Multiple Choice
In a circuit breaker the basic problem is to
A) maintain the arc
B) extinguish the arc
C) transmit large power
D) emit the ionizing electrons
Correct Answer:
Verified
Correct Answer:
Verified
Q2: The time of closing the cycle, in
Q3: Overheating of relay contacts or contact born
Q4: Large internal faults are protected by<br>A)merz price
Q5: Interruption of large currents by relay requires<br>A)arc
Q6: Resistance grounding is used for voltage between<br>A)33kVto66kV<br>B)HkVto33kV<br>C)3.3kVandllkV<br>D)none
Q8: H.R.C. fuses provide best protection against<br>A)overload<br>B)reverse current<br>C)open-circuits<br>D)short-circuits
Q9: Shunt capacitance is neglected while considering<br>A)short transmission
Q10: Protective relays are devices that detect abnormal
Q11: Ungrounded neutral transmission system is not recommended
Q12: To protect most of the electrical equipment