a) Earth faults b) Interphase faults c) Both (a) and (b) d) None of these Ans: (c)
a) Transformer b) Alternator c) Overhead lines d) C.T., P.T. Ans: (d)
a) Speed & reliability b) Aped & sensitivity c) Adequateness & selectivity d) All of these Ans: (d)
a) Improve neutral wire’s current capacity b) Avoid overheating of transformer c) Provide artificial earthing d) Avoid harmonics Ans: (c)
a) Inter-turn faults b) Heavy Loads c) External Faults d) Magnetizing current Ans: (d)
a) Over voltage b) Short circuits c) Over current d) All of these Ans: (b)
a) Permanent moving magnet b) Induction cup c) Shaded pole d) Moving coil Ans: (a)
a) In three zones b) In two zones c) Independent of zone d) None of these Ans: (a)
a) Current b) Power c) Voltage d) Impedance Ans: (d)
a) Over load faults b) Over voltage c) Inter turn faults d) All of these Ans: (c)