A solid shaft can resist a bending moment of $$3.0$$ $$kNm$$ and a twisting moment of $$4.0$$ $$kNm$$ together, then the maximum torque that can be applied is

If the ratio of the diameter of river hole to the pitch of rivets is $$0.25$$, then the tearing Efficiency of the joint is

The bolts in a rigid flanged coupling connecting two shafts transmitting power are subjected to

In spur gears, the circle on which the involute is generated is called the