The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are`varepsilon`_c and `varepsilon`_l respectively. The change in volume of the boiler cylinder per unit volume will be

The shear modulus of resilience is proportional to

A double strap butt joint (with equal straps) is

 
A connecting rod subjected to an axial load may buckle with

 
For a bevel gear having the pitch angle `theta` , the ratio of formative number of teeth (T_E) to actual number of teeth (T) is

 
In a nut and
bolt, the diameter at which the ridges on the bolt are in complete touch
with the ridges of the corresponding nut, is called pitch diameter.

A coupling used to connect two perfectly aligned shafts, is

 
When the fulcrum is in between the load and effort, the lever is said to be of

The V-belt is used to transmit great amount of power and when the two pulleys are very near to each other.