Most of the common metals have ______________ crystal structure?

A. Cubic
B. Hexagonal
C. Orthorhombic
D. None of these

Hastelloy C is a good material of construction in chemical process industry, since it is ___________________?

A. Highly corrosion resistant and is readily fabricated
B. Relatively inexpensive although it can be fabricated with some difficulty
C. Corrosion resistant to most alkalis, particularly because of its copper content
D. Light and resists attack by acids

Bell metal is an alloy of __________________?

A. Copper & zinc
B. Copper & tin
C. Copper & nickel
D. Zinc & tin

The specific gravity of coal depends mainly on its ______________ content?

A. Carbon
B. Volatile matter
C. Ash
D. Moisture

Bog iron used for the adsorption of H2S from coke oven gas is___________________?

A. An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
B. Iron impregnated with resin (usually Bakelite)
C. Carbon free iron
D. None of these

To improve the machinability of steel by its softening, it is subjected to __________________?

A. Cold working
B. Annealing
C. Shot blasting
D. Heating

With increase in the carbon percentage in the steel, its__________________?

A. Hardness increases
B. Ductility reduces
C. Tensile strength increases
D. All A., B. and C.

Bearings subjected to light load are made of________________?

A. White metal
B. Phosphorous bronze
C. Monel
D. Silicon bronze

Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its__________________?

A. Corrosion resistance
B. Tensile strength
C. Machinability
D. Compressive strength

In SO3 absorber (Contact Process), packing material used is of________________?

A. Cast iron
B. Chemical stoneware
C. Karbate
D. Mild steel