181. Fast breeder Test Reactor (FBTR) is located at Kalpakkam (near Madras). Kota (in Rajasthan). BARC (Trombay). Tarapur (in Maharashtra). ✅ The correct answer is option A.
182. Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage. fuel elements operating personnels walls of the reactor none of these ✅ The correct answer is option B.
183. Energy produced in the nuclear fission is of the order of __________ MeV. 20 200 1000 2000 ✅ The correct answer is option B.
184. Thorium metal resembles steel in appearance. is less hard (in the range of silver). is highly ductile. all (a), (b) and (c). ✅ The correct answer is option D.
185. Quantity of fissionable material (i.e. U-235) in natural uranium is __________ percent. 0.71 6.31 99.29 12.73 ✅ The correct answer is option A.
186. In a homogeneous nuclear reactor, the __________ are mixed together. fuel & coolant fuel & moderator coolant & moderator none of these ✅ The correct answer is option B.
187. Isotopes of an element have different mass number electronic configuration nuclear charge chemical properties ✅ The correct answer is option A.
188. Water is a better coolant than a gas (like CO2, He, N2 etc.), because it is a better neutron moderator as well. requires comparatively smaller pumps and heat exchanger for a given heat transfer rate. has a better heat transfer characteristics, and it can be pressurised to attain a high temperature. all (a), (b) and (c). ✅ The correct answer is option D.
189. Research reactors are normally meant for producing high neutron flux 1012-1013 neutrons/cm2, sec and studying the effect of neutron bombardment on dif ferent materials. accelerating the neutrons. power generation. none of these ✅ The correct answer is option A.
190. A boiling water reactor is the one, in which the coolant water is allowed to boil in the core of the reactor. coolant water, after being heated in the reactor core, generates steam in a boiler. pressurised water is pumped into the core. fuel and the coolant are thoroughly mixed to form a homogeneous solution. ✅ The correct answer is option A.