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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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- Question 1 of 14
##### 1. Question

1 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.CorrectIncorrect - Question 2 of 14
##### 2. Question

1 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.CorrectIncorrect - Question 3 of 14
##### 3. Question

1 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.CorrectIncorrect - Question 4 of 14
##### 4. Question

1 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.CorrectIncorrect - Question 5 of 14
##### 5. Question

1 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.CorrectIncorrect - Question 6 of 14
##### 6. Question

1 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.CorrectIncorrect - Question 7 of 14
##### 7. Question

1 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.CorrectIncorrect - Question 8 of 14
##### 8. Question

1 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.CorrectIncorrect - Question 9 of 14
##### 9. Question

1 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.CorrectIncorrect - Question 10 of 14
##### 10. Question

1 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.CorrectIncorrect - Question 11 of 14
##### 11. Question

1 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.CorrectIncorrect - Question 12 of 14
##### 12. Question

1 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.CorrectIncorrect - Question 13 of 14
##### 13. Question

1 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.CorrectIncorrect - Question 14 of 14
##### 14. Question

1 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.CorrectIncorrect