Chemical Engineering - Heat Transfer

6. 

When vaporisation takes place directly at the heating surface, it is called

A. film boiling
B. nucleate boiling
C. vapour binding
D. none of these

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

7. 

Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively)

A. C/E
B. E/C
C. CE
D.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

8. 

Reynold's analogy states that

A. Nst α f
B. Nst α NRe
C. NNu α f
D. NRe α f

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

9. 

With increase in temperature, the thermal conductivity of non-metallic amorphous solids

A. decreases
B. increases
C. remains constant
D. first decreases upto certain temperature and then increases

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

10. 

Fourier's law applies to the heat transfer by

A. convection
B. radiation
C. conduction
D. all (a), (b) & (c)

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.