a) friction between plates is considered
b) distribution of direct stress on portions of plates between rivet holes is uniform
c) bending stresses are considered
d) shear stress is not uniform on cross section of rivet

Answer: b
Explanation: The assumptions for rivet connection are : (i) friction between plates is neglected, (ii) distribution of direct stress on portions of plates between rivet holes is uniform, (iii) shear stress is uniform on cross section of rivet, (iv) bending stresses are neglected.