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Q#1
GATE CH 2015
NAT
+2 marks
-0 marks
Air is flowing at a velocity of 
perpendicular to a long pipe as shown in the figure below. The outer diameter of the pipe is 
and temperature at the outside surface of the pipe is maintained at 
. The temperature of the air far from the tube is 
.
Data for air: Kinematic viscosity, 
; Thermal conductivity, 
Using the Nusselt number correlation: 
, the rate of heat loss per unit length ( 
) from the pipe to air (up to one decimal place) is 
.
.
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Browse Practice Questions by Chapters / Topics in Browse Practice Questions by Chapters / Topics in GATE Chemical Engineering
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| Topic | Questions | Attempted | Correct | |
|---|---|---|---|---|
| Heat Transfer | 26 | 0 | 0 | |
| Chemical Technology | 17 | 0 | 0 | |
| Mechanical Operations | 12 | 0 | 0 | |
| Mass Transfer | 42 | 0 | 0 | |
| Instrumentation and Process Control | 26 | 0 | 0 | |
| Fluid Mechanics | 24 | 0 | 0 | |
| Engineering Mathematics | 41 | 0 | 0 | |
| General Aptitude | 60 | 0 | 0 | |
| Chemical Reaction Engineering | 26 | 0 | 0 | |
| Process Calculation | 9 | 0 | 0 | |
| Plant Design Economics | 10 | 0 | 0 | |
| Thermodynamics | 24 | 0 | 0 |
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