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KY HVAC JOURNEYMAN EXAM QUESTIONS AND
CORRECT ANSWERS ALREADY GRADED A+ 2024
NEWEST UPATE (BRADNEW)
Fuel Oil is defined as Kerosene or any hydrocarbon oil having a flash point not less than ____: a: 150°F b: 250°F c: 225°F d: 100°F d: 100°F Refer: IMC Code - Definitions Automatic operation of the system shall not reduce the ventilation airflow rate below _____ cfm per square foot of the enclosed parking garage floor area a: 0. b: 0. c: 5 d: 50 a: 0. Refer: IMC Code 404. Ozone cabinets and ozone gas-generator rooms for systems having a maximum ozone generating capacity of 1/2 pound (0.23 kg) or more over a 24-hour period shall be mechanically ventilated at a rate of not less than ______ air changes per hour: a: 5 b: 6 c: 10 d: 12
b: 6 Refer: IMC Code 509.9. The PVC duct for domestic kitchen cooking appliances equipped with downdraft exhaust system shall extend not more than _____ above the indoor concrete floor surface: a: 1 inch b: 2 inch c: 1.5 inch d: 2.5 inch a: 1 inch Refer: IMC Code 505.1 Exp 2. The operating temperature of fire damper actuating device shall be approximately _____ above the normal temperature within the duct system a: 50°F b: 100°F c: 75°F d: 125°F a: 50°F Refer: IMC Code 607.3.3.1. The pressure classification of ducts shall equal or ______ the design pressure of the air distribution in which the ducts are utilized: a: lower than b: greater than b: greater than Refer: IMC Code 603.
Ferrous fan blades shall only be used for fans located within the ductwork and through which hazardous materials are exhausted. False True False Refer: IMC Code 502.9. Intake openings shall be located not less than 3 feet below contaminant sources where such sources are located within _____ of the opening: a: 10 feet b: 12 feet c: 14 feet d: 16 feet a: 10 feet Refer: IMC Code 401.4. As per Department of Transportation (DOT) specification cylinders with a maximum water capacity of _____ shall be used for completely self-contained hand torches and similar applications a: 2 pounds b: 1.5 pounds c: 5 pounds d: 2.5 pounds d: 2.5 pounds Refer: IMC Code 502.9.10. Venting systems shall be designed and constructed so as to develop a ______ flow adequate to convey all combustion products to the outside atmosphere: a: either positive or negative
b: negative c: positive c: positive Refer: IMC Code 801. Ducts shall be supported with approved hangers at intervals not exceeding _____ : a: 8 feet b: 12 feet c: 14 feet d: 10 feet d: 10 feet Refer: IMC Code 603. Where the vent vertical termination is located below an adjacent roof structure, the termination point of mechanical draft system shall be located at least _____ from such structure: a: 4 feet b: 6 feet c: 5 feet d: 3 feet d: 3 feet Refer: IMC Code 804.3.5. Which of the following flammable liquid having a flash point below 73°F (23°C) and a boiling point below 100°F (38°C) a: Class ID b: Class IC c: Class IB
Refer: IMC Code 502.4. The individual modular boiler shall be limited to a maximum input rating of ______ Btulh gas: a: 4,000,00 0 b: 4, c: 400, d: 40, c: 400, Refer: IMC Code - Definitions Smoke dampers are not required in corridor penetrations where the duct is constructed of steel not less than _____ in thickness and there are no openings serving the corridor: a: 0.19 inch b: 0.0019 inch c: 1.9 inch d: 0.019 inch d: 0.019 inch Refer: IMC Code 607.5.4 Exp 3 Exhaust Openings in screens, louvers and grilles terminating at outdoor shall be sized not less than ______ : a: 1/4 inch b: 1/3 inch c: 1/2 inch d: 3/4 inch a: 1/4 inch Refer: IMC Code 501.3.
Chimney connectors for low-heat appliances shall be of sheet steel pipe having diameter of 7 inches shall have minimum normal thickness of _____ that of galvanized steel: a: No. 22 b: No. 24 c: No. 26 d: No. 30 b: No. 24 Refer: IMC Code Table 803.9(1) Where ducts used for cooling are externally insulated, the insulation shall be covered with a vapor retarder having a maximum permeance of ______ perm: a: 0. b: 0. c: 5 d: 0. a: 0. Refer: IMC Code 604. Commercial kitchen Exhaust outlets that terminate above the roof shall have the discharge opening located not less than _____ above the roof surface: a: 60 inches b: 50 inches c: 25 inches d: 40 inches d: 40 inches Refer: IMC Code 506.3.13.
Chimney and vent connectors shall have a minimum clearance of _______ to electric and oil incinerators: a: 9 b: 24 c: 18 d: 36 c: 18 Refer: IMC Code Table 803.10. Ducts that operate at temperatures exceeding ______ shall have sufficient thermal insulation to limit the exposed surface temperature a: 120°F b: 150°F c: 200°F d: 250°F a: 120°F Refer: IMC Code 604. The termination point of all environmental air exhaust outlets and ducts discharging to the outdoors shall be located _____ from property lines: a: 10 feet b: 3 feet c: 6 feet d: 15 feet b: 3 feet Refer: IMC Code 501.3.
Class B Refrigerants shall have toxicity at concentrations below ______ , based on data used to determine TLV-TWA or consistent indices: a: 100 ppm b: 400 ppm c: 1000 ppm d: 200 ppm b: 400 ppm Refer: IMC Code - Definitions Where a damper is installed within a duct, a smoke detector shall be installed in the duct within _____ of the damper with no air outlets or inlets between the detector and the damper: a: 4 feet b: 3 feet c: 5 feet d: 6 feet c: 5 feet Refer: IMC Code 607.5.4.1. Mechanical and gravity outdoor air intake openings shall be located not less than _____ horizontally from any hazardous or noxious contaminant source a: 12 feet b: 16 feet c: 8 feet d: 10 feet d: 10 feet Refer: IMC Code 401.4.
Brainpower Read More Liquids having flash points at or above 100°F (38°C) and below 140°F (60°C) comes under ________ combustible liquid: a: Class I b: Class II c: Class IIIA d: Class IIIB b: Class II Where located adjacent to walkways, the vertical termination of mechanical draft systems shall be not less than ______ above the level of the walkway: a: 7 feet b: 5 feet c: 3 feet d: 4 feet a: 7 feet Refer: IMC Code 804.3.5. Commercial kitchen Grease duct systems serving a Type I hood shall be designed and installed to provide an air velocity within the duct system of not less than ______ feet per minute: a: 1000 b: 500 c: 400 d: 250 b: 500
Refer: IMC Code 506.3. The minimum openable area to the outdoors shall be ____ of the floor area being naturally ventilated: a: 6% b: 8% c: 4% d: 2% c: 4% Refer: IMC Code 504. Fire dampers are not required at penetrations of shafts where the steel exhaust subducts extend at least _______ vertically in exhaust shafts provided that there is a continuous airflow upward to the outdoors: a: 25 inches b: 22 inches c: 32 inches d: 28 inches b: 22 inches Refer: IMC Code 607.5.5 Exp 1. Underground Ducts shall have a minimum slope of _______ per foot to allow drainage to a point provided with access: a: 1/2 inch b: 1/6 inch c: 1/4 inch d: 1/8 inch d: 1/8 inch
Commercial cloth dryer ducts shall have a minimum clearance of _____ to combustible materials: a: 9 inches b: 12 inches c: 8 inches d: 6 inches d: 6 inches Refer: IMC Code 504. The vent horizontal termination point for a mechanical draft system shall not be located closer than _____ to an interior corner formed by two walls perpendicular to each other. a: 5 feet b: 6 feet c: 4 feet d: 3 feet d: 3 feet Refer: IMC Code 804.3.4. Breathing Zone region shall be more than _______ from the walls of the space or from fixed air- conditioning equipment: a: 3 feet b: 1.5 feet c: 2 feet d: 0.5 feet c: 2 feet Refer: IMC Code - Definitions
Supply air to a swimming pool and associated deck areas shall not be recirculated unless such air is dehumidified to maintain the relative humidity of the area at _____ or less: a: 40% b: 60% c: 50% d: 30% b: 60% Refer: IMC Code 403.2.1. The termination point of exhaust outlets and ducts discharging explosive or flammable vapors, fumes or dusts to the outdoors shall be located with _______ from property lines a: 18 feet b: 24 feet c: 15 feet d: 30 feet d: 30 feet Refer: IMC Code 501.3. Positive mechanical ventilation which provides a minimum of ______ complete air changes per hour shall be installed in limited spraying spaces a: six b: four c: five d: eight a: six Refer: IMC Code 502.7.
Manual dampers shall be installed in connectors except in chimney connectors serving solid fuel-burning appliances: True False False Refer: IMC Code 803. The vent vertical termination for mechanical draft system shall be located at least horizontally _____ from any portion of the roof structure: a: 2 feet b: 3 feet c: 5 feet d: 4 feet b: 3 feet Refer: IMC Code 804.3.5. For duct wrap, the installed thickness of duct insulation used to determine R-value (Thermal Resistance) shall be assumed to be ______ of nominal thickness: a: 25% b: 40% c: 75% d: 50% c: 75% Refer: IMC Code 604.7.
Mechanical ventilation shall be provided at a rate of not less than _____ cfm per square foot of floor area over the storage area: a: 2 b: 1. c: 2. d: 1 d: 1 Refer: IMC Code 502.8.1.1. Cleanouts serving horizontal sections of grease ducts shall be located not more than _____ from changes in direction that are greater than 45 degrees: a: 8 feet b: 12 feet c: 6 feet d: 10 feet d: 10 feet Refer: IMC Code 506.3.9. The cross-sectional area of a flue serving a solid-fuel-burning appliance shall be not greater than ______ times the cross-sectional area of the appliance flue collar or flue outlet: a: 2 b: 5 c: 4 d: 3 d: 3 Refer: IMC Code 801.
