CIRCUIT BREAKERS AND RELAYS - Practice Mode

1) Which type of load is protected by G? series MCB?

Ovens Geysers Air conditioners General lighting systems

Correct Answer: Air conditioners

2) Which type of relay is used in both A.C and D.C supply?

Reed relay Impulse relay Thermal relay Clapper-type armature relay

Correct Answer: Impulse relay

3) Which circuit breaker is used as a switch and protective device in the domestic wiring circuit?

Air circuit breaker Miniature circuit breaker Moulded case circuit breaker Earth Leakage circuit breaker

Correct Answer: Miniature circuit breaker

4) What is the purpose of trip coil used in circuit breakers?

Easy operation Remote operation Accurate operation Emergency operation

Correct Answer: Remote operation

5) What is the function of relay to the breaking operation of circuit breaker in control circuit?

Sensing the fault quantities Analysing the condition of breaker Controlling the Speed in case of fault Interpreting the fault situation to operate breaker

Correct Answer: Interpreting the fault situation to operate breaker

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