Engineering :: Heat Transfer
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171. |
Steam traps are used to |
A. |
Regulate the flow |
B. |
Balance the pressure |
C. |
Remove condensate |
D. |
Add moisture |
E. |
Heat steam |
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Answer: Option C
Explanation:
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172. |
Dropwise condensation occurs on a |
A. |
Glazed surface |
B. |
Smooth surface |
C. |
Oily surface |
D. |
Coated surface |
E. |
None of the above |
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Answer: Option C
Explanation:
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173. |
Agitated film evaporator is suitable for concentrating |
A. |
Low temperature liquids |
B. |
Liquid metal |
C. |
Viscous liquids |
D. |
Corrosive liquids |
E. |
Insulating liquids |
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Answer: Option C
Explanation:
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174. |
Ditus Boelter equation is applicable in case of fluids flowing in |
A. |
Laminar region |
B. |
Turbulent region |
C. |
Transition region |
D. |
Any of the above |
E. |
None of the above |
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Answer: Option B
Explanation:
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175. |
In sugar mills cane juice is evaporated in |
A. |
Horizontal tube evaporators |
B. |
Long vertical tube evaporators |
C. |
Short vertical tube evaporators |
D. |
Zig-zag tube evaporator |
E. |
Flash evaporator |
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Answer: Option B
Explanation:
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176. |
Which evaporator is preferred for concentrating the fruit juice? |
A. |
Long vertical tube evaporator |
B. |
Short vertical tube evaporator |
C. |
Agitated film evaporator |
D. |
Zig-zag film evaporator |
E. |
Falling film evaporator |
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Answer: Option E
Explanation:
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177. |
The material preferred for the fabrication of fruit juice concentrator is |
A. |
Cast iron |
B. |
Mild steel sheet |
C. |
Stainless steel sheet |
D. |
Copper |
E. |
Brass |
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Answer: Option C
Explanation:
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178. |
Baffles are provided in heat exchangers to |
A. |
Remove dirt |
B. |
Increase heat transfer rate |
C. |
Provide better mechanical strength |
D. |
Reduce heat transfer rate |
E. |
Reduce vibrations |
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Answer: Option B
Explanation:
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179. |
A 1-2 heat exchanger means |
A. |
Single pass on shell side and double pass on tube side |
B. |
Single pass on tube side and double pass on shell side |
C. |
Single liquid cools two liwuids at different temperatures |
D. |
Two tubes of cold fluid pass through one tube of hot fluid |
E. |
Two tubes of hot fluid pass through one tube of cold tube |
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Answer: Option A
Explanation:
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180. |
A correction of LMTD is necessary in case of |
A. |
Parallel flow heat exchanger |
B. |
Counter current heat exchanger |
C. |
Cross flow heat exchanger |
D. |
All of the above |
E. |
None of the above |
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Answer: Option C
Explanation:
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