Sun radiates energy to the earth
A.in the form of electromagnetic radiation
B.at a relatively constant rate of 3.83 x 1026 W
C.24 hours per day 365 day of the year
D.all of the above
Category: Renewable Sources of Energy Mcqs
Suppose that we have an ideal piece of glass with ? = 0. If ? = 0.09 where ? = transmissivity ? = reflectivity and ? = absorptivity
A.? = 0.09
B.? = 1
C.? + ? = 1
D.? + ? = 0
Which of the following is used as working fluid in solar Rankine cycle?
A.Steam
B.Air
C.Hydrogen
D.Helium
Which of the following is scattered the most by air molecules? Waves with a wavelength of
A.0.5 micron
B.0.6 micron
C.0.7 micron
D.0.8 micron
Sail type windmill has
A.two blades
B.three blades
C.four blades
D.five blades
The function of a windmill is to extract energy from the wind and to produce
A.mechanical energy
B.thermal energy
C.electrical energy
D.chemical energy
If ?1 and ?2 are the wavelengths at the point of maximum intensity of a blackbody spectrum for a system at a temperature of 3000 K and 6000 K then
A.?1 = 2?2
B.?2 = 2?1
C.?1 = ?2
D.2727?1 = 5727?2
Solar pond is a body of saline water in which the salt concentration
A.increases from the top surface to the bottom surface
B.decreases from the top surface to the bottom surface
C.remains the same in the whole pond
D.none of the above
A difference of temperature between the two junctions of a thermocouple will produce
A.a flow of holes
B.a voltage difference between the two junctions
C.melting of wires
D.no measureable effect
