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.Management Sciences
Category: Materials and Construction
Soap kettle used in the production of laundry soap is made of____________________?
A. Steel with top section nickel clad or stainless steel
B. Cast iron
C. Nickel
D. Concrete
Bush bearings are made of______________________?
A. Mild steel
B. Phosphorous bronze
C. White metal alloys
D. None of these
White cast iron as compared to grey cast iron is ________________?
A. More durable
B. Very brittle
C. Very hard
D. All A., B. & C.
Which of the following heat treatment processes is used for softening the hardened material ?
A. Normalising
B. Tempering
C. Annealing
D. None of these
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
A. Lead
B. Copper
C. Aluminium
D. Wrought iron
Cast iron has very high___________________?
A. Compressive strength
B. Ductility
C. Shock resistance
D. Resistance to brittleness
When the steel is subjected to normalising, its ______________ decreases?
A. Yield point
B. Ductility
C. Ultimate tensile strength (UTS)
D. None of these
Plasticisers are added to polymers to improve their____________________?
A. Tensile strength
B. Softness & flexibility
C. Acid resistance
D. Alkali resistance
Glass lined vessels are not used for handling__________________?
A. Dilute H2SO4
B. Dilute HNO3
C. Dilute HCI
D. Hydrofluoric acid
Pick out the correct statement?
A. Stainless steel is nothing but chromium coated steel
B. Hardening of a soft metal can be done by alloying it with another metal or non-metal
C. Plastic deformation of a material is its temporary distortion under the action of applied stress
D. Rusting of iron is not electrochemical in nature
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