Ongc Petro Additions Mechanical Engg. Design Interview Questions and Answers

Q1. I not selected but I suggest all mechanical engineering do preparation on fluid,thermal, oils hydraulic, machine, metallurgy etc along with aptitude
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Q1. Equipment Maintenance Team Managing work
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Q2. Vehicle and tunnel machine related
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Technical questions+basic engineering

Q1. Overall background
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Q2. Expected salary
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Q1. Basic techniques good tack over running problem and maintain the parts stock
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Q1. How many gasket in floting head heat exchanger
Ans. 
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
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Q2. Types of heat exchanger
Ans. 
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
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Q1. Tell me about yourself.
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Q1. How pumps work?
Ans. 
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
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Q2. Draw Stress Strain graph
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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
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