HVAC Masters Test Questions and Answers Already Passed

HVAC Masters Test Questions and Answers Already Passed What is the minimum size of drier vent 4 inches Can a 2x4 studding be used for plenum or return chases or duct No Appliance in a public garage should have a minimum clearance from the floor 8 feet Duct insulation should have a smoked developed index of no more than 50 Duct insulation material should have a minimum flame spread rating of 25 What is the maximum temperature of gypsum board 125 degrees Fahrenheit What is the best practice to weld CPVC PVC solvent What is the minimum access on appliances installed below floors 30x22 What is the maximum distance of flexible pipe 14 feet What Is The Mínimum size Of supply Oil line 3/8 Pipe support hangers should not support Galvánic Action In a hydronic system steel pipe should be Supported at minimum of every 12 feet In a hydronic system with copper pipe the minimum support should be 12 feet What meter is used to measure true power Wattmeter What is the minimum distance when soldering on metal to plastic 18 inches What is the largest allowed pipe to be flared 7/8 What device is used to reduce capacity on a commercial compressor Unloaded What device separates the high and low side of the refrigeration system TXV When detecting a refrigerant leak with an electronic leak detector how fast should you tip move 1 inch per second What is the purpose of a trap on a suction line riser Assist in oil return to prevent oil accumulation in the evaporator What type of heat transfer uses electromagnetic waves Radiation What slope should the suction line piping be going to a compressor 1/2 inch per 10 feet What is the purpose of a crank case heater To Keep the compressor oil at a elevated temperature to ensure refrigerant