A. Good absorber of neutrons
B. Solid substance
C. Poor absorber of neutrons
D. None of these
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 - 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. - 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 - Which of the following is a fuel for a fusion reactor (thermonuclear reactor) ?
A. Deuterium and tritium
B. U-233
C. Thorium
D. Heavy water - Candu reactor is a ______________ nuclear reactor?
A. Natural uranium fuelled heavy water cooled & moderated
B. Highly enriched uranium (85% U-235) fuelled
C. Homogeneous
D. Fast breeder - Fuel for a nuclear reactor (thermal) is___________________?
A. Uranium
B. Plutonium
C. Radium
D. None of these - Spent fuel from the nuclear thermal reactor contains__________________?
A. Fission products
B. Plutonium
C. Unused fuel
D. All A., B. & C. - Heat is generated in a nuclear reactor (thermal) by_________________?
A. Combustion of a nuclear fuel e.g. uranium
B. Fusion of atoms of uranium
C. Absorption of neutrons in uranium atoms
D. Fission of U-235 by neutrons - Pressure in a Pressurised Water Reactor (PWR) is used for ____________________?
A. Maintaining constant pressure in the primary cooling circuit under varying loads
B. Superheating the steam
C. Pressurising the water in the primary coolant circuit
D. None of these - 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
