A.99
B.85
C.95
D.30
Related Mcqs:
- When solar radiation strikes the boundary between the air and top of the cover plate the percent of the incident intensity reflected is
- If the wind is blowing with a 10 kilometer per hour the dominant heat loss mechanism(s) between the top cover plate of flat-plate solar collector and the ambient air is / are
- 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.
- The radiative heat loss between the top cover of flat-plate solar collector at a temperature of Tp(K) and ambient air at a temperature of Ta(K) is proportional to
- Which of the following statements about using water as a heat-exchange fluid in flat-plate collectors is not true?
- The efficiency of a flat-plate solar collector using water as a heat-exchange fluid is largest at which of the following temperature for the absorber plate? Assume Ta = 25?C.
- Evacuated flat-plate collectors are better than non-evacuated ones at high operating temperatures because
- The incoming short-wave solar radiation is balanced by an equal amount of long wave radiation from Earth going back to space. This is known as:
- A soil absorbs about _____ of incoming solar radiation:
- Glass is the most favoured material for the transparent covers to be used in flat-plate collectors. The usual practice is to have 1 or 2 covers with spacings in the range of
