A. Concrete
B. Boron
C. 18/8 stainless steel
D. All A., B. and C.
Related Mcqs:
- Which of the following is a moderating material used in nuclear reactor ?
A. Graphite
B. Cadmium
C. Zircaloy (an alloy of zirconium and aluminium)
D. Stainless steel - Moderating material used in a thermal-reactor should be a ____________________?
A. Good absorber of neutrons
B. Solid substance
C. Poor absorber of neutrons
D. None of these - 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 - Which of the following is not used as a nuclear fuel cladding material ?
A. Zircaloy
B. Cadmium
C. Ceramics
D. Stainless steel - Which of the following is a non-fissile material ?
A. Plutonium-239
B. Uranium-235
C. Uranium-233
D. Thorium-232 - Which of the following is not, a fertile material ?
A. Th-232
B. U-238
C. U-233
D. None of these - Radioactive decay of a material involves a _____________ order reaction?
A. Third
B. Second
C. First
D. Zero - Thermal nuclear reactors using enriched uranium as fuel contains a maximum of ____________ percent fissile material i.e. U-235?
A. 1
B. 2
C. 3
D. 7 - The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be ______________ of its original weight?
A. 1/2
B. 1/4
C. 1/8
D. 1/16 - The critical mass of a fissionable material can be reduced by__________________?
A. Heating it
B. Cooling it
C. Surrounding it by neutron reflecting material
D. Surrounding it by neutron absorbing material
