A. 159
B. 1837
C. 2537
D. 10000
Related Mcqs:
- An electron has a mass that is approximately ____________ that of the proton?
A. 1836 (approximately)
B. 1/1836 (approximately)
C. 1
D. ∞ - Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is_______________?
A. 3
B. 235
C. 200
D. 92 - In β-decay of radioactive material, the ratio of neutron to proton____________________?
A. Increases
B. Remain same
C. Decreases
D. Is unpredictable; may increase or decrease - The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235, followed by nuclear fission is __________________?
A. 1
B. 2
C. 3
D. 4 - Primary purpose of a ____________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014neutrons/cm2 second?
A. Research
B. Power
C. Breeder
D. Homogeneous - 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 - Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around _____________ m/sec?
A. 1
B. 2200
C. 3 × 1011
D. 9 × 1021 - Which of the following reactors is operated at high neutron flux and low power level ?
A. Breeder reactor
B. Research reactor
C. Heterogeneous reactor
D. Liquid metal (e.g., molten sodium) cooled reactor - Critical energy should be _______________ the neutron binding energy of the atom in order to initiate a nuclear fission?
A. Equal to
B. Less than
C. More than
D. Either more or less - “Critical mass” is the minimum mass of nuclear fissile material required for the__________________?
A. Sustainment of chain reaction
B. Power generation on commercial scale
C. Economic power generation
D. None of these
