1.  lead or concrete

2.  lead and tin

3.  graphite or cadmium

4.  thick galvanized sheets

4
Correct Answer :

lead or concrete


Explanation :
No Explanation available for this question

1.  X-rays

2.  infra-red rays

3.  a, P, and y rays

4.  neutrons and gamma rays

4
Correct Answer :

neutrons and gamma rays


Explanation :
No Explanation available for this question

1.  return the neutrons back into the core

2.  shield the radioactivity completely

3.  check pollution

4.  conserve energy

4
Correct Answer :

return the neutrons back into the core


Explanation :
No Explanation available for this question

1.  1 MeV

2.  2.4 MeV

3.  4.3 MeV

4.  7.8 MeV

4
Correct Answer :

7.8 MeV


Explanation :
No Explanation available for this question

1.  U233 and Pu239

2.  U238 and Pu239

3.  U238 and Th239

4.  none of the above

4
Correct Answer :

U238 and Pu239


Explanation :
No Explanation available for this question

1.  the most fissionable material

2.  the basic fuel for nuclear paints

3.  basic raw material for nuclear plants

4.  the material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material

4
Correct Answer :

the material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material


Explanation :
No Explanation available for this question

1.  % of U235 has been artificially in-creased

2.  % of U has been artificially increased

3.  % of U234 has been artificially increased

4.  extra energy is pumped from outside

4
Correct Answer :

\% of U235 has been artificially in-creased


Explanation :
No Explanation available for this question

1.  nucleus

2.  electron

3.  proton

4.  meson

4
Correct Answer :

electron


Explanation :
No Explanation available for this question

1.  neutron

2.  proton

3.  atom

4.  electron

4
Correct Answer :

atom


Explanation :
No Explanation available for this question

1.  any type of moderator can be used

2.  graphite is used as the moderator

3.  heavy water is used as the moderator

4.  moderator is dispensed with.

4
Correct Answer :

moderator is dispensed with.


Explanation :
No Explanation available for this question

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