Civil Engineering: Mechanics of Solid (MOS) MCQs
1. Question
The Poisson’s ratio is defined as
|axial stress/lateral stress|
|lateral strain/axial strain|
|lateral stress/axial stress|
|axial strain/lateral strain|
Answer
2. Question
Two people weighing W each are sitting on a plank of length L floating on water at L/4 from either end. Neglecting the weight of the plank, the bending moment at the centre of the plank is
WL/4
WL/16
WL/32
zero
Answer
3. Question
The major and minor principal stresses at a point are 3MPa and -3MPa respectively. The maximum shear stress at the point is
Zero
3MPa
6MPa
9MPa
Answer
4. Question
The number of independent elastic constants for a linear elastic isotropic and homogeneous material is
4
3
2
1
Answer
5. Question
The effective length of a column of length L fixed against rotation and translation at one end and free at the other end is
0.5 L
0.7 L
1.414 L
2 L
Answer
6. Question
A solid circular shaft of diameter d and length L is fixed at one end and free at the other end. A torque t is applied at the free end. The shear modulus of the material is G. The angle of twist at three free ends is
16TL/ π d^4 G
32TL/ π d^4 G
64TL/ π d^4 G
128TL/ π d^4 G
Answer
7. Question
A disc of radius r has a hole of radius r/2 cut-out as shown. The centroid of the remaining disc (shaded portion) at a radial distance from the centre “O” is
r/2
r/3
r/6
r/8
Answer