Category: Materials and Construction

A. Calcium
B. Silicon
C. Boron
D. Aluminium

A. 16-13% Cr 10-14% Ni and 2-3% Mo
B. 20-22% Cr, and 8-10% Ni
C. 2-4% Cr, 22% NI and 2-4% Mo
D. None of these

A. Have lower corrosion resistance
B. Are harder to fabricate
C. Are less ductile and hence less suitable for cold pressing
D. All A., B. and C.

A. Silver
B. Copper
C. Zinc
D. Nickel

A. Pure rubber is as useless as pure gold as a material of construction
B. Thermal conductivity of aluminium is higher than that of copper; hence it is increasingly used for utensil making
C. Copper has poor weldability
D. Reinforced plastics are made from both thermoplastic as well as thermosetting plastics

A. Low carbon steel
B. Mild steel
C. Wrought iron
D. White cast iron

A. Plain carbon steel
B. Chrome carbon steel
C. Stainless steel
D. Malleable cast iron

A. 500
B. 750
C. 900
D. 1100

A. Bromine
B. Dry chlorine & dry fluorine
C. Nitric acid (95% and fuming)
D. Phosphoric acid (95%) & sulphuric acid (95% and fuming)

A. Cast iron vessels
B. Steel cylinders
C. Aluminium containers
D. Monel drums