Related Questions

Slow plastic deformation of metals under a constant stress is known as
A Creep
B Fatigue
C Endurance
D Plastic deformation
Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called
A Strain
B Stress
C Pressure
D Modulus of elasticity
An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonion fluid beyond yield stress. Which of the following is an ideal plastic?
A Sewage sludge
B Rubber latex
C Blood
D Sugar solution
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.
A Working
B Damaging
C Allowable
D None of these
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as
A Rigid
B Tough
C Ductile
D Plastic
Slow and progressive deformation of a material with time under constant stress is called
A Creep
B Erosion
C Resilience
D None of these
Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the
A Ultimate tensile strength (U.T.S.)
B Endurance limit
C Elastic limit
D None of these
According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
A 0.5
B 2
C $$\sqrt 2 $$
D $$\sqrt {\frac{3}{2}} $$
The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is
A Same
B Double
C Half
D Four times
The deformation of a bar under its own weight is _________ the deformation, if the same body is subjected to a direct load equal to weight of the body.
A Equal to
B Half
C Double
D Quadruple

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