SWITCH GEAR QUIZ

high speed and selectivity

All of these

economy and simplicity

good selectivity and reliability

fault occurs on the bus itself

fault occurs with respect to earthing

two or more faults occur simultaneously

fault occurs on neutral line

resistance, reactance and impedance

All of these

temperature

voltage and current

1500 A

1500/√3 A

None of these

750 A

short-circuit faults only

both open and short-circuit faults

None of these

open-circuit faults only

transmission line

motor

feeder

generator

Load flow, short-circuit and stability

Load flow

Load flow and short-circuit

Load flow and stability

oil circuit breaker

air-blast circuit breaker

vaccum circuit breaker

sf 6 circuit breaker

current controlling device

current limiting device

protective device

None of these

either of the above

power frequencies

higher frequencies entering generator or transformer units

None of these