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.Management Sciences
Category: Materials and Construction
Pick out the wrong statement?
A. Bronze is an alloy of copper & tin
B. Brass is an alloy of copper & zinc
C. The alloy named ‘German silver’ does not contain any silver
D. The ability of a material to fracture without appreciable deformation is called its ductility
Trough of an apron conveyor is made of___________________?
A. Lead lined concrete vessel
B. Wood
C. Metal
D. Either B. or C.
Tank furnace used for melting of glass is made of___________________?
A. Mild steel
B. Cast iron
C. Refractory blocks
D. Stainless steel
The maximum percentage of chromium that can be added to steel is about____________________?
A. 12
B. 18
C. 24
D. 30
The crystal structure of most of the common metals is_____________________?
A. Orthorhombic
B. Cubic
C. Hexagonal
D. None of these
Materials having _____________ lattice structure are usually most ductile?
A. FCC
B. BCC
C. HCP
D. Cubic
Pick out the wrong statement ?
A. Alloys are harder than their component elements
B. Presence of silicon in steel decreases its electrical resistance
C. Karbate is an acid resistant material of construction
D. Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C
Maximum permissible sulphur content in steel is ______________ percent?
A. 0.015
B. 0.055
C. 0.505
D. 0.805
The hardest material just prior to diamond in Mhos scale is_________________?
A. Topaz
B. Carborundum
C. Corundum
D. Calcite
Iron rust is_________________?
A. Ferrous oxide
B. Hydrated ferric oxide
C. Powdered iron
D. Ferric sulphide
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