Hand driven rivets are commonly used in various engineering applications. The maximum permissible stress for hand driven rivets in shear is an important factor to consider while designing structures. The correct option for the maximum permissible stress for hand driven rivets in shear is option B, i.e., 80 N/mm2.

Explanation:

Hand driven rivets are used to join two or more plates by deforming the rivet shank to form a head on both sides of the plate. The shear stress acting on the rivet is the stress developed when the two plates to be joined are subjected to a force that tends to slide them in opposite directions. The maximum permissible stress for hand driven rivets in shear is determined by the shear strength of the material used for the rivet.

The shear strength of the material used for the rivet is a material property that indicates the maximum shear stress that the material can withstand before it fails in shear. The value of the shear strength of the material used for the rivet is determined by conducting shear tests on the material.

The maximum permissible stress for hand driven rivets in shear is usually taken as a fraction of the shear strength of the material used for the rivet. The fraction is determined based on various factors like the manufacturing process of the rivet, the quality of the rivet, and the type of loading the rivet is subjected to.

For hand driven rivets, the maximum permissible stress in shear is usually taken as 60% to 70% of the shear strength of the material used for the rivet. Therefore, the maximum permissible stress for hand driven rivets in shear can be calculated as follows:

Maximum permissible stress = 0.6 × Shear strength of the material used for the rivet

Assuming the shear strength of the material used for the rivet to be 133 N/mm2, the maximum permissible stress for hand driven rivets in shear can be calculated as follows:

Maximum permissible stress = 0.6 × 133 N/mm2 = 79.8 N/mm2

Hence, the correct option for the maximum permissible stress for hand driven rivets in shear is option B, i.e., 80 N/mm2.