A.0.2 – 0.4 CM
B.5 – 10 cm
C.1.5 – 3 cm
D.15-20 cm
Related Mcqs:
- The percent transmission of incoming solar radiation through the top cover plate of flat-plate collectors is typically
- Which of the following statements about using water as a heat-exchange fluid in flat-plate collectors is not true?
- Which of the following passes through a maximum with increase in the number of covers (glazings) used in a flat-plate solar collector?
- Evacuated flat-plate collectors are better than non-evacuated ones at high operating temperatures because
- What is the serious problem with using a thin plastic sheet as the glazing material in a flat-plate solar collector?
- 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.
- 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.
- A jet of water of cross-sectional area 20 sq. cm impinges on a plate at an angle of 60? with a velocity of 10 m/sec. Neglecting the friction between the jet and plate (density of water 1000/9.81 kgm-1 sec2 per cubic meter), the force exerted by the jet on the plate would be in the range
- For punching a hole of 25 mm diameter in a plate 20 mm thick, if the shear stress of plate material is 30 kg/mm2, the force required would be
