A) To purify water using sunlight B) To heat water for showers C) To generate electricity D) To cool water in hot climates
A) Wood B) Glass or clear plastic sheeting C) Aluminum foil D) Cardboard
A) To provide structural support B) To heat the contaminated water C) To block sunlight D) To collect the condensed water
A) Black B) White C) Silver D) Clear
A) Mechanical energy B) Electrical energy C) Solar energy D) Chemical energy
A) Chemical reaction B) Filtration C) Reverse osmosis D) Evaporation and condensation
A) Clean drinking water B) Contaminated or brackish water C) Distilled water D) Deionized water
A) To prevent water vapor from escaping B) To reduce condensation C) To attract more sunlight D) To allow for ventilation
A) At a 45-degree angle B) Parallel to the ground C) Perpendicular to the sun's rays D) Any angle is sufficient
A) Use a magnifying glass to focus sunlight B) Handle with care to avoid breakage C) Wear sunscreen D) No precautions are necessary
A) Using cold water B) A smaller surface area for evaporation C) A larger surface area for evaporation D) Using reflective materials inside the still
A) Dark-colored plastic or metal B) Clear glass C) Mirrored surface D) White cloth
A) Reduced reliance on fossil fuels for water purification B) Land degradation C) Increased carbon emissions D) Depletion of water resources
A) 10-20 liters per square meter B) 50-100 liters per square meter C) Less than 0.1 liter per square meter D) 1-3 liters per square meter
A) To prevent algae growth B) To collect more water C) To maintain transparency and sunlight penetration D) To increase humidity inside the still
A) Polar climates B) Cold and cloudy 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) Provides structural support to the still. B) Reflects sunlight away from the still. C) Facilitates the flow of condensed water to the collection trough. D) Traps heat inside the still.
A) A water pump B) A transparent cover C) A basin D) A collection trough
A) To absorb more solar radiation and heat up the water faster B) To make the still more aesthetically pleasing C) To prevent algae growth D) To reflect sunlight and keep the water cool
A) By chemically treating the water B) By evaporating the water and leaving the contaminants behind C) By boiling the water and collecting the steam D) By filtering the water through a membrane
A) No maintenance is required B) Daily draining and refilling of the basin C) Annual lubrication of moving parts D) Regular cleaning and occasional replacement of the transparent cover
A) To prevent water vapor from escaping and reduce condensation efficiency B) To allow for temperature regulation C) To prevent the buildup of pressure D) Ventilation is always necessary for optimal performance.
A) Larger stills are less efficient due to heat loss B) Size has no impact on output C) Larger solar stills generally produce more purified water D) Smaller solar stills are always more efficient
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) Relatively low output compared to other water purification methods B) High operating costs C) Risk of explosion D) Complex construction requirements
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 prevent recontamination B) To improve its taste C) To reduce its temperature D) To increase its purity further
A) Access to direct sunlight B) Proximity to a water source C) A level surface D) Protection from wind
A) Plastic sheeting is generally more durable and less prone to breakage. B) Plastic sheeting is more transparent than glass. C) Plastic sheeting is a better insulator than glass. D) Plastic sheeting is always cheaper than glass. |