A moderator _____________ the neutrons?
A moderator _____________ the neutrons?
A. Slows down
B. Absorbs
C. Accelerates
D. Reflects
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Uranium is recovered from its ore (pitchblende) by________________?
Uranium is recovered from its ore (pitchblende) by________________?A. Froth floatation technique
B. Leaching with sulphuric acid
C. Smelting in a furnace
D. Dissolving in waterHow many atoms are present in one gm-atom of an element ?
How many atoms are present in one gm-atom of an element ?A. 2 × 1023
B. 6 × 1023
C. 6 × 1032
D. 5 × 105In a homogeneous nuclear reactor, the _____________ are mixed together?
In a homogeneous nuclear reactor, the _____________ are mixed together?A. Fuel & coolant
B. Fuel & moderator
C. Coolant & moderator
D. None of theseThe main purpose of control rod in a nuclear reactor is to control the___________________?
The main purpose of control rod in a nuclear reactor is to control the___________________?A. Chain reaction and hence the power output by regulating the number of secondary neutrons
causing fission
B. Emission of hazardous radiation
C. Conversion of fissile material into fertile material
D. Velocity of the secondary neutronsArtificially produced radioactive isotopes are used for____________________?
Artificially produced radioactive isotopes are used for____________________?A. Power generation
B. Treatment of certain diseases
C. Initiating nuclear fission and fusion
D. All A., B. and C.A thermal nuclear reactor compared to a fast breeder reactor ?
A thermal nuclear reactor compared to a fast breeder reactor ?A. Uses slower neutrons for fission
B. Uses faster neutrons for fission
C. Gives higher power density
D. Requires less fuel to run at the same power level