Machine Design
The shear plane in case of bolts should

Be normal to threaded portion of shank
Be across threaded portion of shank
Never be across the threaded portion
Be parallel to axis of bolt

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A woodruff key is

Capable of tilting in a recess milled out in the shaft
All of these
Fitted in pairs at right angles
A tapered key with head at one end

ANSWER DOWNLOAD EXAMIANS APP