Category: Switchgear and Protection

A. relay
B. rewirable fuse
C. H.R.C. only
D. all of the above

A. generators
B. busbars
C. transformers
D. motors
E. all of the above

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

A. protect the line
B. open the circuit
C. protect the appliance
D. prevent excessive currents
E. none of the above

A. Photoelectric effect
B. Electrostatic effect
C. Heating effect
D. Magnetic effect

A. two currents
B. two voltages
C. two or more similar electrical quantities
D. none of the above

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

A. earth wires
B. isolators
C. H.R.C. fuses
D. reactors

A. 11 kV
B. 33 kV
C. 60kV
D. 110kV

A. delayed trip action
B. instantaneous trip action
C. both of the above
D. none of the above