| 1. | Over fluxing protection is recommended for ? | |
|
distribution transformer
|
||
|
generator transformer of the power plant
|
||
|
auto-transformer of the power plant
|
||
|
station transformer of the power plant
|
||
View Answer
Discuss in Forum
Report Question| 2. | The under voltage relay can be used for ? | |
|
generators
|
||
|
busbars
|
||
|
motors
|
||
|
all of the above
|
||
| 3. | The fuse rating is expressed in terms of ? | |
|
current
|
||
|
voltage
|
||
|
VAR
|
||
|
kVA
|
||
| 4. | Minimum arcing voltage will be least in case of ? | |
|
silver
|
||
|
graphite
|
||
|
carbon
|
||
|
tungsten
|
||
| 5. | Air used in air blast circuit breaker ? | |
|
must be free from moisture
|
||
|
must have least CO2
|
||
|
must be ionized
|
||
|
must have oil mist
|
||
| 6. | The rating of a circuit breaker is generally determined on the basis of ? | |
|
line -to-line fault current
|
||
|
symmetrical fault current
|
||
|
single line to ground fault current
|
||
|
double line to ground fault current
|
||
| 7. | Current limiting reactors may be ? | |
|
air cooled air cored
|
||
|
oil immersed magnetically shielded
|
||
|
oil immersed non-magnetically shielded
|
||
|
any of the above
|
||
| 8. | H.R.C. fuses provide best protection against ? | |
|
short-circuits
|
||
|
overload
|
||
|
reverse current
|
||
|
open-circuits
|
||
| 9. | For the protection of power station buildings against direct strokes the requirements are ? | |
|
interception, conduction, dissipation and reflection
|
||
|
interception and conduction
|
||
|
interception
|
||
|
interception, conduction and dissipation
|
||
| 10. | For cost and safety, the outdoor substations are installed for voltages above ? | |
|
60 kV
|
||
|
110 kV
|
||
|
33 kV
|
||
|
11 kV
|
||