Hvacr - Study guides, Class notes & Summaries

A solution used as a secondary refrigerant in chillers consisting of water and a chemical which lowers the water's freezing point is called: - Brine. Air-conditioning tube-and-fin coils are commonly available as: - Slab coils, slant coils, "A" coils, and "N" coils. An evaporator in which refrigerant enters as a saturated liquid vapor mix and leaves as a superheated vapor is a: - Direct expansion evaporator. An evaporator that covers the coils being cooled with liquid refrigerant is a:...

(I) represents in equation - "intensity" 12-gauge (AWG)= 20 amps is recommended for - residential receptacle outlets. 14-gauge (AWG)= 15 amps wire be suitable for - lighting circuits. a breaker rated for 15 amps is installed into a 30 amp circuit - not enough current to flow a breaker that is rated at 30 amps installed into a 15 amp circuit - would allow too much current flow. a closed circuit is - a circuit with complete path and allows the load to function. A kilowatt is equal to - 1,...

A common rating that's used to specify the capacity of refrigeration equipment is the _______, which is equal to 12,000 BTU per hour - Ton A gas has a weight of 5 pounds and a volume of 100 cubic feet. What is the specific volume of this gas? - 20 A gauge pressure of 30 psig is equivalent to an absolute pressure of - 44.7 According to Charles's law, if the temperature of a gas is increased, then the - volume would increase An electric motor that's rated at 5 horsepower can produce ____...

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How much current is drawn by a 120V circuit containing a 1,500W load? Ans: 12.5A How much power is consumed by a 120V parallel circuit that contains a 100 load and an 80 load and draws 2.7A? Ans: 125W What characteristic do devices that use DC instead of AC power often have in common? Ans: They are battery-powered and mobile One milliamperes is equal to _____. Ans: 1/1,00 of an amp Current is measured in ______. Ans: Amperes If a load is supplied by 120V and draws 5A of current, how ...

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A grain is a small measurement of weight that is used to measure water vapor in the air. How many grains are equal to one pound? - 7,000 Area measurements are used to measure: - The size of a floor in a room. For which of the following measurements is area used? - Surfaces How many grains are in a pound? - 7,000 How many ounces equal one pound? - 16 If you have a system with a 4 gallon per minute (gpm) flow rate, how many gallons will be delivered in one hour? - 240 gallons If you need t...