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When a round flue is used for the lining of a fireplace chimney the proper fireplace opening to flue size ratio should be 12:1 When unlined the smoke chamber walls shall be what thickness 8" When the opening of the firebox is 6 square feet the extension of the hearth should be 20 inches T or F the inner surfaces of the smoke chamber shall not be inclined more than 45 degrees from vertical True A level 2 inspection inspection of accessible areas of attics basements and crawlspaces True The purpose of a heat reclaimer is to Extract heat from the flue gases What best describes the allowable free air space around a flue tile 1/4 inch to 4 inch Crickets are recommended whenever the chimney is 30" wide The maximum allowable slope of an offset in a verticle flue is 30 degrees The area of the spark arrestor must not be less than three times the net free area of the chimney flue True What is the minimum thickness of a wythe 4 inches nominal chimney liners are listed to what standard UL 1777 NFPA 211 recommends annual cleaning of chimneys fireplaces and vents False The horizontal length of a single wall connector to a natural drat chimney or vent serving a single appliance shall be not more than ______ of the height of the vertical height of the chimney 75 % The effective area of a connector for a single appliance shall be ______ the area of the appliance flue collar atleast 50% Cleanout openings shall be prvided in all chimney flues serving free standing appliances True What species causes anaphylactic shock? Bees A type 3 ladder is rated for 200 lbs what are the stages of wood burning drying pyrolysis charcoaling The volume of gases which actually pass through the system as a result of draft is Flow Rectangular flues with aspect ratios greater than 2 to 1 shall be sized at least ______ of the fireplace opening 1:8 single wall connector clearance for an unlisted gas appliance with a draft hood is a level ______ inspection is done with ladders and common hand tools 2 Draft is the force or pressure difference between the inside and the outside of the venting system true NFPA 211 recommends chimney flues should be inspected Annually Two major factors that affect draft are temperature differential and chimney height what are factors of combustion efficiency time turbulence and temperature rabies is not carried by Birds what species carries histoplasmosis Birds what animal is known for roundworm raccoons what is NOT a step of a sweep turn all gas appliances off What is the proper class fire extinguisher for flammable liquids grease and oil Class B T or F - the area of a fireplace chimney flue cannot be greater than twice the area of the wood stove appliance outlet on an exterior chimney True a 24 gauge sheet metal panel with 1 inch airspace will reduce clearance to combustibles by ____ when used as a wall protector 66% ??? According to NFPA 211 solid fuel burning appliances can be install in a garage Fuel air and heat are required components of what combustion The maximum width for a type 1 industrial grade ladder rating is 250 pounds where the trim of a mantel extends up to an 1 1/2 inch clearance to combustibles from the firebox opening should be at least 6 inches there must be _______ inches of masonry between a wall thimble an combustible material 12 smoke pipe diameter 6 through 10 inches has a required gauge of 24 gauge T or F - single wall chimneys on the exterior of a home can only be used for oil or gas Flase ONly allowable vent to be used in a stud cavity of a wall BW Vent A single wall connector used for oil and solid fuel appliances requires at least _____ inches of clearance to combustible material 18 T or F - A type L vent is used for low temp oil appliances and gas appliances True Unlisted appliances with legs providing 6 inches or more of ventilation under the appliance require what type of hearth connector pipe of thimble should extend into the chimney how far flush with the interior flue wall how many screws for connector pipe 3 the formula for determining the cross sectional area of a square or rectangular flue is? two major factors influence the mount of draft what are they temperature difference the outside and flue gas temp and the height of the chimney The height of the smoke chamber should be no taller than connectors should maintain a pitch or rise of _______ per foot of horizontal length of pipe from the appliance to the chimney or vent 1/4 inch Thermal shock can be caused by a sudden rise or drastic drop in temperature T or F Vent and chimney connectors shall not be covered with insulation True Btus per cubic foot of gas 2500 Sensible heat is heat that you can feel T or F latent heat is heat you can feel False Natural gas has how many BTU per cubic foot of gas 1000 Propane gas has how many BTU per cubic foot of gas 2500 creosote is a carcinogenic