Engineering :: Renewable Sources of Energy

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41.

The sum of the solar altitude angle and the solar zenith angle is

A.	90?	B.	180?
C.	0?	D.	360?

42.

Which of the following angles is aero at solar noon?

A.	Solar altitude angle	B.	Solar zenith angle
C.	Hour angle	D.	Latitude angle

43.

Which of the following angles is aero at solar sunset?

A.	Latitude angle	B.	Hour angle
C.	Solar zenith angle	D.	Solar altitude angle

44.

At solar noon on the equinoxes the solar zenith angle is equal to

A.	the latitude angle	B.	the hour angle
C.	the solar altitude angle	D.	none of the above

45.

The hour angle is an angular measure of time and is equivalent to

A.	5? per hour	B.	10? per hour
C.	15? per hour	D.	30? per hour

46.

The hour angle is

A.	measured from noon based on the local apparent time	B.	positive in the forenoon
C.	negative in the afternoon	D.	all of the above

47.

At 1400 h (local apparent time) the hour angle is

A.	30?	B.	?30?
C.	210?	D.	0?

48.

At 0900 h (local apparent time) the hour angle is

A.	15?	B.	45?
C.	?45?	D.	?15?

49.

Suppose that the transmissivity is zero for a very thick piece of material. If the material is perfectly black where ? = absorptivity and ? = reflectivity

A.	? = 0	B.	? + ? = 0
C.	? = 1	D.	? = 0

50.

Suppose that the transmissivity is zero for a very thick piece of material. If the material is perfectly white where ? = absorptivity and ? = reflectivity

A.	? = 0	B.	? = 1
C.	? = 0	D.	? + ? = 0