Official CSIA CDET Exam Study Guide 2025-2026, Exams of Engineering

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Official CSIA CDET Exam Study Guide 2025 - 2026

What is a corbel?- ANSWER-masonry projecting upward and outward from a wall or chimney Acricket is designed to. .- ANSWER-redirect water and snow away from the chimney What is a wythe? - ANSWER-A course of brick separating flues within a chimney When a round flue is used for the lining of a fireplace chimney the proper fireplace opening to flue size ratio should be? - ANSWER-12:1 Where unlined the smoke chamber walls shall be what thickness? - ANSWER-8" When the opening of the fireplace is 6 square feet the extension of the hearth should be ?- ANSWER-20 inches The inner surfaces of the smoke chamber shall not be inclined more than 45 degrees from 2 ?- ANSWER-Truc vertical: Lrue or Lal: A level II inspection includes inspection of accessible arcas of attics, bascments,and crawlspaces: true or false? - ANSWER-True The purpose of a heat reclaimer is to _. °_ ANSWER-extract heat from the flue gases. What ANSWER best describes the allowable free air space around a flue tile?- ANSWER-1/2" to 4 Crickets are recommended whenever the chimney is wide or more. - ANSWER-30" The maximum allowable slope of an offset in a vertical flue is .- ANSWER-30 degrees The net area of the spark arrestor must not be less than three times the net free area if the chimney flue: true or false? - ANSWER-True What is the minimum thickness of a wythe? - ANSWE-Four inches nominal Chimney liners are listed to whal. standard? - ANSWERUL 1777 NFPA 211 recommends annual cleaning of chimneys, fireplaces, and vents: Lrue or false? - ANSWERFalse The horizontal length of a single-wall connector to a natural draft chimney or vent serving a single appliance shall be not more than _, __ of the height of the vertical height of the chimney. - ANSWER-75% The effective area of a connector for a single appliance shall be _____ the area of the appliance flue collar. - ANSWER-not less than Draft is .- ANSWER-the pressure difference between the inside and the outside of the venting system NFPA 211 recommends chimney flues should be inspected and. .- ANSWER-annually, upon a real estate transfer Two major factors that effect draft are and temperature differential and chimney height Which of the following is not a factor of combustion efficiency? - ANSWEF-(time, wind speed, turbulence, temperature} ANSWER wind speed __.- ANSWER-birds Rabies is not carried by Which species carries histoplasmosis? - ANSWERbirds Which animal is known for roundworm?- ANSWEFR-raccoons Of the following, which is NOT a step of a sweep? Inspecting Turn all gas appliances to off position Customer Review Inside Preparation - ANSWER-Tim all gas appliances to off position .- ANSWER. What is the proper class for an fire extinguisher that is used for flammable liquids,grease,and oil. - ANSWER-Class B The area of a fireplace chimney flue cannot be greater than twice the area of the woodstove appliance outlet on an exterior chimney: true or false? - ANSWER-True Cleaning the smoke shelf is not always necessary, unless there is a fireplace insert installed: true or false? - ANSWER-False A 24 gauge sheet metal panel with l-inch airspace will reduce clearance to combustibles by(when used as a wall protector) -.- ANSWER-66% According to NFPA 211, solid fuelburning appliances can be installed in a garage: - ANSWER- Never The maximum weight for an Type I industrial grade laddor rating is .- ANSWER-250 pounds Where the trim ofa mantel extends up to an 1 1/2", clearance to combustibles from the firebox opening should be at least ___.- ANSWER inches There must be inches of masonry between a wall thimble and combustible material. - ANSWER12 Smoke pipe diameter 6 through 10 inches has a required gauge of .- ANSWER-24 -lateral run of connector pipe and heights of chimney -temperature of flue gases and cross sectional area of flue- ANSWER-temperature difference between the outside and the flue gas temperature.chimney height The height of the smoke chamber should be no taller than .- ANSWER-width of fireplace opening Connectors shall maintain a pitch or rise of inch per foot of horizontal length of pipe from the appliance to the chimney or vent. - ANSWER-1/4 Thermal shock can be caused from .- ANSWER-a sudden rise in temperature or drastic reduction in temperature Vent and chimney connectors shall not be covered with insulation. - ANSWER-True Where constructed of standard brick without a firebrick liner, the smoke chamber wall thickness shall not be less than ___.- ANSWER inches Woodwork such as mantels and other combustible material can be placed within 4 inches of fireplace opening: true or false? - ANSWER-Falsc If the fireplace opening of a fireplace is less than 6 square feet the minimum hearth requirements would be .- ANSWER-8" to each side of the opening and 16” in front of opening For a fireplace opening 38" wide and 27" high, the hearth should extend. inches in front of the fireplace and____inches to each side of the fireplace opening. - ANSWER-20, 12 A 26 gauge thick smoke pipe should be used for a pipe diameter of ___.- ANSWERless than 6 inches Any residential chimney must terminate through the roofline at least above the point the pass through the roof. - ANSWER-3 feet. Combustible materials must be spaced from the back wall of a masonry fireplace. - ANSWER inches The smoke chamber depth should not exceed .- ANSWER-? Minimum air space allowed between the flue lining and the interior masonry wall is .- ANSWER-not less than 1/2 inch The lintel prov ides a transition from the smoke chamber to the flue lining: true or false? - ANSWER-Falsc Wood burns in three identifiable stages. Which is the second slage? - ANSWER-pyrolysis The color code for a type 1 ladder is blue: true or false? - ANSWER-True When walking on a roof you should walk .- ANSWER near the ridges and valleys OSHA states that a proper ladder angle or slope is _- ANSWER tol The area of a 8" round pipe is approximately ___.- ANSWER-A0 Square inches A draft hood should be installed on a woodstove when: -the manufactures instructions cannot be found -when draft is needed to be increased -if there is negative pressure in the room -none of the above - ANSWER-none of the above Single wall connectors less than or equal to whal diameter will be permitted to pass Lhrough a partition or wall: 6 -10 8 -none of the above - ANSWER-none of the above Square chimney flues shall have a minimum cross-sectional area of at least __ the area of the fireplace opening. - ANSWER-1/10th Wood stove ith pedestals providing 2 to 6 inches of ventilated open air space may be placed over combustible floors if .- ANSWER-the floor is protected with not less than 4 inches of masonry covered wilh 24 gauge shee! metal An crior masonry chimney must have a leasl how many inches of clearance to a combustible ANSWER-1 inch Unless a wood buming appliance is listed otherwise the floor protection should extend at least ____ inches on all sides of the appliance. - ANSWER-18 A Form of draft that is created in house because of the differential temp between the inside of the home is an example of which of the following conditions? -wind induced downdraft problem -stack effect -dynamic wind loading -draft - ANSWER-stack effect Draft is measured in .- ANSWER- inches of water column What book or manual should you use as a guide for the installation of a factory-built fireplace? - ANSWER-The fireplace installation instructions The clearance to combustibles for an exterior masonry chimney is °_ ANSWER-1 The Clearance to combustibles for an interior masonry chimney is .- ANSWER2 Unlisted decorative shrouds are allowed on zero clearance fireplaces: true or false? - ANSWER- false 3 1/2" thick masonry wall without ventilated air space allows you to reduce clearances by how much? - ANSWER-33% According to the International Residential Code, where there is no firebrick lining in the firebox the thickness of back and side walls shall be not less than .- ANSWER-10" What is the formula to determine the area of a circle? - ANSWER-Radius X Radius X 3.14 24 gauge sheet metal is thinner than 26 gauge metal true or false?- ANSWER-False When inspecting clearance reduction systems, all clearances shall be measured from the outer surface of the connector or appliance to .- ANSWER+the combustible material A 24 gauge sheet metal panel with l-inch airspace will reduce clearance to combustibles by when used as a ceiling protector. - ANSWER-a0% Ahorizontal connector pipe 4 feet long must rise, between the appliance and chimney. - ANSWER inch operated dampers shall not be placed in chimneys, vents or connectors of stoker- ired, liquid or gas - burning appliances. - ANSWER Manually For information on concerning {he usc and installation of drali. hoads, refer 1a: -The National Fuel Gas Code -The NFGC -The NFPA a4 -All of the above,bocause they all refer Lo the same document - ANSWEFR-AI of the above, because they all refer to the same document Steel fireplace units incorporating a firebox liner of not less than____ thick steel and an air chamber shall be installed with masonry to provide a total thickness at the back and side of not le ANSWER-1/4 inch,8 inc. 3 than snot less than__. of which shall be solid masonry. inches The clearance between the outside surface of the sidewall of a masonry fireplace and combustible material shall be not less than- ANSWER-2 inches When the fireplace opening is greater than 6 square feet, the hearth must extend in front of the fireplace opening, and ___ to each side of the fireplace opening. - ANSWER-20 inches, 12 inches A3 1/2 inch thick brick wall protection system installed with a 1- inch airspace will reduce clearance to combustibles material by .- ANSWER-66% When used with an unlisted freestanding woodstove, the clearance between the combustible wall and the woadstove should be when the wall is protected by a 3 1/2" brick wall wilh a1" airspace. - ANSWER-12 inches According to NFPA 211, chimneys should be inspected .- ANSWER-year Checking the basic appliance installation and connection is part of a inspection. - ANSWERLevel I Checking the size and suitability of flues for the connected appliances is part of a inspection. - ANSWER-Level II Checking the appliance and connector clearance is part of a inspection. - ANSWER- Level I Checking the expansion joint between the flue tile and the wash is part of a inspection . - ANSWEF-Level II Cordwood fuel produces approximately Of heat per pound. - ANSWER-8600 BTU "s A heat exchanger is .- ANSWER-An area in the appliance where heat is transferred to air or water A combustion chamber is __ ___.- ANSWER-An area in the appliance tis produced A is a fixed metal plate between the firebox and stove flue collar designed to increase combustion efficiency by slowing the passage of smoke. - ANSWEF-baffle When the furnace blower is located on the return side of the furnace it will create pressure around the furnace exchanger. - ANSWER-Positive Horizontal seclions of connector pipe should be installed with the scams on the .- ANSWER-Lap Abarometric damper draft. - ANSWER-reduces TF a ladder is used to reach a roof line that is 16 feet high, the base of the ladder should be _ from the building. - ANSWER4 feet Hypothermia is a potential hazard for chimney technicians. It is caused by .- ANSWER-Exposure to cold Raising the height of the chimney .- ANSWER Increases draft. The customer thinks their chimney was damaged during a recent hurricane. You should recommend which level of inspection? - ANSWEFR-Level 2 To help establish draft in a cold chimney when lighting the fire you could .- ANSWER-Hold a buming newspaper wand up in the damper Video scanning the chimney is a required part of a Level 1 inspection: true or false? - ANSWER- False Which organization regulates woodstoves & fireplaces in mobile homes? - ANSWER-HUD The best shoes for walking on rools are .- ANSWER Sneakers or boots with crepe or gum soles Creosote is .- ANSWERCarcinogenic How do you reset a stack control on an oil fired appliance? - ANSWERPull the lever out of 1/4 of an inch, then release slowly Backpulfing is described as .- ANSWER-Smoke coming into the room in short sharp bursts Sensible heat is heat that you can feel: true or false? - ANSWER-True Latent heat is heat that you can feel: true or false? - ANSWER-False