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

149) The helix angle for single helical gears ranges from

150) In order to withstand resistance to wear, the best profile of gear is

151) A circular shaft can transmit a torque of 5 kN-m. If the torque is reduced to 4 kN-m, then the maximum value of bending moment that can be applied to the shaft is