40 TOP NUCLEAR POWER Engineering Online Test – Multiple Choice Questions and Answers 1. Enrichment of uranium is done to increase the concentration of __________ in the natural uranium Pu-239 U-233 U-238 U-235 2. 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 3/4th of it will disintegrate in two months it will completely disintegrate in four months l/8th of it will remain intact at the end of four months it will completely disintegrate in two months 3. Uranium ore is currently mined & concentrated at Jadugoda Alwaye Khetri Ghatsila 4. Main source of __________ is monazite sand uranium hafnium thorium polonium 5. Percentage of U-238 in natural uranium is around 0.015 0.71 29.71 99.29 6. A fast breeder reactor employs molten sodium as coolant as well as moderator water as coolant graphite as moderator U-235 as fuel 7. Which one is radioactive in nature ? Helium Tritium Deuterium Heavy hydrogen 8. Graphite is used in nuclear reactor as insulation lining of the reactor retarder of neutron velocity fuel lubricant 9. Fuel for a nuclear reactor (thermal) is plutonium radium uranium none of these 10. The most commonly used nuclear fuel in boiling water reactor is natural uranium enriched uranium monazite sand plutonium Loading … Question 1 of 10
