HVAC Journeyman's Study Set Exam Final Questions and Answers

HVAC Journeyman's Study Set Exam Final Questions and Answers The maximum horizontal length of a single-wall connector shall be ____ percent of the height of the chimney or vent. - CORRECT ANSWER-75% Grease filters shall be installed at an angle of not less that ____ degrees from the horizontal and shall be equipped with a drip tray beneath the lower edge of the filters - CORRECT ANSWER-45 A device that will automatically shut off the fuel supply to a main burner or group of burners when the means of ignition of such burners become inoperative, and when flame failure occurs on the burner or group of burners. - CORRECT ANSWER-Flame Safeguard Fire dampers shall not be installed in. - CORRECT ANSWER-Exhaust ducts. Metallic ducts not having an approved protective coating shall be completely encased in a minimum of ___ inches of concrete - CORRECT ANSWER-2 inches An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that is capable of causing excessive condensate production in the vent. - CORRECT ANSWER-Category 2 Type L shall terminate not less than two feet above the highest point of the roof penetration and not less than ______ feet higher than any portion of a building - CORRECT ANSWER-2 Feet Duct Linings shall be interrupted at the area of operation of a fire damper in at a minimum of 6 inches _____ of and 6 inches downstream of electric resistance and fuel burning heaters in a duct system - CORRECT ANSWER-Upstream A container that is placed at a low point in a system of piping to collect condensate and from which the condensate is removable. - CORRECT ANSWER-Drip leg Infrared radiant heaters shall be _____ in a position independent of fuel and electric supply lines hangers and bracket shall be non-combustible material - CORRECT ANSWER-Fixed In the absence of MFG information openings covered with metal louvers shall be deemed to have a net free area of 75% of the area of the opening, and openings covered with ____ louvers shall be deemed to have a net free area of 25% of the area of the opening. - CORRECT ANSWER-Wood Opening sizes in Louver, grilles, and screens protecting outdoor exhaust and air intake openings you would use which table? - CORRECT ANSWER-Table 401.5 A hole not greater in diameter than ____ % of the stud depth is permitted to be bored in any wood stud. - CORRECT ANSWER-40% Reclaimed refrigerants and used refrigerants shall not be reused in a different owner's equipment or appliances. Unless test and meets purity requirements of _____. - CORRECT ANSWER-ARI 700 where multiple air-handling systems share common supply or return air ducts or plenums with a combined design capacity greater than 2000 cfm, the return air systen shall be provided with. - CORRECT ANSWER-Smoke detector The length of overlap for overlapping duct joints shall not exceed ___ inches. - CORRECT ANSWER-2 inches A yellow insulated copper Tracer wire or other approved conductor shall be installed adjacent to underground non-metallic piping access shall be provided to the Tracer wire or the Tracer wire shall terminate above ground at each end of the nonmetallic piping the Tracer wire shall not be less than _____ AWG and the insulation type shall be suitable for the direct burial - CORRECT ANSWER-18 AWG Excavations are ___ feet in depth and examination of the ground shows no indication of potential cave in. - CORRECT ANSWER-5 feet An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent. - CORRECT ANSWER-Category 1 A safety valve designed to forestall the development of a dangerous condition by relieving either pressure, temperature. or vacuum in hot water supply system. - CORRECT ANSWER-Relief Valve All refrigerant containing parts and systems exceeding 100 horsepower Drive power except evaporators used for refrigeration or dehumidification; condensers used for heating control and pressure valves for either; and connecting piping, shall be located either. - CORRECT ANSWER-Outdoors or in a ma