27) In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

28) The value of stress concentration factor depends upon

29) Which of the following material has the maximum ductility?

30) When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

31) In order to obtain the bolts of uniform strength, an axial hole is drilled through the head as far as the threaded portion such that the area of shank becomes equal to the root area of the thread.