Biological shield in a nuclear power reactor is made of________________?

A. 0.3
B. 0.5
C. 0.8
D. 2.5

A. Cast iron
B. Refractory blocks
C. Stainless steel
D. Lead lined steel

A. Dilute HCl
B. Acetic acid
C. Concentrated H2SO4
D. None of these

A. Nichrome
B. Tungsten
C. Constantan
D. German silver

A. Non-ferrous metals
B. Low carbon steel
C. Stainless steel
D. Cast iron

A. Calorising
B. Pack carburising
C. Nitriding
D. Cyaniding