The optimum effective temperature for human comfort is higher in winter than in

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Question
The optimum effective temperature for human comfort is
Options
A. higher in winter than in summer
B. lower in winter than in summer
C. same in winter and summer
D. not dependent on season

Correct Answer

lower in winter than in summer

Heat Transfer, Refrigeration and Air Conditioning problems

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1. The sensible heat factor during cooling and dehumidification process is given by (where h₁ = Enthalpy of air entering the cooling coil, h₂ = Enthalpy of air leaving the cooling coil, and h_A = Enthalpy of air at the end of dehumidification process)
Options
A.
B.
C.
D.

2. The formation of frost on cooling coils in a refrigerator
Options
A. increases heat transfer
B. improves C.O.P. of the system
C. increases power consumption
D. reduces power consumption

3. The by-pass factor for a cooling coil
Options
A. increases with increase in velocity of air passing through it
B. decreases with increase in velocity of air passing through it
C. remains unchanged with increase in velocity of air passing through it
D. may increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering

5. Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)
Options
A.
B.
C.
D.

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