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.Management Sciences
Category: Materials and Construction
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
Wrought iron is ____________________?
A. High carbon iron
B. Highly resistance to acid corrosion
C. Malleable & ductile; and hence is used for chain links, hooks & couplings
D. An alloy of iron, chromium & carbon
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?
A. Silicon steel
B. Chromium steel
C. Molybdenum steel
D. None of these
Addition of nickel to copper improves its_________________?
A. Machinability
B. Ductility
C. Strength
D. Hardness
Refined acetic acid storage vessel are made of___________________?
A. Copper
B. Aluminium
C. High carbon steel
D. Nickel
Combination of metals and ceramics are called___________________?
A. Metalloy
B. Cermets
C. Pellets
D. Non-crystalline ceramics
Corrosion resistance of steel is increased by the addition of_________________?
A. Phosphorous and tungsten
B. Nickel and chromium
C. Lead and vanadium
D. Molybdenum and tungsten
Monel metal is an alloy of__________________?
A. Molybdenum and nickel
B. Nickel and copper
C. Molybdenum and aluminium
D. Molybdenum and zinc
Locomotive boiler tubes are made of _____________ alloys?
A. Arsenic copper
B. Magnesium
C. Aluminium
D. Nickel
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