Chemical Engineering - Chemical Engineering Basics

41. 

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

A. Gr0.25, Gr
B. Gr0.25, Gr0.33
C. Gr, Gr0.25
D. Gr0.33, Gr0.25

Answer: Option A

Explanation:

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42. 

If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity

A. is trebled.
B. remains unchanged.
C. decreases by a factor of 3.
D. decreases by a factor of 1/3.

Answer: Option B

Explanation:

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43. 

Copper deposits are found in India at the following location:

A. Kudremukh
B. Kolar
C. Khetri
D. Ramagundam

Answer: Option C

Explanation:

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44. 

Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.

A. 10-3
B. 103
C. 10-15
D. l015

Answer: Option A

Explanation:

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45. 

Corrosion of metals can not be prevented by its

A. tempering
B. chromising
C. aluminising
D. alloying

Answer: Option A

Explanation:

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