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Quiz Description :
Name: SOM Assertion & Reasoning Type Questions
Subject: Strength of Material
Topic: Mix
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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 Answered
 Review
 Question 1 of 14
1. Question
1 pointsAssertion: 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. Question
1 pointsAssertion: 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. Question
1 pointsAssertion: 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. Question
1 pointsAssertion: 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. Question
1 pointsAssertion: 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. Question
1 pointsAssertion: 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 crosssection.
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. Question
1 pointsAssertion: The inclination of the line joining any point ‘p’ on the Mohr’s circle and the origin ‘o’ with xaxis 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 xaxis equals twice the angle between the planes for which P stands and zero degree plane.
CorrectIncorrectUnattempted  Question 8 of 14
8. Question
1 pointsAssertion: 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. Question
1 pointsAssertion: Isection is preferred to rectangular section for resisting bending moment.
Reason: In Isection more than 80% of bending moment is resisted by flanges only.
CorrectIncorrectUnattempted  Question 10 of 14
10. Question
1 pointsAssertion: A beam of circular crosssection in comparison to rectangular section of the same material but of equal crosssectional area can resist a large shear force.
Reason: The maximum intensities of shear stress in the sections of a beam of circular crosssection are 1 1/3 times and 1 ½ times the average shear stress respectively.
CorrectIncorrectUnattempted  Question 11 of 14
11. Question
1 pointsAssertion: The buckling load for a column of specified material, crosssection 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. Question
1 pointsAssertion: 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. Question
1 pointsAssertion: 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. Question
1 pointsAssertion: 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