A) To generate electricity B) To heat water for showers C) To purify water using sunlight D) To cool water in hot climates
A) Aluminum foil B) Glass or clear plastic sheeting C) Wood D) Cardboard
A) To collect the condensed water B) To heat the contaminated water C) To provide structural support D) To block sunlight
A) Black B) Silver C) Clear D) White
A) Chemical energy B) Solar energy C) Electrical energy D) Mechanical energy
A) Reverse osmosis B) Filtration C) Evaporation and condensation D) Chemical reaction
A) Contaminated or brackish water B) Distilled water C) Deionized water D) Clean drinking water
A) To allow for ventilation B) To attract more sunlight C) To prevent water vapor from escaping D) To reduce condensation
A) Parallel to the ground B) At a 45-degree angle C) Any angle is sufficient D) Perpendicular to the sun's rays
A) Handle with care to avoid breakage B) Wear sunscreen C) No precautions are necessary D) Use a magnifying glass to focus sunlight
A) A larger surface area for evaporation B) Using cold water C) Using reflective materials inside the still D) A smaller surface area for evaporation
A) Mirrored surface B) White cloth C) Dark-colored plastic or metal D) Clear glass
A) Land degradation B) Depletion of water resources C) Reduced reliance on fossil fuels for water purification D) Increased carbon emissions
A) 10-20 liters per square meter B) Less than 0.1 liter per square meter C) 1-3 liters per square meter D) 50-100 liters per square meter
A) To collect more water B) To increase humidity inside the still C) To prevent algae growth D) To maintain transparency and sunlight penetration
A) Cold and cloudy climates B) Polar climates C) Sunny and warm climates D) Humid and rainy climates
A) Salts, bacteria, and heavy metals B) Viruses C) Radioactive isotopes D) Dissolved gases
A) Traps heat inside the still. B) Facilitates the flow of condensed water to the collection trough. C) Reflects sunlight away from the still. D) Provides structural support to the still.
A) A basin B) A collection trough C) A water pump D) A transparent cover
A) To absorb more solar radiation and heat up the water faster B) To prevent algae growth C) To make the still more aesthetically pleasing D) To reflect sunlight and keep the water cool
A) By boiling the water and collecting the steam B) By chemically treating the water C) By evaporating the water and leaving the contaminants behind D) By filtering the water through a membrane
A) No maintenance is required B) Daily draining and refilling of the basin C) Regular cleaning and occasional replacement of the transparent cover D) Annual lubrication of moving parts
A) To allow for temperature regulation B) Ventilation is always necessary for optimal performance. C) To prevent water vapor from escaping and reduce condensation efficiency D) To prevent the buildup of pressure
A) Size has no impact on output B) Larger stills are less efficient due to heat loss C) Larger solar stills generally produce more purified water D) Smaller solar stills are always more efficient
A) Higher temperatures always damage the components. B) Ambient temperature has no effect on performance C) Higher ambient temperatures generally increase the rate of evaporation D) Lower ambient temperatures are always preferable
A) High operating costs B) Relatively low output compared to other water purification methods C) Complex construction requirements D) Risk of explosion
A) The air temperature B) The water level shouldn't be too high, as this can reduce the surface area available for evaporation. C) The sun's strength D) The size of the water container
A) To increase its purity further B) To improve its taste C) To reduce its temperature D) To prevent recontamination
A) Access to direct sunlight B) Protection from wind C) A level surface D) Proximity to a water source
A) Plastic sheeting is a better insulator than glass. B) Plastic sheeting is more transparent than glass. C) Plastic sheeting is always cheaper than glass. D) Plastic sheeting is generally more durable and less prone to breakage. |