A. burning
B. arcing
C. melting
D. none of the above
0
H.R.C. fuse, as compared to a rewirable fuse, has_________________?
0
An isolator is installed_____________?
A. no ageing effect
B. high speed of operation
C. high rupturing capacity
D. all of the above
0
Protection by fuses is generally not used beyond__________?
A. to operate the relay of circuit breaker
B. as a substitute for circuit breaker
C. always independent of the position of circuit breaker
D. generally on both sides of a circuit breaker
0
Oil switches are employed for_____________?
A. 20 A
B. 50 A
C. 100 A
D. 200 A
0
A fuse in a motor circuit provides protection against__________?
A. low currents circuits
B. low voltages circuits
C. high voltages and large currents circuits
D. all circuits
0
On which of the following effects of electric current a fuse operates ?
A. overload
B. short-circuit and overload
C. open circuit, short-circuit and overload
D. none of the above
0
The fuse rating is expressed in terms of_____________?
A. Photoelectric effect
B. Electrostatic effect
C. Heating effect
D. Magnetic effect
0
The power loss is an important factor for the design of_______________?
A. current
B. voltage
C. VAR
D. kVA