MECHANICAL ENGINEERING JOB INTERVIEW QUESTIONS

1.)Explain what you understand by the term hydrostatic paradox ?

Ans: Hydrostatic paradox is the phenomenon that the floor load of water in vessels of different shapes carrying water at same level depends only on the area of the bottom surface and not on the shape of the vessel.

2.)What do you understand by inversions and how many inversions are possible in a kinematic chain having 'n' links ?

Ans: Inversions are different mechanisms obtained by fixing different links in a kinematic chain but keeping relative motions of links unchanged with respect to one another. A kinematic chain

with 'n' links can have 'n' inversions.

3.)What is the difference between a machine and a mechanism ?

Ans: A mechanism consists of links forming a constrained kinematic chain. Its function is basically to transmit or modify motion. A machine is a mechanism but here we are concerned with forces to be transmitted and it is used to modify mechanical work.

4.)Why excess air is required to burn a fuel completely ?

Ans: Excess air is required to ensure adequate mixing of fuel and air, avoid smoke, minimize slagging in coal burning, and to ensure maximum steam output.