Renewable Energy Practice Test 3

1. Reduction of error between simulated values and the true values increases accuracy of the empirical model.

False

True

2. What is the main advantage of sunshine recorder?

It is less accurate but inexpensive

It is less accurate but extremely expensive

It is more sophisticated than pyranometers and pyrheliometers

It is more expensive than pyranometers and pyrheliometers

3. Which of the following is a reason for inverse relationship between insolation and cloud cover in sky?

Sunshine duration records are caused by sun being obstructed by opaque cloud cover

Sunshine duration records are caused by sun being obstructed by cloud cover

Sunshine duration records are caused by sunshine being transmitted through opaque cloud cover

Sunshine duration records are caused by sun being obstructed by transparent cloud cover

4. What is solar time?

A reference unit for time

Calculation of passage of time based on moon’s position in sky

Calculation of passage of time based on sun’s position in sky

A unit that measures astronomical time

5. Cloud cover estimation is free from error.

False

True

6. What is local true solar time?

Solar time on every location of earth

Solar time on the equator

Equivalent of earth’s solar time on other planets

Solar time on the Greenwich meridian

7. What is sun’s declination angle during winter solstice?

-23.5 degrees

37 degrees

25 degrees

23.5 degrees

8. The constant “k” in Angstrom-Savinov formula depends on ________

solar radiation

longitude of the location

latitude of the location

cloud opacity

9. __________ is a physical device that can be correlated to the number of photons detected.

LEDs

Photodiode

CFLs

CFCs

10. Solar time is _____ clock time in December and ____ clock time in September.

same as, same as

more, same as

more, less

less, more