| 1. | An arc in a circuit behaves like ? | |
|
infinite resistance
|
||
|
a capacitive reactance
|
||
|
a resistance decreasing with voltage rise across the arc
|
||
|
an inductive reactance
|
||
View Answer
Discuss in Forum
Report Question| 2. | Merz-Price protection is used for ? | |
|
air cooled transformers
|
||
|
alternators
|
||
|
long transmission lines
|
||
|
short transmission lines
|
||
| 3. | Which system will need the lightning arrester of least voltage rating ? | |
|
Reactance grounded neutral system
|
||
|
Resistance grounded neutral system
|
||
|
Solid ground neutral system
|
||
|
Insulated neutral system
|
||
| 4. | The material used for bus bars should have ? | |
|
low resistivity
|
||
|
low cost
|
||
|
higher softening temperature
|
||
|
all of the above
|
||
| 5. | Which portion of transmission system is least prone to faults ? | |
|
Alternators
|
||
|
Overhead lines
|
||
|
Switchgear
|
||
|
None of the above
|
||
| 6. | In a contacter, interrupting medium maybe ? | |
|
SFs gas
|
||
|
air
|
||
|
oil
|
||
|
any of the above
|
||
| 7. | A .......... is used to measure the stator .. winding temperature of the generator ? | |
|
thermometer
|
||
|
thermocouple
|
||
|
pyrometer
|
||
|
Resistance thermometer
|
||
| 8. | A transmission line is protected by ? | |
|
inrush protection
|
||
|
distance protection
|
||
|
time graded and current graded over current protection
|
||
|
both (b) and (c)
|
||
| 9. | Magnetic circuit breaker has ...... trip action ? | |
|
delayed
|
||
|
none of the mention
|
||
|
instantaneous
|
||
|
both of the above
|
||
| 10. | Large internal faults are protected by ? | |
|
earth fault and positive sequence relays
|
||
|
mho and ohm relays
|
||
|
merz price percentage differential protection
|
||
|
horn gaps and temperature relays
|
||