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.Management Sciences
Category: Strength of Materials
Poisson’s ratio is defined as the ratio of_________________?
A. longitudinal stress and longitudinal strain
B. longitudinal stress and lateral stress
C. lateral stress and longitudinal stress
D. lateral stress and lateral strain
E. none of the above
The maximum frictional force which comes into play when a body just begins to slide over another surface is called________________?
A. limiting friction
B. sliding friction
C. rolling friction
D. kinematic friction
E. dynamic friction
The materials having same elastic properties in all directions are called________________?
A. ideal materials
B. uniform materials
C. isotropic materials
D. paractical materials
E. elastic materials
Which of the following materials is most elastic_________________?
A. rubber
B. plastic
C. brass
D. steel
E. glass
During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is___________________?
A. 4 tonnes/cm2
B. 8 tonnes/cm2
C. 16 tonnes/cm2
D. 22 tonnes/cm2
E. none of the above
The internal reaction in bottom 80 cm length will be________________?
A. same in both cases
B. zero in first case
C. different in both cases
D. data are not sufficient to determine same
E. none of the above
If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella ________________________?
A. more inclined when moving
B. less inclined when moving
C. more inclined when standing
D. less inclined when standing
E. none of the above
A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is__________________?
A. 0°
B. 30°
C. 45°
D. 60°
E. 90°.
Which is the false statement about true stress-strain method______________?
A. It does not exist
B. It is more sensitive to changes in both metallurgical and mechanical conditions
C. It gives, a more accurate picture of the ductility
D. It can be correlated with stress-strain values in other tests like torsion, impact, combined stress tests etc.
E. It can be used for compression tests as well.
The stress necessary to initiate yielding is_________________?
A. considerably greater than that necessary to continue it
B. considerably lesser than that necessary to continue it
C. greater than that necessary to stop it
D. lesser than that necessary to stop it
E. equal to that necessary to stop it
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