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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 8
11.
Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the
existence of thermal boundary layer.
temperature gradient produced due to density difference
buoyancy of the bubbles produced at active nucleation site.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Evaporator tubes are generally
horizontal
vertical
inclined
random
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
In a boiling curve, the peak heat flux is called the __________ point.
Nusselt
Leidenfrost
boiling
burnout
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Pick out the wrong statement.
Heat transfer from a hot body to cold body by the emission of heat waves is called radiation:
Filmwise condensation takes place on non-wettable surfaces.
The boiling point of a solution is affected by liquid head as well as boiling point elevation.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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