A. 2
B. 4
C. 6
D. 10
Related Mcqs:
- The fuse wire, in D.C. circuits, is inserted in____________?
A. negative circuit only
B. positive circuit only
C. both (A) and (B)
D. either (A) or (B) - A _________ is used to measure the stator % winding temperature of the generator?
A. thermocouple
B. pyrometer
C. resistance thermometer
D. thermometer - Arc in a circuit behaves as_______________?
A. a capackive reactance
B. an inductive reactance
C. a resistance increasing with voltage rise across the arc
D. a resistance decreasing with voltage rise across the arc - Air blast circuit breaker is used for_____________?
A. over currents
B. short duty
C. intermittant duty
D. repeated duty - A differential relay measures the vector difference between_________________?
A. two currents
B. two voltages
C. two or more similar electrical quantities
D. none of the above - The current zero interruption, in oil and air blast circuit breakers, is achieved by____________?
A. lengthening of the gap
B. cooling and blast effect
C. both (A) and (B)
D. deionizing the oil with forced air
E. none of the above - Which of the following statements is incorrect ?
A. Lightning arrestors are used before the switchgear
B. Shunt reactors are used as compensation reactors
C. The peak short current is (1.8 xV2) times the A.C. component
D. The MVA at fault is equal to base MVA divided by per unit equivalent fault reactance - relay is preferred for phase fault on short transmission line?
A. Induction type
B. Reactance
C. Impedance
D. None of the above - By which of the following methods major portion of the heat generated in a H.R.C. fuse is dissipated ?
A. Radiation
B. Convection
C. Conduction
D. All of the above - Oil switches are employed for_____________?
A. low currents circuits
B. low voltages circuits
C. high voltages and large currents circuits
D. all circuits
