Fundamentals of Machine Design (3141907) MCQs

MCQs of Flexural stresses

Showing 11 to 16 out of 16 Questions
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11.
In simple bending theory, one of the assumptions is that the material of the beam is isotropic. This assumption means that the
(a) normal stress remains constant in all directions
(b) normal stress varies linearly in the material
(c) elastic constants are the same in all the directions
(d) elastic constants vary linearly in the material
Answer:

Option (c)

12.
In simple bending theory, one of the assumptions is that the plane sections before bending remain plane after bending. This assumption means that
(a) stress is uniform throughout the beam
(b) the strain is uniform throughout the beam
(c) stress is proportional to the distance from the neutral axis
(d) the strain is proportional to the distance from the neutral axis
Answer:

Option (d)

13.
Which of the following statement is wrong?
(a) In the theory of simple bending, the assumption is that the plane sections before bending remains plane after bending.
(b) In a beam subjected to bending moment, the strain is directly proportional to the distance from the neutral axis.
(c) At the neutral axis of a beam, the bending stress is maximum.
(d) The bending stress in a beam is inversely proportional to the section modulus.
Answer:

Option (c)

14.
On one side of a neutral axis of a beam, there is tensile stress and on the other side of the beam, there is compressive stress.
(a) Agree
(b) Disagree
Answer:

Option (a)

15.
The neutral axis of the symmetrical beam does not pass through the centroid of the beam.
(a) Agree
(b) Disagree
Answer:

Option (b)

16.
In a beam subjected to pure bending, the intensity of stress in any fibre is __________ the distance of the fibre from the neutral axis.
(a) equal to
(b) less than
(c) more than
(d) directly proportional to
Answer:

Option (d)

Showing 11 to 16 out of 16 Questions
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