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.Management Sciences
Category: Materials and Construction
A material is called ‘ductile’, if it can be__________________?
A. Drawn into wires
B. Hammered to a thin sheet
C. Fractured without deformation
D. Made lustrous by heating it
18/8 stainless steel means, that it contains__________________?
A. 18% chromium and 8% nickel
B. 18% chromium and 8% molybdenum
C. 18% nickel and 8% chromium
D. 18% molybdenum and 8% chromium
Maximum consumption of lead is in the manufacture of _________________________?
A. Storage batteries
B. Solder alloys
C. Electric cable sheathing
D. Lead lined vessels
The fermenter used in the production of penicillin (by deep fermentation process) is made of___________________?
A. Glass
B. Glass lined steel
C. High silicon cast iron
D. Porcelain
Metal at the top of the electromotive series is________________?
A. Least active
B. Most stable
C. Most active
D. Most noble
Light weight metallic alloy used in aircraft industry is________________?
A. Aluminium
B. High silicon (14%) iron
C. Duralumin
D. Phosphor bronze
Addition of ______________ in steel is helpful in increasing the depth of hardness?
A. Chromium
B. Sulphur
C. Vanadium
D. Tungsten
Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of_________________?
A. Brass
B. Copper
C. High carbon steel
D. Aluminium
In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of_____________________?
A. Stainless steel
B. Cast iron
C. Lead lined steel
D. Rubber lined steel
Corrosion involves exchange of electrons in ____________ corrosion?
A. Chemical
B. Electrochemical
C. Both A. & B.
D. Neither A. nor B.
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