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The heat is transferred in the direction of decreasing temperature is a statement...

Q.  
The heat is transferred in the direction of decreasing temperature is a statement of


Answer & Explanation

As per second second law, Spontaneous processes in nature occurs only in one direction. Heat always flows from body at higher temperature to body at lower temperature.

Thus correct option is: B.

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More Questions Heat and Mass Transfer:

Q.  
If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is 'hl' then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length

A. ha= hl

B. ha= 2hl

C. ha= 0.5hl

D. ha= 0.75hl


Answer & Explanation

Q.  
For an ideal black body

A. Absorptivity =1

B. Reflectivity =1

C. Emissivity = 0

D. Transmitivity =1


Answer & Explanation

Q.  
Nusselt number for full developed, laminar, constant property flow in a pipe at uniform heat flux is

A. 0.72

B. 4.364

C. 18

D. 83


Answer & Explanation

Q.  
Which of the following is concerned with both heat and mass transfer

A. Lewis relationship

B. Nusselt number

C. Kutateladze number

D. Froude number


Answer & Explanation
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