Freezing point and pour point are equal for
A.water
B.crude oil
C.aviation turbine fuel
D.kerosene
Category: Renewable Sources of Energy Mcqs
Air velocity in the pipelines should be limited to about
A.2.25 m/s
B.10 m/s
C.25 m/s
D.50 m/s
Solar photovoltaic energy sources produce
A.AC electricity
B.DC electricity
C.both and a and b
D.neither a nor b
The angle in minute subtended by sun on the earths surface is about
A.23
B.32
C.53
D.43
The maximum value of the extraterrestrial solar radiation occurs at a wavelength of about
A.0.12 ?m
B.4 ?m
C.0.48 ?m
D.0.78 ?m
Compare the heat loss between the absorber plate of flat-plate collector and the cover with that between the cover and the ambient air at steady state.
A.The two heat losses are equal
B.The heat loss between the absorber plate and the cover plate is greater
C.The heat loss between the cover plate and the ambient air is greater
D.Information available is insufficient to decide
Water circulates in a thermosiphon hot-water heating system by
A.forced circulation using a pump
B.the fact that hot water is less dense than cold water
C.the fact that cold water is less dense than hot water
D.gravity flow from top of the collector to the lower storage tank
At the inversion point the Joule-Thomson coefficient is
A.zero
B.negative
C.positive
D.infinite
