For better fuuidity of the molten metal, the following is added in blast furnace
A.Line
B.Sulphur
C.Carbon
D.Oil
E.Manganese
Category: Engineering Materials Mcqs
A body which is permanently deformed is said to have undergone
A.Elastic deformation
B.Limit of elastic deformation
C.Uniform deformation
D.Non-uniform deformation
E.None of the above
When piece of 0.2% carbon steel is heated above third critical point the steel is a solid solution of carbon in gamma iron and called
A.Austenite
B.Pearlite
C.Cementite
D.Eutectoid
E.Ferrite
The property of material by which it can be rolled into sheets is called
A.Plasticity
B.Elasticity
C.Malleability
D.Ductility
E.Creep
German silver is an alloy of
A.Nickel, copper and zinc
B.Silver, copper and niclel
C.Silver, copper and lead
D.Silver, gold and platinum
E.Silver with impurities below 1%
Which of the following class of materials are good conductors of heat and electricity?
A.Metals
B.Ceramics
C.Polymers
D.Dielectries
A non-crystalline polymer which can be stretched to more than twice its original length and which contracts quickly on releasing the load, is known as
A.copolymer
B.dilatant
C.plastic
D.elastomer
Polyethylene is produced by
A.Condensation polymerization
B.Addition polymerization
C.Colpolymerization of ethylene monomers
D.None of the above
When a normal atom loses an electron, the atom
A.Becomes a positive ion
B.Becomes a negative ion
C.Becomes a electrically neutral
D.Is then free to move about
E.None of the above
