[amp_mcq option1=”1.25 times the average” option2=”1.50 times the average” option3=”1.75 times the average” option4=”2.0 times the average” correct=”option1″]
The correct answer is: The maximum shear stress (qmax) in a rectangular beam is 1.50 times the average.
The shear stress in a beam is the force per unit area that acts parallel to the cross-section of the beam. The average shear stress is equal to the shear force divided by the area of the cross-section. The maximum shear stress occurs at the neutral axis of the beam, which is the axis that passes through the centroid of the cross-section. The maximum shear stress is equal to 1.5 times the average shear stress.
The following is a brief explanation of each option:
- Option A: 1.25 times the average. This is incorrect because the maximum shear stress is not equal to 1.25 times the average shear stress.
- Option B: 1.50 times the average. This is the correct answer because the maximum shear stress is equal to 1.5 times the average shear stress.
- Option C: 1.75 times the average. This is incorrect because the maximum shear stress is not equal to 1.75 times the average shear stress.
- Option D: 2.0 times the average. This is incorrect because the maximum shear stress is not equal to 2.0 times the average shear stress.