Materials and Construction

A. Solder
B. White metal
C. Pewter metal
D. Bronzes

A. Makes it brittle
B. Increases its strength
C. Increases its hardness
D. Is desirable

A. Solid solution hardening
B. Screw dislocation
C. Strain ageing
D. Twinning

A. Silica
B. Fireclay
C. Silicon carbide
D. Corundum

A. High silicon iron, silicon rubber, Kel-F and Teflon
B. Mild steel and stainless steel
C. Cast iron, tin and aluminium
D. Copper, nickel and Monel

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

A. Is used as an alloying element for both ferrous & non-ferrous alloys
B. Is paramagnetic below 415° C (its Curie temperature)
C. Diamagnetic
D. Has a body centred cubic (bcc) crystal lattice structure

A. Price
B. Corrosion resistance
C. Thermal conductivity
D. Abundant availability

A. Fluorine (dry or wet)
B. Sulphuric acid
C. Phosphoric acid
D. None of these

A. Zinc
B. Tin
C. Copper
D. Molybdenum