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Quiz Description :
Name: SOM Assertion & Reasoning Type Questions
Subject: Strength of Material
Questions: Objective type
Time Allowed: 16 minutes
Important for: B. Tech. / M. Tech. Mechanical, Civil, Robotics, Mechatronics Engineering Students job interview or written exam.
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- Question 1 of 14
1. Question1 points
Assertion: If a rigid body is in equilibrium then the vector sum of the forces acting on the body is zero.
Reason: Vanishing of the resultant of the forces acting on a rigid body is a sufficient condition for the body to be in equilibrium.CorrectIncorrectUnattempted
- Question 2 of 14
2. Question1 points
Assertion: Strain is a fundamental behavior of the material, while stress is a derived concept.
Reason: Strain does not have a unit while stress has unit.CorrectIncorrectUnattempted
- Question 3 of 14
3. Question1 points
Assertion: Strain is a fundamental behavior of the material, while the stress is a derived concept.
Reason: Strain does not have a unit while the stress has a unit.CorrectIncorrectUnattempted
- Question 4 of 14
4. Question1 points
Assertion: The amount of elastic deformation at a certain point, which an elastic body undergoes, under given stress is the same irrespective of the stresses being tensile or compressive.
Reason: The modulus of elasticity and Poisson’s ratio are assumed to be the same in tension as well as compression.CorrectIncorrectUnattempted
- Question 5 of 14
5. Question1 points
Assertion: A mild steel tension specimen has a cup and cone fracture at failure.
Reason: Mild steel is weak in shear and failure of the specimen in shear takes place at 45° to the direction of the applied tensile force.CorrectIncorrectUnattempted
- Question 6 of 14
6. Question1 points
Assertion: In the case of a cylindrical structure carrying water under pressure, the maximum hoop stress is on a longitudinal plane through the centre of its cross-section.
Reason: The area of section of a cylinder by a longitudinal plane is inversely proportional to the chord length of the end section.CorrectIncorrectUnattempted
- Question 7 of 14
7. Question1 points
Assertion: The inclination of the line joining any point ‘p’ on the Mohr’s circle and the origin ‘o’ with x-axis equals twice the angle between the resultant stress and the normal of the plane for which P stands.
Reason: The inclination of the line joining any point ‘p’ on the Mohr’s circle and the centre of the circle ‘c’ with x-axis equals twice the angle between the planes for which P stands and zero degree plane.CorrectIncorrectUnattempted
- Question 8 of 14
8. Question1 points
Assertion: The maximum bending moment occurs where the shear force is either zero or changes sign.
Reason: If the shear force diagram line between the two points is horizontal, the BM diagram line is inclined. But if the SF (Shear Force) diagram is inclined, the BM diagram is a parabola of second degree.CorrectIncorrectUnattempted
- Question 9 of 14
9. Question1 points
Assertion: I-section is preferred to rectangular section for resisting bending moment.
Reason: In I-section more than 80% of bending moment is resisted by flanges only.CorrectIncorrectUnattempted
- Question 10 of 14
10. Question1 points
Assertion: A beam of circular cross-section in comparison to rectangular section of the same material but of equal cross-sectional area can resist a large shear force.
Reason: The maximum intensities of shear stress in the sections of a beam of circular cross-section are 1 1/3 times and 1 ½ times the average shear stress respectively.CorrectIncorrectUnattempted
- Question 11 of 14
11. Question1 points
Assertion: The buckling load for a column of specified material, cross-section and end conditions calculated as per Euler’s formula varies inversely with the column length.
Reason: Euler’s formula takes into account the end conditions in determining the effective length of column.CorrectIncorrectUnattempted
- Question 12 of 14
12. Question1 points
Assertion: The Bending Moment (BM) due to any load at all sections of an arch, is less than the BM at all sections of a simple beam having the same span of arch under the same load.
Reason: The moment due to horizontal thrust of the arch is hogging.CorrectIncorrectUnattempted
- Question 13 of 14
13. Question1 points
Assertion: In the analysis of rigid frames, the usual practice is to consider the strain energy due to flexure only.
Reason: The strain energies due to axial and shear forces are usually quite small compared to that flexure.CorrectIncorrectUnattempted
- Question 14 of 14
14. Question1 points
Assertion: Whether it is maximum BM at a section or absolute maximum BM, the moving UDL should cover the entire span of a simple beam if span is less than load length.
Reason: Whether it is maximum BM at a section or absolute maximum BM, the moving UDL should be divided by the section in the same ratio in which the section divides the span is less than load length.CorrectIncorrectUnattempted