A pre-stressed concrete member is preferred because A. Its dimensions are not decided from the diagonal tensile stress B. Large size of long beams carrying large shear force need not be adopted C. Removal of cracks in the members due to shrinkage D. All the above

The correct answer is D. All of the above.

Pre-stressed concrete is a type of concrete that is reinforced with steel cables that are under tension. This tension in the cables helps to counteract the tensile stresses that are caused by the loads on the concrete. This can lead to a number of advantages, including:

• Smaller members: The pre-stressing of the concrete can allow for the use of smaller members, which can lead to cost savings.
• Increased strength: The pre-stressing of the concrete can increase its strength, which can allow for the use of larger loads.
• Reduced cracking: The pre-stressing of the concrete can reduce cracking, which can improve the durability of the member.

In addition, pre-stressed concrete can be used to create members that are curved or have complex shapes. This can be useful for a variety of applications, such as bridges and buildings.

Here is a brief explanation of each option:

• Option A: The dimensions of a pre-stressed concrete member are not decided from the diagonal tensile stress. This is because the pre-stressing of the concrete counteracts the tensile stresses that are caused by the loads on the concrete.
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