MECHANICAL ENGINEERING INTERVIEW QUESTIONS

MECHANICAL ENGINEERING INTERVIEW QUESTIONS

1.)What is the difference between Production and Manufacturing?
Ans:-Production is an term denoting the activity performed right procuring raw material to finally packing and sending it to the receiver end.
Manufacturing is an term denoting a particular process like machining, shaping etc.

2.)What is the difference between displacement pumps and centrifugal pump?
Ans:-Displacement pump is a device which deliver a constant volume of liquid for each cycle at varying discharge (Q) pressure or HEAD.
Centrifugal pump is a device in which high velocity of the liquid will then produce a velocity head and at the same time producing a high flow rate

3.)What are the rules that must be kept in mind while designing castings?
Ans:-Some of the points that must be kept in mind during the process of cast designing are as follows:

•  To avoid the concentration of stresses sharp corners and frequent use of fillets should be avoided.
•  Section thicknesses should be uniform as much as possible. For variations it must be done gradually.
•  Abrupt changes in the thickness should be avoided at all costs.
•  Simplicity is the key, the casting should be designed as simple as possible.
•  It is difficult to create true large spaces and henceforth large flat surfaces must be avoided.
•  Webs and ribs used for stiffening in castings should as minimal as possible.
•  Curved shapes can be used in order to improve the stress handling of the cast.