 60 rpm B) 1440 rpm C) 1500 rpm D) 1560 rpm. Ans : (A)
A) bearing friction is more B) windage losses are excessive C) unbalanced 3 phase supply is given D) airgap is more. Ans : (C)
A) 2 HP, squirrel cage B) 2 HP, single phase C) 2 HP, slip ring D) all have same cost. Ans : (A)
A) 1% B) 4% C) 8% D) 10%. Ans : (B)
A) 27 A B) 20 A C) 8 A D) 4 A. Ans : (C)
A) 14 A B) 21 A C) 28 A D) 42 A. Ans : (A)
A) reduce to one fourth B) reduce to half C) increase four folds D) remain unchanged. Ans : (B)
A) dc compound motor B) universal motor C) dc shunt motor D) dc series motor. Ans : (C)
A) 2 poles B) 4 poles C) 6 poles D) 8 poles. Ans : (B)