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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.

A. True
B. False

Option A

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The constant factor in case of R10 series of preferred numbers is A. 1.06 B. 1.12 C. 1.26 D. 1.58	The value of stress concentration factor depends upon A. material of the part B. geometry of the part C. material and geometry of the part D. none of these