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43.

Hydrogen is preferred as better coolant in comparison to C02 because former

A.	is lighter	B.	is inert
C.	has high specific heat	D.	is a good conductor

44.

Natural uranium is made up of

A.	99.282% U238, 0.712% U235, 0.006% U234	B.	99.282% U235, 0.712% U238, 0.06%' U234
C.	99.282% U234, 0.712% U238, 0.006% U235	D.	99.282% U235, 0.712% U234, 0.006% U238

45.

The risk of radioactive hazard is greatest in the turbine with following reactor

A.	pressurized water	B.	boiling water
C.	gas cooled	D.	liquid metal cooled

46.

Plutonium is produced

A.	as basic raw material	B.	by neutron irradiation of Uz
C.	by neutron irradiation of thorium	D.	artificially

47.

Electron-volt is the unit of

A.	atomic power	B.	energy
C.	voltage	D.	radio activity

48.

Pick up the wrong statement

A.	In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator.	B.	Slow or thermal neutrons have energy of the order or 0.025 eV
C.	Fast neutrons have energies above 1000 eV	D.	Fast reactor uses moderator

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