Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

16.
In aqua-ammonia and Lithium-bromide water absorption refrigeration systems, the refrigerants are respectively
water and water
water and lithium bromide
ammonia and lithium bromide
ammonia and water
Answer: Option
Explanation:
No answer description is available. Let's discuss.

17.
As relative humidity decreases, the dew point temperature will be __________ wet bulb temperature.
same as
lower than
higher man
Answer: Option
Explanation:
No answer description is available. Let's discuss.

18.
The process of heat transfer from a hot body to a cold body, in a straight line, without affecting the intervening medium, is called radiation.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.

19.
Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ρ = Density of fluid, cp = Specific heat at constant pressure, and μ = Coefficient of absolute viscosity)
Answer: Option
Explanation:
No answer description is available. Let's discuss.

20.
The optimum effective temperature for human comfort is
higher in winter than in summer
lower in winter than in summer
same in winter and summer
not dependent on season
Answer: Option
Explanation:
No answer description is available. Let's discuss.