581.
The main interest of shielding in nuclear reactor is protection against
A
X-rays
B
infra-red rays
C
a, P, and y rays
D
neutrons and gamma rays
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The main interest of shielding in nuclear reactor is protection against
X-rays
infra-red rays
a, P, and y rays
neutrons and gamma rays
The function of control rods in nuclear plants is to
control temperature
control readioactive pollution
control absorption of neutron
control fuel consumption
The first nunclear power plant in India is located at
Kota
Kalapakkam
Tarapur
Baraeilly
The energy required to be applied to a radioactive nucleus for the emission of a neutron is
1 MeV
2.4 MeV
4.3 MeV
7.8 MeV
The energy produced by a thermal reactor of same size as a breeder reactor is
almost same
slightly more
slightly less
much less
The efficiency of a nuclear power plant in comparsion to a conventional thermal power plant is
same
more
less
may be less or mote depending on size
The coolant used in boiling water reactor is
Co2
pressurised water
mixture of water and steam
liquid metal
The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is
same
lower
higher
unity
Reflector in nuclear plants is used to
return the neutrons back into the core
shield the radioactivity completely
check polllution
conserve energy
Reactors for propulsion applications use
natural uranium
molten lead
any form of uranium
thorium
Plutonium is produced
as basic raw material
by neutron irradiation of Uz
by neutron irradiation of throium
artificially
One gram of uranium will produce energy equivalent to approximately
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
Moderator in nuclear plants is used to
moderate the radioactive pollution
extract heat from nuclear reaction
control the reaction
cause collision with the fast moving neutrons to reduce their speed
In nuclear fission each neutron that causes fission releases
no new neutron
at least one new neutron
one new neutron
more than one new neutrons
In boiling water reactor, moderator is
coolant itself
ferrite rod
graphite rod
liquid sodium metal
Hydrogen is preferred as better coolant in comparison to C02 because former
is lighter
is inert
has high specific heat
is a good conductor
Gas cooled reactor uses following materials as moderator, and coolant
graphite,
graphite, air
heavy water,
lead,
For economical operation of a nuclear plant
used fuel should be reprocessed
moderator should be used
coolant should be employed
control rods should be used
Fast breeder reactor uses
boiler
direct cycle of coolant system
double circuit system of coolant cycle
multi pass system
Breeder reactor has a conversion ratio of
unity
more than unity
less than unity
zero