Chemical Engineering - Heat Transfer

6.
Mode of heat transfer involved in the cooling of air cooled internal combustion engine is
conduction
natural convection
forced convection
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

7.
Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that
there is no internal heat generation.
boundary surfaces are isothermal.
material is anisotropic.
constant temperature gradient exists.
Answer: Option
Explanation:
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8.
The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m2.K. At steady state, the temperature of the right face in °C is
77.2
71.2
63.8
48.7
Answer: Option
Explanation:
No answer description is available. Let's discuss.

9.
In a shell and tube heat exchanger, the shell side fluid velocity can not be changed by changing the
tube layout
tube diameter
tube pitch
no. of baffles
Answer: Option
Explanation:
No answer description is available. Let's discuss.

10.
To reduce the tube side pressure drop for the same flow rate, the heat exchanger recomended is
1-2 heat exchanger
1-1 heat exchanger
3-2 heat exchanger
2-4 heat exchanger
Answer: Option
Explanation:
No answer description is available. Let's discuss.