A) 35o C B) 88o C C) 230o C D) 540o C. Ans : (C)
A) magnetic effect of current B) heating effect of current C) electrostatic effect of current D) none of the above. Ans : (B)
A) Plasma B) Dissociated gas C) High temperature gas D) Low temperature gas. Ans : (A)
A) power factor correcting device B) power limiting device C) voltage limiting device D) current limiting device. Ans : (D)
A) 80o C B) 100o C C) 140o C D) 240o C. Ans : (C)
A) measurement of high dc voltage B) measurement of high ac voltage C) measurement of impulse voltage D) all of the above. Ans : (D)
A) use of surge diverters B) low tower footing resistance C) use of overhead ground wires D) any of the above. Ans : (D)
A) Sealing problem of gas B) In flux of moisture in the gas system is dangerous C) Deterioration of quality of circuit breakers affects reliability of circuit breaker D) All of the above. Ans : (D)
A) more at lower pressure and low at higher pressures B) more than that of oil used in OCB C) less than that of oil used in OCB D) less than that of air at atmospheric pressure. Ans : (C)
A) reduces to SF3 B) gets oxidized C) decomposes into SF4 and SF2 D) decomposes into S and F ions. Ans : (C)