a) Number of poles b) Speed of the exciter c) Exciter current d) Strength of the magnetic field Ans: (d)
a) Less noisy b) Costlier c) Larger in size d) More efficient Ans: (c)
a) Concentrated winding to distributed winding b) Distributed winding to full pitch winding c) Full pitch winding to distributed winding d) Distributed winding to concentrated winding Ans: (b)
a) Governor b) Differential protection c) Alarm d) Overcurrent relay Ans: (a)
a) Inter-turn fault protection b) Sensitive earth fault protection c) Biased differential protection d) All of these Ans: (d)
a) Heating of rotor b) Vibrations c) Double frequency currents in the rotor d) All of these Ans: (d)
a) ± 1% b) ± 2% c) ± 4% d) ± 6% Ans: (b)
a) Power factor of the load b) Amount of current drawn from the alternator c) Speed of the prime mover driving the alternator d) None of these Ans: (a)
a) Magnetizing b) Demagnetizing c) Cross-magnetizing d) None of these Ans: (a)
a) N times the fundamental emf b) Equal to the fundamental emf c) Less than the fundamental emf d) Zero Ans: (c)