In a US National Renewable Energy Laboratory study of a UPS fleet, two groups of trucks of similar age were tested. Which group emitted less particulate matter in the test?
Question and options
In a US National Renewable Energy Laboratory study of a UPS fleet, two groups of trucks of similar age were tested. Which group emitted less particulate matter in the test?
Trucks powered by diesel
Trucks powered by compressed natural gas
Both groups emitted the same amount
The study reported no particulate-matter comparison
Answer and explanation
Correct answer: B - Trucks powered by compressed natural gas
The tested trucks powered by compressed natural gas emitted about 95% less particulate matter than the diesel trucks of similar age. This is a result for the vehicles and conditions in the study.
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Uttar Pradesh Judicial Services (UP PCS-J)
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