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

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

The helix angle for single helical gears ranges from

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

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)