Strenth of Materials (SoM) Civil Engineering MCQ Questions Answers

Strength of Materials Questions Answers (SoM) – Civil Engineering MCQ

1) A thin walled cylindrical vessel of wall thickness ‘t’ and diameter ‘d’ is filled with gas to a gauge pressure of ‘p’. The maximum shear stress on the vessel wall will then be

a) pd/t

b) pd/2t

c) pd/4t

d) pd/8t

View Answer
Option – d)

2) A thin cylinder of unit length, thickness ‘t’ and radius ‘r’ is subjected to internal pressure ‘p’. What is the circumferential stress?

a) pr/2Et

b) pr/2t

c) pr/t

d) 2pr/t

View Answer
Option – c)

3) The commonly used technique of strengthening thin pressure vessel is

a) Wire winding

b) Shrink fitting

c) Autofrettage

d) Multi-layered construction

View Answer
Option – a)

4) Autofrettage is the method of

a) joining thick cylinders

b) calculating stresses in thick cylinders

c) prestressing thick cylinders

d) increasing the life of thick cylinders

View Answer
Option – c)

5) For the same internal diameter, wall thickness, material and internal pressure, the ratio of maximum stress, induced in a thin cylindrical and in a thin spherical pressure vessel will be

a) 2

b) ½

c) 4

d) ¼

View Answer
Option – a)

6) In a thick-cylinder pressurized from inside, the hoop stress is maximum at

a) The center of the wall thickness

b) the outer radius

c) the inner radius

d) both the inner and the outer radii

View Answer
Option – c)

7) A thick cylinder is subjected to an internal pressure of 60 MPa. If the hoop stress on the outer surface is 150 MPa, then the hoop stress on the internal surface is

a) 105 MPa

b) 180 MPa

c) 210 MPa

d) 135 MPa

View Answer
Option – c)

8) The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to internal hydrostatic pressure is

a) ½

b) 1

c) 2

d) 4

View Answer
Option – c)

9) Wahl’s factor takes into account

a) Curvature of the helical wire

b) Direct shear stress

c) Both curvature and direct shear effect

d) Neither a nor b

View Answer
Option – c)

10) A spring of stiffness I KM/m is stretched initially by 100 mm from the under-formed position. The work required to stretch it by another 100 mm is

a) 5Nm

b) 7 Nm

c) 10 Nm

d) 15 Nm

View Answer
Option – d)
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