ONGC Old Papers Mechanical

Hello sir I am Rohan, will you please provide me the Old Placement Paper of Mechanical engineering of ONGC so will you please provide me the paper??

[Kiran Chandar]

Hey!! As per your demand here I am providing you Placement Paper of Mechanical engineering of ONGC

1 What is the difference between isotropic and anisotropic materials?

2 what are orthotropic materials

3 A plain carbon steel has BHN of 180 What are values of Rc, VHN and ultimate strength?

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

5 Explain the effects of alloying chromium and nickel in stainless steel.

6 Mention two types of dislocation,

7 What are the principal constituents of brass?

8 what is curie point?

9 Specific strength of materials is very high when they are in fiber size but lower when they are in bar form-Why?

10 what is the percentage of carbon in cast iron?

11 Which element is added in steel to increase resistance to corrosion?

12 whether individual component material retain their characteristics or not

13 An elastomer is a polymer when its percentage elongation rate is

14 If % elongation of material is more tha 200% it is classed as

15 Why is it that the maximum value which the residual stress can reach is the elastic limit of the material?

16 Why fatigue strength decreases as size of a part increase beyond around 10 mm?

17 Distinguish between creep and fatigues

18 While normal carbursing and nitriding surface treatments increase fatigue strength excessive treatment may decrease the fatigue strength Why

19 List at least two factors that promote transition form ductile to brittle fracture

20 Which theories of failure are used for (a) ductile material and (b) brittle materials

21 what is stellite?

22 Car tyres are usually made of

23 What is the structure of pure iron and whether it is soft or hard?

24 which elements increase the corrosion resistance of steel?

25 Which rays are produced by cobalt 60 in industrial radiography?