SWITCH GEAR QUIZ

Outdoor switchgear is generally used for voltage beyond

11 kV

132 kV

66 kV

33 kV

TRUE ANSWER : ?
YOUR ANSWER : ?

The short circuit in any winding of the transformer is the result of

mechanical vibration

insulation failure

loose connection

impulse voltage

TRUE ANSWER : ?
YOUR ANSWER : ?

To limit short-circuit current in a power system are used

earth wires

H.R. fuses

reactors

isolators

TRUE ANSWER : ?
YOUR ANSWER : ?

The operating time of a circuit breaker is

0.05 sec

0.001 sec

0.002 sec

0.2 sec

TRUE ANSWER : ?
YOUR ANSWER : ?

An isolator is designed to open a circuit under

None of these

no load

full load

normal conditions

TRUE ANSWER : ?
YOUR ANSWER : ?

A three phase circuit breaker is rated at 2000 MVA, 33 kv. The symmetrical breaking current is

80 kA

35 kA

60 kA

20 kA

TRUE ANSWER : ?
YOUR ANSWER : ?

Wave trap is used to trap waves of

higher frequencies entering generator or transformer units

power frequencies

either of the above

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A fuse should have

high conductivity

All of these

low cost

low melting point

TRUE ANSWER : ?
YOUR ANSWER : ?

The fuse wire, in D.C. circuits, is inserted in

positive circuit only

none of the listed here

Both of the listed here

negative circuit only

TRUE ANSWER : ?
YOUR ANSWER : ?

Minimum arcing voltage will be least in case of

graphite

tungsten

carbon

silver

TRUE ANSWER : ?
YOUR ANSWER : ?

↑