Gas cooled
Liquid metal cooled
Pressurised water
Boiling water
D. Boiling water
Increased production of neutrons
Complete absorption of neutrons
Controlled production of neutrons
Decreased leakage of neutrons
No new neutron
At least one new neutron
One new neutron
More than one new neutron
Electrons
α, β and γ rays
Neutron and gamma rays
None of these
90% U₂₃₅
U₂₃₈
U₂₃₅
Pu₂₃₉
Artificially
When U238 is irradiated by neutrons
By fission of Th232
As basic raw material
By increasing the contents of U₂₃₅
By slowing down fast neutrons so that U₂₃₅ fission continues by slow neutron
Both (A) and (B)
None of these
The original elements change into completely different elements
The electrons of the element change
The molecules rearrange themselves to form other molecules
None of the above
5 MeV
10 MeV
199 MeV
168 MeV
Light or heavy water
Molten lead
Carbon dioxide
Freon
Natural uranium
Enriched uranium
Pure uranium
Any type of uranium
1 tonne of high grade coal
4.5 tonnes of high grade coal
10 tonnes of high grade coal
100 tonnes of high grade coal
Increases
Decreases
Have no effect on
None of these
Boiler
Direct cycle of coolant system
Double circuit system of coolant cycle
Multi passes system
Absorbs neutrons
Does not absorb neutrons
Accelerates neutrons
None of these
Light weight atoms
Heavy weight atoms
Critical atoms
Zero weight atoms
As basic raw material
By neutron irradiation of Uz
By neutron irradiation of thorium
Artificially
It produces more fuel than it consumes.
It requires highly enriched fuel.
It requires liquid sodium metal as moderator.
All of the above
Centrifugal
Axial
Reciprocation
Electromagnetic
To maintain constant pressure in primary circuit under varying load
To Supply high pressure steam
To increase pressure of water in primary circuit
To provide sub cooled water at high pressure
Chain reaction can be initiated
It becomes uncontrollable
It explodes
It produces no power
Electron volt
Electron ampere
Curie
MV
Steam power plant
Gas turbine power plant
Hydro electric power plant
Nuclear power plant
1 MeV
2.4 MeV
4.3 MeV
7.8 MeV
Does not absorb neutrons
Absorbs neutrons
Accelerates neutrons
Eats up neutrons
U₂₃₃ and Pu₂₂₉
U₂₃₁ and Pu₂₃₃
U₂₃₅ and Pu₂₃₅
U₂₃₈ and Pu₂₃₉
In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator.
Slow or thermal neutrons have energy of the order or 0.025 eV
Fast neutrons have energies above 1000 eV
Fast reactor uses moderator
1-99 %
1-25 %
1-50 %
1-75 %
Slowing down fast neutrons so that Uz fission continues by slow motion neutrons
Accelerating fast neutrons
Absorbing all neutrons
Using moderator
2.46
24.6
246
2460
High energy (fast) neutrons alone
Low energy (slow) neutrons alone
Either fast or slow neutrons
Medium energy neutrons