BEE ELECTRICAL UNIT 3 MCQ TEST

Earth resistance is dependent on

• depth of earth electrode in earth

• size of earth electrode and earth wire

• temperature of soil surrounding the earth electrode

• All of the above

Fuse is a device ___

• which can break the circuit under healthy conditions

• which can only break the circuit under faulty conditions

In case of HRC fuse, current carrying element is surrounded by ______ to quench the arc

• Quartz powder

• SF6 gas

The combination of fuse and switch is called as

• ..SFU

• ..FSU

• Both of the above

The automatic operation of ______ can be obtained in four different ways: magnetic and thermal

• ..MCB

• ..ELCB

The capacity of MCB is ______ that of MCCB

• Equal to

• Less than

Full name of MCB is___

• Minimum circuit breaker

• .. Miniature circuit breaker

In SFU, the fuses are___

• Moving

• Stationery

The automatic operation of ______ can be obtained in four different ways: magnetic and thermal

• MCB

• ELCB

It is not necessary to arrange a ______ after MCB

• ELCB

• Fuse