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Technical Interview Questions - 5 contains interview questions about corrosion inhibitor in chemical industry , elementary reaction,  non-elementary reaction, leaf filter, plate filter, Manometer, Water softening

51. What is shear stress and shear strain?
52. What is corrosion inhibitor?
53. What is difference between mild steel and stainless steel?
54. Define Exothermic & Endothermic reaction.
55. 

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51. What is shear stress and shear strain?

Shear stress
shear stress is stress (external force) acting on an object or surface parallel to the slope or plane.
τ = F/A
F= force applied       
A= cross sectional area of material
Shear strain: - 

Deformation of solid due to stress.
ε = di/Io
di = change  of length        
Io = initial length

52. What is corrosion inhibitor?

A substance that decreases the rate of metal oxidation called inhibitor.

corrosion inhibitor


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53. What is difference between mild steel and stainless steel?

The most basic difference between mild steel and stain less steel is in their composition.
  • Mild Steel is made from a combination iron and carbon. It is most suitable in the construction industry and for making heavy equipment.
  • Stainless steel made from a combination of chromium and iron. The resulting metal is noncorrosive and resistant to rusting.
mild steel and stainless steel


54. Define Exothermic & Endothermic reaction.
  • Exothermic reaction: - a reaction which release the heat energy.
  • Endothermic reaction: - a reaction which absorb the heat energy.
55. How hard water can be softened?
  • by zeolite process
  • ion exchanger requires






56. What is cloud point & pure point?


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