SWITCH GEAR QUIZ

A circuit breaker must perform the duty of

opening the faulty circuit and breaking the fault current

All of these

carrying fault current for a short time

being closed on to a fault

TRUE ANSWER : ?
YOUR ANSWER : ?

series reactors should have

high impedance

low resistance

low impedance

high resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

The single phasing relays are used for the protection of

two phase motors only

single phase motors only

three phase motors

two single phase motors running in parallel

TRUE ANSWER : ?
YOUR ANSWER : ?

The making capacity of a circuit breaker is equal to

2.55 × symmetrical breaking capacity

√3 × symmetrical breaking capacity

√2 × symmetrical breaking capacity

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The fusing factor is

None of these

always less than 1

always 1

always more than 1

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following CB's is generally used in railways applications ?

bulk oil circuit breaker

air break circuit breaker

low oil circuit breaker

sf 6 circuit breaker

TRUE ANSWER : ?
YOUR ANSWER : ?

A fuse performs

None of these

detection function only

circuit interruption function only

both detection and interruption functions

TRUE ANSWER : ?
YOUR ANSWER : ?

A.C. network analyzer is used to solve problems of

Load flow and stability

Load flow, short-circuit and stability

Load flow and short-circuit

Load flow

TRUE ANSWER : ?
YOUR ANSWER : ?

The torque produced in induction type relay is

inversely proportional to the current

proportional to the current

inversely proportional to the square of the current

proportional to square of the current

TRUE ANSWER : ?
YOUR ANSWER : ?

Admittance relay is

None of these

impedance relay

directional relay

non-directional relay

TRUE ANSWER : ?
YOUR ANSWER : ?

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