The fuse rating is expressed in terms of_____________?
The fuse rating is expressed in terms of_____________?
A. current
B. voltage
C. VAR
D. kVA
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For which of the following ratings of the transformer differential protection is recommended ?
For which of the following ratings of the transformer differential protection is recommended ?A. above 30 kVA.
B. equal to and above 5 MVA
C. equal to and above 25 MVA
D. none of the aboveCircuit breakers usually operate under______________?
Circuit breakers usually operate under______________?A. transient state of short-circuit current
B. sub-transient state of short-circuit current
C. steady state of short-circuit current
D. after D.C. component has ceasedThe delay fuses are used for the protection of ___________?
The delay fuses are used for the protection of ___________?A. motors
B. power outlet circuits
C. fluorescent lamps
D. light circuitsCircuit breakers are essentially______________?
Circuit breakers are essentially______________?A. current carrying contacts called electrodes
B. arc extinguishers
C. circuits to break the system
D. transformers to isolate the two systems
E. any of the aboveA short-circuit is identified by_____________?
A short-circuit is identified by_____________?A. no current flow
B. heavy current flow
C. voltage drop
D. voltage riseA fuse in a motor circuit provides protection against__________?
A fuse in a motor circuit provides protection against__________?A. overload
B. short-circuit and overload
C. open circuit, short-circuit and overload
D. none of the above