SWITCH GEAR QUIZ

To protect most of the electrical equipment handling low power, the types of relays used are

Electronic and bimetallic

Thermocouple

Both of the listed here

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

When a fault occur in a power system, the circuit breaker

is opened manually

None of these

opens automatically

is opened by remote control

TRUE ANSWER : ?
YOUR ANSWER : ?

With which of the following, a circuit breaker must be equipped for remote operation ?

shunt trip

None of these

inverse time trip

time-delay trip

TRUE ANSWER : ?
YOUR ANSWER : ?

Back up protection is generally used for protection against

open-circuit faults only

short-circuit faults only

both open and short-circuit faults

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

If the fault occurs near the impedance relay, the V/ I ratio will be

constant for all distances

Lower than that of if fault occurs away from the relay

None of these

higher than that of if fault occurs away from the relay

TRUE ANSWER : ?
YOUR ANSWER : ?

The fuse rating is expressed in terms of

kVA

VAR

voltage

current

TRUE ANSWER : ?
YOUR ANSWER : ?

A fuse in a motor circuit provides protection against

open circuit, short-circuit and overload

short-circuit and overload

overload

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

In a single bus-bar system there will be complete shut down when

fault occurs on neutral line

two or more faults occur simultaneously

fault occurs on the bus itself

fault occurs with respect to earthing

TRUE ANSWER : ?
YOUR ANSWER : ?

Series capacitors are used to

improve line voltage

compensate for line inductive reactance

compensate for line capacitive reactance

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A differential relay measures the vector difference between

two currents

two or more similar electrical quantities

two voltages

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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