For heavy loads in aircraft bearings the material used with lead to reduce the risk of scizure is
A.Iron
B.Silver
C.Copper
D.Tin
E.Zinc
Category: Engineering Materials Mcqs
Silicon steel is widely used in
A.Electrical industry
B.Chemical industry
C.For making leaf prings
D.For nuts and bolts
E.For cutting tools
In normalising steel is heated 40-50 C
A.Above room temperature
B.Above the upper transformation range
C.Above the lower transformation range
D.Below the upper transformation range
E.Below the lower transformation range
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
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
