Chemical Engineering - Chemical Engineering Basics

31. 

The normal stress is the same in all directions at a point in a fluid, only when the fluid

A. is at rest & has zero viscosity.
B. is frictionless.
C. fluid layer has no motion relative to an adjacent layer of fluid.
D. is incompressible & frictionless.

Answer: Option D

Explanation:

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32. 

A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2 is

A. 8.82
B. 9.81
C. 10.88
D. 0.95

Answer: Option A

Explanation:

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33. 

In chemical dehumidification of air

A. both specific humidity & dry bulb temperature increases.
B. both specific humidity & dry bulb temperature decreases.
C. specific humidity decreases & dry bulb temperature increases.
D. specific humidity increases & dry bulb temperature decreases.

Answer: Option C

Explanation:

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34. 

What is the pH of distilled water ?

A. 0
B. 1
C. 7
D. 14

Answer: Option C

Explanation:

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35. 

Pick out the correct statement.

A. Hot worked materials are subjected to annealing to remove internal stresses.
B. Annealing of steel hardens it slightly
C. Normalising of a material induces stresses.
D. Tempering of a material improves ductility & toughness but reducess hardness & brittlenes.

Answer: Option D

Explanation:

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