Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning
Exercise :: Heat Transfer, Refrigeration and Air Conditioning - Section 7
| 1. |
Sensible heat factor is given by (where S.H. = Sensible heat, and L.H. = Latent heat) |
Answer: Option A
Explanation:
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| 2. |
Stefan-Boltzmann law is applicable for heat transfer by convection. |
Answer: Option B
Explanation:
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| 3. |
The most commonly used method for the design of duct size is the |
| A. |
velocity reduction method | | B. |
equal friction method | | C. |
static regain method | | D. |
dual or double method |
Answer: Option C
Explanation:
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| 4. |
In counter-current flow heat exchangers |
| A. |
both the fluids at inlet are in their hottest state | | B. |
both the fluids at inlet are in their coldest state | | C. |
both the fluids at exit are in their hottest state | | D. |
one fluid is coldest and the other is hottest at inlet |
Answer: Option A
Explanation:
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| 5. |
The rate of heat flow through a body is  . The term x/kA is known as |
| A. |
thermal coefficient | | B. |
thermal resistance | | C. |
thermal conductivity | | D. |
none of these |
Answer: Option B
Explanation:
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