Question 1 : Which of the following may not need a moderator?
1. Candu Reactor
2. Fast Breeder Reactor
3. Homogeneous Reactor
4. none of the mentioned
View Answer   Discuss with Members

Question 2 : Thermal neutrons which are used to cause the fission of U-235 have energy __________ eV.
1. >1
2. <0.025
3. >200
4. 1-25
View Answer   Discuss with Members

Question 3 : A moderator ______ the neutrons
1. accelerates
2. slows down
3. blocks
4. stops
View Answer   Discuss with Members

Question 4 : Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of __________ percent of U-235 (i.e. fissile material).
1. 15
2. 45
3. 65
4. 85
View Answer   Discuss with Members

Question 5 : The nuclear activity occurring in the radioisotope Krypton 87 is?
1. Alpha emission
2. Gamma Emission
3. Beta emission
4. None of the mentioned
View Answer   Discuss with Members

Question 6 : The immediate products of fission are called?
1. fission splits
2. fission fragments
3. fission products
4. fission scatters
View Answer   Discuss with Members

Question 7 : The velocity of a fast moving neutron is?
1. 2 m/s
2. 2.4 x 10¹⁰ m/s
3. 4.4 x 10¹⁰ m/s
4. 4.4 x 10⁶ m/s
View Answer   Discuss with Members

Question 8 : The amount of a radioisotope remaining un-decayed after a time equal to four times its half-life will be __________ percent.
1. 3.125
2. 6.25
3. 12.50
4. 25
View Answer   Discuss with Members

Question 9 : The half-life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half-life period of a radioactive substance is one month, then
1. it will completely disintegrate in two months
2. l/8th of it will remain intact at the end of four months
3. 3/4th of it will disintegrate in two months
4. it will completely disintegrate in four months
View Answer   Discuss with Members

Question 10 : Nuclear fuel complex, Hyderabad is engaged in the job of
1. processing of uranium ore
2. manufacture of nuclear fuel elements/assemblies
3. treatment of spent fuel
4. none of the mentioned
View Answer   Discuss with Members