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.Management Sciences
Category: Materials and Construction
Hardest materials so far found is_________________?
A. Diamond
B. Graphite
C. Carborundum
D. Pumice stone
Chromel (Nichrome) is an alloy of_____________________?
A. Chromium and molybdenum
B. Nickel and chromium
C. Molybdenum and nickel
D. Chromium and aluminium
Carbon is present in steel wholly in the__________________?
A. Combined form
B. Free state as graphite
C. Both A. and B.
D. Neither A. nor B.
Which of the following stainless steels is non-magnetic ?
A. Ferritic
B. Martenistic
C. Austenitic
D. None of these
Brine (15% concentration) can be stored in a vessel made of____________________?
A. Monel
B. Karbate
C. Cast iron
D. None of these
Manganese in steel affects its__________________?
A. Ductility
B. Tensile strength
C. Hardness
D. None of these
Which of the following is produced by condensation polymerisation ?
A. Bakelite
B. Polythene
C. Poly vinyl chloride
D. Polystyrene
White metal is an alloy of___________________?
A. Lead, tin and cadmium
B. Copper, tin and zinc
C. Copper and lead
D. None of these
H2SO4 (< 50% concentration) is corrosive to_________________?
A. Aluminium, mild steel, stainless steel, concrete & tin
B. Copper, cast iron & high silicon iron (14% Si)
C. Rubber (butyl and hard), silicone rubber & Teflon
D. Glass, graphite, porcelain & stoneware
Which of the following crystal structures characterises the austenitic stainless steel ?
A. Simple hexagonal
B. Body centred cubic
C. Face centred cubic
D. None of these
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