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