Solar Energy

Question 1

device used to measure total (or global) solar radiation

Answer 1

Pyranometer

Question 2

device for measuring direct solar radiation

Answer 2

Pyrheliometer

Question 3

device that serves to collect solar radiant energy and transform to useful energy form; can be of flat plate type or focusing type

Answer 3

Solar collector

Question 4

device used to convert solar radiation directly into electricity; most common type is the single crystal silicon solar cell

Answer 4

Photovoltaic cell

Question 5

oldest energy source whose first practical application is drying

Answer 5

Solar energy

Question 6

amount of solar energy received per unit time on a unit area of surface perpendicular to the radiation at the outer limit of the atmosphere

Answer 6

Solar constant

Question 7

Average solar constant

Answer 7

1370 W/m^2

Question 8

Inclination of Earth

Answer 8

23.45 degrees

Question 9

Philippines is located ____ above the equator.

Answer 9

14 degrees

Question 10

Any atmospheric condition reducing transparency to radiation especially to its visible portion

Answer 10

Atmospheric turbidity

Question 11

Percentage of solar radiation absorbed at Earth surface

Answer 11

51%

Question 12

Solar constant ranges from ____ to ____

Answer 12

1350 W/m^2 to 1380 W/m^2

Question 13

Percentage of solar radiation radiated back to the atmosphere

Answer 13

19%

Question 14

Sun is farthest from the earth

152 100 000 km

Answer 14

Aphelion

Question 15

Sun nearest the earth

147 300 000 km

Answer 15

Perihelion

Question 16

Equal hours of night time and day time

Answer 16

Equinox

Question 17

Either longer day time or night time

Answer 17

Solstice

Question 18

Radiation not being scattered

Answer 18

Beam

Direct Solar Radiation

Question 19

Radiation changed/ scattered

Solar sky radiation

Answer 19

Diffuse radiation

Question 20

Global solar radiation

Answer 20

Total Solar Radiation

Question 21

Medium of heating for solar collector

Answer 21

Flat panels

Question 22

Factors affecting atmospheric turbidity

Answer 22

Dust
Pollen
Water vapor
Suspended materials

Question 23

Advantages of solar energy in agriculture

Answer 23

Solar energy is free
Prevents global warming (production phase)
Cheaper than fossil fuel
Can be use for a long time (20 years)
Can be stored
Effective solution to drought-related problems

Question 24

Disadvantages of solar energy

Answer 24

Location restrictions
High initial investment
Potential hazard upon disposal
Expensive energy storage
No power generation during nightime
Large area requirement for installation