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17th January 2017, 05:16 PM
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Join Date: Aug 2012
Re: ONGC Exam Paper Mechanical Engineering

Don’t worry I will get the ONGC, Mechanical Engineering paper so that you can prepare easily for it.

Here is the exam paper

1 What is the difference between isotropic and anisotropic materials?
Ans If a material exhibits same mechanical properties regardless of loading direction, it is isotropic eg., homogeneous cast materials. Materials lacking this property are anisotropic

2 what are orthotropic materials
It is a special class of anisotropic materials which can be described by giving their properties in three perpendicular direction et wood composites

3 A plain carbon steel has BHN of 180 What are values of Rc, VHN and ultimate strength?
Ans Rc-RHN/10 18,VHN BHN 180

4 What properties need to be considered for applications calling for following requirement: Irigdity strength for no plastic deformation under static load wear resistance reliability and safety

Ans Rigidity- elastic modules and yield strength Strength for no plastic deformation under static loading-yield point Wear resistance-Hardness Reliability and safety-Endurance limit and yield point

5 Explain the effects of alloying chromium and nickel in stainless steel.
Addition of nickel and chromium increases the tensile strength and increase in resistance to corrosion takes place.

ONGC, Mechanical Engineering paper





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