Chemical Engineering - Chemical Engineering Basics

31. 

The speed of sound will be maximum in

A. vacuum
B. metal
C. air
D. water

Answer: Option B

Explanation:

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32. 

Work done by a/an __________ process is determined by.

A. adiabatic
B. quasi-static
C. isothermal
D. isentropic

Answer: Option B

Explanation:

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33. 

In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

A. less
B. more
C. equal
D. unpredictable

Answer: Option A

Explanation:

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34. 

__________ number is sometimes used in place of Grashoff number in free convection heat transfer.

A. Stanton
B. Brinkman
C. Rayleigh
D. Nusselt

Answer: Option C

Explanation:

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35. 

Wrought iron does not have the

A. uniform strength in all directions.
B. ability to hold protective coating.
C. high ductility & corrosion resistance.
D. easily weldable characteristics.

Answer: Option A

Explanation:

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