ARE 5.0 - PPD - MECHANICAL SYSTEMS Exam with 100% Correct | Latest Updated Graded A+

ARE 5.0 - PPD - MECHANICAL SYSTEMS Exam with 100% Correct | Latest Updated Graded A+ Net Zero Structure - A building that consumes only as much energy as it produces on site through renewable means Selection of Fuel Type - Depends on Fuel's availability in the region and the dependability of supply; the fuel's cost, cleanliness and convenience of storage; and the needs of the building's equipment Natural Gas - Of all the fossil fuels it is the most efficient - it is clean burning and relatively low in cost It's heat value is 10,050 Btu/gal Flammable gas, consisting largely of methane and other hydrocarbons, occurring naturally underground (often in association with petroleum) and used as fuel. Propane - A type of gas that can be used where natural gas is not available. It's heat value is 21,560 Btu/gal It is delivered and stored in pressurized tanks. Oil - Is produced in six grades. Grades with lower numbers are more refined and more expensive. It must be stored in or near the building where it is used. No. 2 is the grade most commonly used in residential and light commercial boilers. It's heat value is 137,000-141,000 Btu/gal No. 4 & 5 are the grades used in larger commercial applications. It's heat value is 146,800-152,000 Btu/gal