The ability of a tool to resist softening at high temperatures is known as
A.Super hardness
B.Red hardness
C.Extended hardness
D.Double hardness
E.None of the above
Category: Engineering Materials Mcqs
The process of zinc coating used extensively for protecting steel from atmospheric deterioration is known as
A.Anodizing
B.Colourizing
C.Pakerizing
D.Galvanizing
E.None of the above
Bainiti is a fine maxture of
A.ferrite and cementite
B.cementitie and peoitite
C.pearlite and ferrite
D.austenti and ferrite
Identify the correct relation
A.Mass number – Atomic number = Number of neutrons
B.Mass number – Atomic number = Number of protons
C.Number of neutrons – Number of protons = Mass number
D.Number of electrons outside the nucleus – Number of proton = Mass number
E.None of the above
The limitations of electroforming are
A.Cost is high
B.Production rate is generally very low
C.Recesses can be easily formed
D.(A) and (B) above
E.(A) and (C) above
A bearing alloy should have
A.Capacity to withstand shocks and vibrations
B.Low coefficient of friction
C.High compressive strength
D.High resistance to corrosion
E.All above
Which of the following is the hardest material?
A.High speed steel
B.Stainless steel
C.Cemented carbide
D.Gold
E.Diamond
Tensile strength of common varieties of cast iron is in the range
A.40 – 50 M Pa
B.50 – 80 M Pa
C.140 – 500 M Pa
D.500 – 650 M Pa
E.650 – 1000 M Pa
Selenium is
A.Intrinsic semi-conductor
B.Extrinsic semi-conductor
C.P-type semi-conductor
D.N-type semi-conductor
E.None of the above
Some engineering materials are made up of more than one phase, with different mechanical properties, such materials are known as
A.Discontinuous
B.Brittle
C.Plastic
D.Heterogeneous
E.None of the above
