| 1. | Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is ? | |
|
heavy water
|
||
|
graphite
|
||
|
carbon dioxide
|
||
|
no moderator is needed
|
||
View Answer
Discuss in Forum
Report Question| 2. | The brake power is the power available ? | |
|
in the engine cylinder
|
||
|
at the crank shaft
|
||
|
at the crank pin
|
||
|
none of these
|
||
| 3. | The control rods in the control system of nuclear reactors are used to ? | |
|
absorb excess neutrons
|
||
|
control fuel consumption
|
||
|
control temperature
|
||
|
all of these
|
||
| 4. | The combustion in compression ignition engines is ? | |
|
homogeneous
|
||
|
hetrogeneous
|
||
|
both (a) and (b)
|
||
|
none of these
|
||
| 5. | The loud pulsating noise heard within the cylinder of an internal combustion engine is known as ? | |
|
detonation
|
||
|
turbulence
|
||
|
pre-ignition
|
||
|
supercharging
|
||
| 6. | The thermal efficiency of diesel engines is about ? | |
|
15%
|
||
|
30%
|
||
|
50%
|
||
|
70%
|
||
| 7. | A higher compression ratio causes ? | |
|
pre-ignition
|
||
|
increase in detonation
|
||
|
an acceleration in the rate of combustion
|
||
|
any one of these
|
||
| 8. | Reactors for propulsion applications are designed for ? | |
|
any form of uranium
|
||
|
natural uranium
|
||
|
enriched uranium
|
||
|
plutonium
|
||
| 9. | The cetane number of diesel oil, generally available, is ? | |
|
20 to 25
|
||
|
25 to 30
|
||
|
30 to 40
|
||
|
40 to 55
|
||
| 10. | The pressure at the end of compression, in petrol engines, is approximately ? | |
|
10 bar
|
||
|
20 bar
|
||
|
25 bar
|
||
|
35 bar
|
||