144) According to law of gearing, the common normal at the point of contact between a pair of teeth must always pass through the pitch point.

145) An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

146) The major diameter of a screw thread is also known as core or root diameter.

147) The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

148) The property of a material which enables it to be drawn into wires with the application of a tensile force, is called