Question 1

One can increase the insolation upon a one ft2 horizontal plate by ________.

Accepted Answer

A)   using a fresnel lens of one ft2
B)   using two 1 ft2 fresnel lenses, one on top of the other
C)   adding reflectors around the plate
D)   increasing the temperature of the plate
E)   increasing the absorption of the plate C

Question 2

The optimum angle of tilt (from the horizontal) for a flat plate collector at 35$\degree$ N latitude for the purpose of space heating is ________.

Accepted Answer

A)   0 °\degree° 
B)   25 °\degree° 
C)   35 °\degree° 
D)   45 °\degree° 
E)   75 °\degree° D

Question 3

Water circulates in a thermosiphon, hot water system because ________.

Accepted Answer

A)   a pump is used
B)   gravity causes water to flow from the top of the collector to the bottom
C)   hot water is less dense than cold water
D)   solar energy is used to run the circulating pump C

Question 4

One advantage of using air as the working fluid in a solar collector is ________.

Accepted Answer

A)   that freezing will not be a problem
B)   that water heats up faster than air
C)   a smaller storage facility can be used
D)   that one needs hot water for showers

Question 5

The measure of the position of the sun from the horizontal is called the ________.

Accepted Answer

A)   altitude
B)   azimuth
C)   declination
D)   insolation

Question 6

A Trombe wall in a house uses a large window and ______.

Accepted Answer

A)   R-19 insulation in the walls
B)   a vertical thermal mass across the room from the window
C)   a vertical thermal mass close to the window
D)   a slate floor by the window
E)   a vertical flat plate collector using water

Question 7

During which season will more insolation be delivered to a vertical south-facing window on
A clear day?

Accepted Answer

A)   winter
B)   fall
C)   spring
D)   summer
E)   depends upon the R-value

Question 8

Solar energy is quite compatible for a major part of the U.S. because our major energy needs are
For ________ energy.

Accepted Answer

A)   electrical
B)   thermal
C)   kinetic
D)   potential
E)   mechanical

Question 9

If the insolation upon a flat plate collector is 800 Btu/ft2/day, how large must the collector be to provide 30,000 Btu/hr of thermal energy for an entire day? Take the efficiency of the collector
To be 50%.

Accepted Answer

A)   150
B)   750
C)   1800
D)   4000
E)   7200 ft2

Question 10

An effective way to passively cool a house is to _______.

Accepted Answer

A)   open all the windows
B)   use a light colored roofing material
C)   use concentrating collectors to provide air conditioning
D)   add more insulation on the south side of the house
E)   use thermal storage mass

Question 11

Commonly used units for solar energy input are

Accepted Answer

A)   watts
B)   watts/day
C)   watts/day/m2
D)   Btu
E)   Btu/ft2/day

Question 12

The use of thermal mass on a direct gain passive solar system _______.

Accepted Answer

A)   reduces temperature fluctuations during the day.
B)   provides foundation support for the collector superstructure
C)   increases the insolation on the south-facing windows
D)   increases temperature fluctuations during the night

Exam 4: Solar Energy

One can increase the insolation upon a one ft2 horizontal plate by ________.

The optimum angle of tilt (from the horizontal) for a flat plate collector at 35 $\degree$ N latitude for the purpose of space heating is ________.

Water circulates in a thermosiphon, hot water system because ________.

One advantage of using air as the working fluid in a solar collector is ________.

The measure of the position of the sun from the horizontal is called the ________.

A Trombe wall in a house uses a large window and ______.

During which season will more insolation be delivered to a vertical south-facing window on A clear day?

Solar energy is quite compatible for a major part of the U.S. because our major energy needs are For ________ energy.

If the insolation upon a flat plate collector is 800 Btu/ft2/day, how large must the collector be to provide 30,000 Btu/hr of thermal energy for an entire day? Take the efficiency of the collector To be 50%.

An effective way to passively cool a house is to _______.

Commonly used units for solar energy input are

The use of thermal mass on a direct gain passive solar system _______.

Exam 4: Solar Energy

One can increase the insolation upon a one ft2 horizontal plate by ________.

The optimum angle of tilt (from the horizontal) for a flat plate collector at 35 °\degree° N latitude for the purpose of space heating is ________.

Water circulates in a thermosiphon, hot water system because ________.

One advantage of using air as the working fluid in a solar collector is ________.

The measure of the position of the sun from the horizontal is called the ________.

A Trombe wall in a house uses a large window and ______.

During which season will more insolation be delivered to a vertical south-facing window on A clear day?

Solar energy is quite compatible for a major part of the U.S. because our major energy needs are For ________ energy.

If the insolation upon a flat plate collector is 800 Btu/ft2/day, how large must the collector be to provide 30,000 Btu/hr of thermal energy for an entire day? Take the efficiency of the collector To be 50%.

An effective way to passively cool a house is to _______.

Commonly used units for solar energy input are

The use of thermal mass on a direct gain passive solar system _______.

The optimum angle of tilt (from the horizontal) for a flat plate collector at 35 $\degree$ N latitude for the purpose of space heating is ________.