Gas cooling as compared to water cooling of nuclear reactors

A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are

A

Equal in size

B

Of different sizes

C

Of such size that the ratio of their volumes is

D

None of these

Which is the most commonly used molten metal for cooling of nuclear reactors?

A

Zinc

B

Sulphur

C

Sodium

D

Manganese

Heavy water used in the nuclear reactors to slow down the speed of neutrons is

A

Highly purified water

B

A compound of oxygen and deuterium

C

Water having dissolved salts of heavy metals

D

None of these

Ceramic nuclear metals compared to solid nuclear metals have

A

higher melting points

B

low strength at high temperature

C

more chances of radiation damage

D

poorer corrosion resistance

Which of the following types of nuclear reactors is most prone to radioactive hazards?

A

Gas cooled reactor

B

Molten Sodium Reactor

C

Boiling water reactor

D

Pressurised water reactor

Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher

A

Melting point, hence can be subjected to higher temperature

B

Density ; hence core volume for a given power output would be smaller

C

Resistance to effects of irradiation

D

All of the above

The control rods in the control system of nuclear reactors are used to

A

Absorb excess neutrons

B

Control fuel consumption

C

Control temperature

D

All of these

Nuclear reactors are used

A

To produce heat for thermoelectric power

B

To produce fissionable material

C

To propel ships, submarines, aircrafts

D

All of these

Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of

A

High carbon steel

B

Molybdenum

C

Zircalloy

D

Boron or cadmium

Nuclear Reactors are based on which of the following phenomenon?

A

Magnetic confinement of Plasma

B

Nuclear Fusion

C

Controlled Nuclear Fission

D

None of the above

Gas cooling as compared to water cooling of nuclear reactors

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