Which device sends the information to the circuit breaker to interrupt the circuit in case of fault?
A. Switch
B. Relay
C. Circuit breaker itself does this function.
D. Fuse
A. An apparatus used for switching, controlling and protecting the electrical circuits and equipments.
B. It detects the faults only.
C. It corrects the faults only.
D. All of the above.
What is the primary principle of a fuse?
A. Open the circuit.
B. Protect the appliance.
C. Protect the line.
D. Prevent excess current from flowing into the line.
When does the circuit breaker operate in the line?
A. When power is to be supplied.
B. When the line is to be tested.
C. Whenever the fault occurs in the line.
D. Whenever the switch and the relay has to be operated.
Which material is used for the manufacture of bus bars?
A. Aluminium rods.
B. Copper rods.
C. Any conducting material.
D. Made of silver.
A. Current only.
B. Voltage only.
C. Current, voltage and frequency.
D. Current, voltage, frequency and short circuit current.