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Sun Energy Quiz
Is it possible to meet all the energy needs of a household with sunlight alone?
a) It depends on the location
c) Oil is the only dependable energy resourse.
d) It depends on the household energy demands.
e) YES, but using a backup heating and DHW system in conjunction with solar applications is generally more cost effective
Passive solar heated houses are always pracrical in a cold climates with limited sunlight?
How are solar panels different than solar collectors?
a) Solar panels harvest sunlight energy in the form of electrical power.
b) Home made solar collectors are generally more practical than home made photovoltaic panels.
c) PV panels harvest more energy per sq ft than solar collectors.
d) Solar collectors harvest the sun's energy in the form of heat.
If there were no atmosphere to block the sun's radiation how much sunlight energy would fall on one square meter in an hour
b) 2000 BTU's
c) 10 gigawatts
d) It would depend on where you stand
e) nobody knows
How much is sunlight worth?
a) It depends on how it's used
b) It's imposible to estimate since sunlight energy varies from day to day and from place to place
c) At a PV panel efficiency of 20% a 1 sq meter panel could harvest about two cents worth of electric energy in an hour
d) Sunlight is one of those things that has no price tag. It's worth whatever a person thinks it's worth.
Why are solar energy applications so expensive?
a) Because anything that's new is expensive
b) Competition is minimal
c) Solar home builders have to pay excessive fees for archetual designs that are not mainstream.
d) because oil is expensive
e) Building department regulations make it excessively difficult and expensive to install a home made solar hot water system.
How much energy is available from sunlight?
a) The earths atmosphere filters out about 30% of the sunlight energy.
b) More sunlight energy strikes the surface of the earth in one day than the energy contained in our remaining oil reserves
c) one kilo watt per square foot.
d) On a sunny day in mainland USA the heat energy available to a square foot of real estate is between 200 and 300 BTU's
e) Every seconEvery second our sun produces 5,000,000 tons of pure energy in the form of gama rays.
Are passive thermosyphoning systems more practical than active solar hot water heating sysyems?
a) Since no external power is consumed it the process of collecting solar heat passive systems are better than active systems.
b) Passive solar heatings systems are most practical in cold climates with limited sunlight
c) Active systems use mechanical pumps and fans to collect solar heat, BUT the electrical energy consumed to harvest solar heat is minimal.
d) A solar heating system that uses PV power for pumps and fans is called a hybrid system.
How many politicians does it take to screw up an economy
e) One if it's done right...
Why should the area used to collect solar heat be isolated from the area for storing heat?
a) To keep heavy tanks off a roof.
b) To minimize the possibility of leaks.
c) To minimize heat loss and to save heat for times when it's needed most.
d) Complex solar heating systems were designed to make plumbers rich.
e) Ask your local politician.
Why have drainback systems become more popular in the last few years?
a) Because drainback systems take less space than closed loop systems
b) Because drainback pumps consume less power than closed loop pumps
c) Because the power requirements of a drainback pump is not much greater than the power consumption of a circulator once water starts draining back.
d) Because glycol and pressure reliefe valves and degassers and fill purge valves are not used in drainback systems.
e) Because solar heated water flows directly into an open storage tank and a heat exchange tube is not required to bring heat into a storage tank
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