a) High pressure and low velocity. b) High pressure and high velocity. c) Low pressure and low velocity. d) Low pressure and high velocity. Ans: (c)
a) 10,000 amp b) 100 amp c) 1 amp d) 1 microampere Ans: (a)
a) Much less than any CB. b) Mush more than any CB. c) Equal to the CB. d) None of the above is necessary. Ans: (a)
a) Circuit breaker. b) Protective relay. c) Inductor in the neutral. d) Capacitor in the neutral. Ans: (c)
a) Air break C.B. b) Oil C.B. c) Vacuum C.B. d) M.O. C.B. Ans: (c)
a) Circular b) Spiral c) Elliptic Ans: (b)
a) Voltage restrained directional relay. b) Voltage controlled over current relay. c) Directional restrained over current relay. d) Directional restrained over voltage relay. Ans: (a)
a) 6 b) 4 c) 3 d) 2 Ans: (d)
a) Long transmission lines. b) Medium length lines. c) Short length lines. d) No length criterion. Ans: (a)
a) Bulk oil circuit breakers. b) Minimum oil circuit breakers. c) Air blast circuit breakers. d) All types of breakers. Ans: (c)