Fundamentals of Switchgear -MCQs with answersQ1. What is switchgear?
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.View Answer / Hide AnswerQ2 .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.View Answer / Hide Answer
Q3. When does the circuit breaker operate in the line?
ANSWER: d. Prevent excess current from flowing into 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.View Answer / Hide Answer
Q4. Which device sends the information to the circuit breaker to interrupt the circuit in case of fault?
ANSWER: Whenever the fault occurs in the line
c. Circuit breaker itself does this function.
d. Fuse.View Answer / Hide AnswerQ5. Which material is used for the manufacture of bus bars?
a. Aluminium rods.
b. Copper rods.
c. Any conducting material.
d. Made of silver.View Answer / Hide AnswerQ6 How is the bus bars rated?
a. Current only.
b. Voltage only.
c. Current, voltage and frequency.
d. Current, voltage, frequency and short circuit current.View Answer / Hide Answer
ANSWER: d. Current, voltage, frequency and short circuit current.