Gulf Petrochemical Services & Trading Mechanical Engineer Interview Questions and Answers

The number of gaskets in a floating head heat exchanger varies depending on the design and size of the exchanger.

• The number of gaskets is typically determined by the number of tube passes in the heat exchanger.

• Each tube pass may require multiple gaskets, depending on the design.

• The gaskets are used to create a seal between the floating head and the tube sheet.

• The number of gaskets can range from a few to several dozen,...read more

Heat exchangers are devices used to transfer heat between two or more fluids.

• Shell and tube heat exchanger

• Plate heat exchanger

• Fin tube heat exchanger

• Double pipe heat exchanger

• Spiral heat exchanger

• Regenerative heat exchanger

Pumps are devices that use mechanical action to move fluids from one place to another.

• Pumps work by creating a pressure difference to push fluids through a system.

• They typically consist of an inlet, an outlet, and an impeller or rotor.

• The impeller rotates, creating centrifugal force that pushes the fluid outwards.

• Positive displacement pumps use reciprocating or rotary motion to move fluid in discrete volumes.

• Examples o...read more

A stress-strain graph shows the relationship between stress and strain in a material.

• The graph typically has stress on the y-axis and strain on the x-axis.

• It starts with a linear elastic region where stress is directly proportional to strain.

• Beyond the elastic limit, the material enters the plastic region where permanent deformation occurs.

• The graph may show a yield point, ultimate tensile strength, and fracture point.

• ...read more