Corrosion is a destructive attack on metals
A.Which may be chemical or electrochemical in nature
B.Which is basically caused by atmospheric air
C.Which is caused by contact with other metals
D.At high temperature
E.None of the above
Category: Engineering Materials Mcqs
Viscoelastic materials show behaviour which is
A.Time dependent
B.Independent of time
C.Elastic
D.Inelastic
E.Plastic
Which of the following polymer is crystalline?
A.Polyethylene
B.Polymethyl metacrylate
C.Polyvinyl chloride
D.Polyvinylidene chloride
When the metals are severely deformed in a particular direction, as in rolling or forging (on a macro scale), the mechanical properties may be
A.Identical
B.Isotropic
C.Anisotropic
D.Uniform
E.Non-uniform
Galvanizing is generally done on
A.Low carbon steels
B.Cast iron
C.Non-ferrous metals
D.Non-metallic substances
E.None of the above
In electro-forming the metal is supplied to the mould from
A.Solution
B.By liquids
C.Electrolytic solution in which bar of pure metal acts as an anode for the plating current
D.Separately by coating with a point
E.None of the above
The cast iron has
A.High ductility
B.High malleability
C.High tensile strength
D.Elastic limit close to ultimate breaking strength
E.None of the above
In press work the dies that perform two or more operations simultaneously, but at different stations are known as
A.Simple dies
B.Compound dies
C.Progressive dies
D.Die and punch set
E.Multi-dies
Which process is used primarily to obtain surface finish
A.Parkerizing
B.Shining
C.Broaching
D.Electroforming
E.Swaging
Which of the following method cannot be used for thermoplastic materials?
A.Extrusion
B.Blow moulding
C.Injection moulding
D.All of the above
