The ratio of heat flow Q1/Q2 from two walls of same thickness having their thermal conductivities as ATj – 2K2 will be ________________?

Question: Intermittant tube cleaning is possible to be done in case of a __________ evaporator.
[A].

basket type

[B].

horizontal tube

[C].

calendria

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: In SI units, thermal conductivity is expressed in
[A].

Watt/m.°K

[B].

Watt/m2. °K

[C].

Watt/m2. °K

[D].

Watt/m4. °K

Answer: Option A

Explanation:

No answer description available for this question.

Question: Natural convection is characterised by
[A].

Grashhoff number

[B].

Peclet number

[C].

Reynolds number

[D].

Prandtl number

Answer: Option A

Explanation:

No answer description available for this question.

Question: Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
[A].

convection becomes important

[B].

conduction becomes important

[C].

radiation becomes important

[D].

sub-cooled boiling occurs

Answer: Option C

Explanation:

No answer description available for this question.