1) Which of the following factors is the most important in the site selection for a nuclear power plant ? a. Absence of earthquake prone zone in nearby areas b. Abundant availability of water c. Remotely located from residential areas d. Proximity to fuel source
|
||||
2) Graphite is used in nuclear reactor as_____________________? a. Insulation lining of the reactor b. Fuel c. Lubricant d. Retarder of neutron velocity
|
||||
3) Which of the following may not need a moderator ? a. Candu reactor b. Fast breeder reactor c. Homogeneous reactor d. Pressurised water reactor
|
||||
4) Net efficiency of ordinary light water cooled nuclear reactor is about _____________ percent? a. 32 b. 52 c. 72 d. 88
|
||||
5) Thermal neutrons which are used to cause the fission of U-235 have energy _____________ eV? a. < 0.025 b. > 1 c. 1-25 d. > 200
|
||||
6) In nuclear reactions, ______________ number is conserved? a. Mass b. Atomic c. Both A. & B. d. Neither A. nor B.
|
||||
7) Which of the following ores contains maximum percentage of uranium ? a. Carnotite b. Thorium c. Rescolite d. Pitchblende
|
||||
8) Plutonium________________? a. Is recovered from spent fuel from thermal nuclear reactor b. Has much lower melting point (640°C ) compared to thorium (1690°C) c. Both A. and B. d. Neither A. nor B.
|
||||
9) Tarapur (INDIA) atomic power station____________________? a. Has two boiling water reactors of American design b. Has an installed capacity of 400 MW c. Is the first power reactor in India, which became critical in 1969 d. All A., B. and C.
|
||||
10) Thorium-232 (a fertile material) on absorption of a neutron gets converted into ___________ , which is a fissile material? a. Thorium-233 b. Uranium-235 c. Uranium-233 d. Plutonium-239
|
||||
11) Final product of uranium extraction plant at Jadugoda (Bihar) is________________? a. Uranium b. Uranium oxide c. Uranium carbide d. Magnesium diuranate
|
||||
12) β-rays emission in radioactive disintegration is always accompanied by the emission of____________________? a. γ-rays b. α-rays c. Neutrons d. None of these
|
||||
13) Which is used as a coolant in nuclear reactor due to its high capture cross-section ? a. H2 b. N2 c. He d. CO2
|
||||
14) The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the________________? a. Fuel cost per unit power generated is less b. Thermal efficiency of the former is higher c. Maintenance cost of the former is less d. None of these
|
||||
15) Which of the following is not a good moderating material ? a. Concrete b. Boron c. 18/8 stainless steel d. All A., B. and C.
|
||||
16) Percentage of U-238 in natural uranium is around__________________? a. 0.71 b. 99.29 c. 0.015 d. 29.71
|
||||
17) Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of___________________? a. High carbon steel b. Molybdenum c. Zircaloy d. Boron or cadmium
|
||||
18) Which of the following is not a naturally occurring nuclear fuel ? a. Uranium-238 b. Thorium-233 c. Plutonium-239 d. None of these
|
||||
19) Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor ? a. Molten sodium cooled b. CO2 gas cooled c. Pressurised water d. Boiling water
|
||||
20) Emission of β-particles during radioactive decay of a substance is from__________________? a. Innermost shell b. Nucleus c. Outermost shell d. None of these
|