A body which does not contain voids or empty spaces is known as
A.Continuous body
B.An isotropic body
C.Heterogeneous body
D.Crystalline body
E.None of the above
Category: Engineering Materials Mcqs
Most of the energy expended in deforming a metal by cold working is
A.Utilised in overcoming deformation stresses
B.Utilised in deforming the metal
C.Converted into heat
D.Consumed in developing internal stresses
E.None of the above
The fatigue limit of a shaft connot be increased by
A.Under stressing
B.Surface decarburisation
C.Shot peening
D.Nitriding of the surface
E.Cold working
DIN standards are used in
A.India
B.Germany
C.Britain
D.France
E.USSR
The property of metal when the recovery after unloading is complete but not instantaneous is
A.Elasticity
B.Plsticity
C.Inelasticity
D.An elasticity
E.Visco elasticity
Induction hardening is the process of
A.Hardening the core
B.Uniform hardening
C.Selective hardening
D.Hardening surface for wear resistance
E.Electrical hardening process
The critical points for steels
A.Occur at same temperature for all steels
B.Change the chemical composition of steel
C.May change in number on heating or cooling
D.Cause change in physical properties
E.Indicate the minimum temperature below which structural changes in steel are not possible
Fatigue cracks in metals normally start at
A.Centre of the specimen
B.Core of the specimen
C.Ends of the specimen
D.Surface of the specimen
E.Any spot in the specimen
The phenomenon of ‘weld decay’ is associated with
A.Cast iron
B.Manganese steels
C.Aluminium alloys
D.Brass
E.Stainless steels
Hard steels and non-ferrous metal do not exhibit a definite yield point when pulled in the testing machine and for such cases a better measure of their elastic properties is defined by
A.Yield point stress
B.Yield point strain
C.Proof stress
D.Ultimate stress
E.None of the above
