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065/23

The centre of gravity of a solid hemisphere of radius r lies at a distance of
A) (3/8)r from the base B) (8/3)r from the base
C) (3/4)r from the base D) None of these

The area of a section is in mm? and the distance of the centre of area from a line is in mm,
then the units of the moment of inertia of the section about the line is expressed in

A) mm? B) mm? Cc) mm> D) mm*

The shear force and bending moment are zero at the free end of a cantilever beam,
if it carries a

A) Point load at the free end

B) Point load at the middle of its length

C) Uniformly distributed load over the whole length

D) None of the above

A beam extending beyond the supports is called

A) Simply supported beam B) Overhanging beam
C) Fixed beam D) Cantilever beam

For a given material, the modulus of rigidity is 100 GPa and the Poisson’s ratio is
0.25. The value of modulus of elasticity is

A) 150 GPa B) 225 GPa C) 125 GPa D) 250 GPa
Within elastic limit in a loaded material, stress is
A) Inversely proportional to strain B) Directly proportional to strain

C) Equal to strain D) None of the above

When a body is subjected to three mutually perpendicular stresses of equal intensity,
the ratio of direct stress to the corresponding volumetric strain is known as

A) Poisson’s ratio B) Modulus of elasticity
C) Modulus of rigidity D) Bulk modulus

A steel bar is heated from 15°C to 40°C and it is free to expand. The bar will
induce

A) Shear stress B) Tensile stress
C) No stress D) Compressive stress

When a solid shaft is subjected to torsion, the shear stress induced in the shaft at
its centre is

A) Zero B) Minimum C) Maximum D) Average