Switchgear and Protection

A. Zero
B. Unity
C. Infinity
D. None of the above

A. zero current
B. maximum current
C. minimum voltage
D. maximum voltage

A. single phase motors only
B. two phase motors only
C. two single phase motors running in parallel
D. three phase motors

A. low resistance
B. high resistance
C. low impedance
D. high impedance

A. heavy loads
B. internal short-circuits
C. external short-circuits
D. all of the above

A. Inductance
B. Capacitance
C. Resistance
D. Reactance

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

A. Generators
B. Motors
C. Transmission line
D. Transformers

A. single bus
B. double bus, double breaker
C. main and transfer bus
D. 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