Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

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