14 Questions
What is the hour angle in the morning before the sun crosses the local meridian?
Positive values
How is the hour angle expressed?
In degrees
At what time would the hour angle be +15 degrees solar time?
11:00 A.M.
What does a negative hour angle indicate in the afternoon?
The sun is in the west
How is the location of the sun at any time of day described?
Altitude angle and azimuth angle
When is the azimuth angle positive?
In the morning
When is the azimuth angle negative?
In the afternoon
What factors do the azimuth and altitude angles of the sun depend on?
Latitude, day number, and time of day
How can you compute the altitude angle of the sun?
sin β = cosL cosδ cosH + sinL sin δ
What is the latitude of Montreal, Quebec?
45 degrees
What is the solar declination on the summer solstice?
23.45 degrees
How can you compute the azimuth angle of the sun?
φS = sin^{-1}(-0.9644)
What is the altitude angle of the sun at 3:00 P.M. solar time in Montreal, Quebec on the summer solstice?
47.73 degrees
What direction is the azimuth angle pointing at 3:00 P.M. solar time in Montreal, Quebec on the summer solstice?
75 degrees west of south
Test your knowledge on Wind & Solar Energy with this quiz for ESET 222 course. Questions cover topics like solar energy, solar position at any time of day, and the hour angle concept.
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