A. mass number
B. atomic number
C. chemical properties
D. position in periodic table
E. all of the above
A. lead or concrete
B. lead and tin
C. graphite or cadmium
D. thick galvanised sheets
E. black carbon papers
A. return the neutrons back into the core
B. shield the radioactivity completely
C. check polllution
D. conserve energy
E. is not used
A. operate at extremely high power densities.
B. are liquid-metal cooled
C. produce more fuel than they consume
D. are unmoderated
E. use water as coolant
A. same
B. lower
C. higher
D. unity
E. higher/lower depending on the size of reactor
A. maximum in center and zero at side
B. maximum at side and zero in center
C. uniform throughout
D. zero throughout
E. none of the above
A. acts as good moderator
B. produces maximum steam
C. transfers heat from core at a fast rate
D. breeds neutrons
E. increases rate of reaction in core