IndiaBIX

Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 4
46.
Nusselt number (for forced convection heat transfer) is a function of the __________ number.
Prandtl
Reynolds
both (a) & (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Pick out the wrong statement.
Heat transfer by radiation can not occur across an absolute volume.
In case of a shell and tube heat exchanger, the pressure drop through the shell is proportional to the number of times the fluid crosses the bundle between baffles.
Propagation velocity for travel of heat radiation through vacuum is equal to the velocity of the light.
The amount of heat involved in the condensation or vaporisation of 1 kg of a fluid is the same.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Which type of heat exchanger is preferred for heavy heat loads ?
Double pipe
Plate fine
Series and parallel set of shell and tube
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Pick out the wrong statement.
Reciprocal of the resistance to heat flow is called thermal conductance.
Unit of thermal conductance is W/°K.
Thermal conductance of a wall of thickness 'L', thermal conductivity 'k' and heat flow area 'A' is kL/A.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
While the total emissivity of a perfect black body is unity, the same for a real body is
0
1
> 1
between 0 and 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers