A. burning
B. arcing
C. melting
D. none of the above
The fuse blows off by___________? Read More »
Switchgear and Protection A. no ageing effect
B. high speed of operation
C. high rupturing capacity
D. all of the above
H.R.C. fuse, as compared to a rewirable fuse, has_________________? Read More »
Switchgear and Protection 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
An isolator is installed_____________? Read More »
Switchgear and Protection A. 20 A
B. 50 A
C. 100 A
D. 200 A
Protection by fuses is generally not used beyond__________? Read More »
Switchgear and Protection A. low currents circuits
B. low voltages circuits
C. high voltages and large currents circuits
D. all circuits
Oil switches are employed for_____________? Read More »
Switchgear and Protection A. overload
B. short-circuit and overload
C. open circuit, short-circuit and overload
D. none of the above
A fuse in a motor circuit provides protection against__________? Read More »
Switchgear and Protection A. Photoelectric effect
B. Electrostatic effect
C. Heating effect
D. Magnetic effect
On which of the following effects of electric current a fuse operates ? Read More »
Switchgear and Protection A. current
B. voltage
C. VAR
D. kVA
The fuse rating is expressed in terms of_____________? Read More »
Switchgear and Protection A. transmission line
B. motor
C. generator
D. feeder
The power loss is an important factor for the design of_______________? Read More »
Switchgear and Protection A. low melting point and high specific resistance
B. low melting point and -low specific resistance
C. high melting point and low specific resistance
D. low melting point and any specific resistance
The material used for fuse must have_____________? Read More »
Switchgear and Protection