HVAC Journeyman's Study Set Question and Answers

The maximum horizontal length of a single-wall connector shall be ____ percent of the height of the chimney or vent. 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 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. Flame Safeguard Fire dampers shall not be installed in. Exhaust ducts. Metallic ducts not having an approved protective coating shall be completely encased in a minimum of ___ inches of concrete 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. 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 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 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. 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 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. Wood Opening sizes in Louver, grilles, and screens protecting outdoor exhaust and air intake openings you would use which tab