All elastic materials
A.Elongate on the application of load
B.Shrink on the application of load
C.Permanently deform under load
D.Do not deform under load
E.None of the above
Category: Strength Of Materials Mcqs
In case of thin walled cylinders the ratio of hoop stress to maximum shear stress stress is
A.2
C.4
E.None of the above
An unknown weight falls through 1 cm on a collar rigidly attached to the lower end of a vertical bar 3 m long and 6 m2 in section. If the maximum instantaneous extension is 2 mm the value of stress would be
A.500 kg/cm2
B.667 kg/cm2
C.1000 kg/cm2
D.1333 kg/cm2
E.1500 kg/cm2
The area around the centre of gravity of a cross-section within which any load applied will produce stress of only one sign throughout the entire cross-section, is known as
A.Centroid
B.Neutral zone
C.Symmetrical
D.Balance zone
E.Kern
In design of a shaft, pulley and key for a system
A.Shaft is the weakest member
B.Pulley is the weakest member
C.Key is the weakest member
D.All are designed equally strong
E.None of the above
The ratio of maximum shear stress to the average shear stress in a rectangular beam subjected to torsion is
A.2?3
B.3?4
C.4?5
D.5?4
E.3?2
The stress strain curve for a glass rod during tensile test would exhibit
A.A straight line
B.A parabola
C.A sudden break
D.An irregular curve
E.None of the above
The moment of inertia of an area will be least with respect to
A.Central axis
B.Horizontal axis
C.Vertical axis
D.Moment of area is same through all axes
E.Moment of area does not depend on axes
The value of Poisson’s ratio for cork is
A.Zero
B.0.1
C.0.2
D.0.3
E.0.44
Which section is normally preferred for an eccentrically loaded strut?
A.Solid
B.Hollow
C.Composite
D.Reinforced
E.Any of the above
