Download KY HVAC JOURNEYMAN EXAM STUDY GUIDE LATEST UPDATED 2024/2025 and more Exams Engineering in PDF only on Docsity!
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Liquid adhesive coatings used on air filters for air conditioning or heating systems shall have a flash point not lower than : a: 200°F b: 250°F c: 350°F d: 325°F - ansd: 325°F Refer: IMC Code 605. Connectors shall connect to a chimney flue at a point not less than above the lowest portion of the interior of the chimney flue: a: 10 inches b: 12 inches c: 16 inches d: 14 inches - ansb: 12 inches Refer: IMC Code 801. 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 - ansb: 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 - ansa: 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 - ansb: 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%
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d: 2% - ansc: 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 - ansb: 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 - ansd: 1/8 inch Refer: IMC Code 603.8. Masonry chimney flues shall be provided with a cleanout opening having a minimum height of : a: 6 inches b: 12 inches c: 8 inches d: 10 inches - ansa: 6 inches Refer: IMC Code 801. Commercial Kitchen Exhaust equipment serving a Type I hood shall have a clearance to combustible construction of not less than : a: 30 inches b: 12 inches c: 24 inches d: 18 inches - ansd: 18 inches Refer: IMC Code 506.5. Steam-Heating Boiler operated at pressures not exceeding a: 20 psi b: 15 psi c: 10 psi d: 25 psi - ansb: 15 psi Refer: IMC Code - Definitions Commercial cloth dryer ducts shall have a minimum clearance of materials:
for steam:
to combustible
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Refer: IMC Code 502.7. The use of gypsum boards to form plenums shall be limited to systems where the air temperatures do not exceed : a: 100°F b: 125°F c: 200°F d: 150°F - ansb: 125°F Refer: IMC Code 602. The operating temperature of fire damper actuating device shall be approximately above the normal temperature within the duct system: a: 100°F b: 25°F c: 75°F d: 50°F - ansd: 50°F Refer: IMC Code 607.3.3.1. Mechanical draft system Vents shall terminate horizontally at least above any forced air inlet located within 10 feet: a: 5 feet b: 2 feet c: 3 feet d: 4 feet - ansc: 3 feet Refer: IMC Code 804.3.4. Manual dampers shall be installed in connectors except in chimney connectors serving solid fuel- burning appliances: True False - ansFalse 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 - ansb: 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%
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d: 50% - ansc: 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 - ansd: 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 - ansd: 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 - ansd: 3 Refer: IMC Code 801. Low-pressure boilers operate at pressures less than or equal to for steam: a: 15 psi b: 10 psi c: 20 psi d: 5 psi - ansa: 15 psi Refer: IMC Code - Definitions The fire damper rating (in hours) for penetration less than 3 hour fire resistance rated assemblies shall be : a: 3 hours b: 1.5 hours c: 4.5 hours d: 2 hours - ansb: 1.5 hours Refer: IMC Code - Definitions The automatic system shall be capable of producing a ventilation airflow rate of per square foot of enclosed parking garage floor area: a: 0.75 cfm
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b: 0. c: 1 d: 2 - ansc: 1 Refer: IMC Code 502.4. is the pressure difference created by a vent or chimney because of its height, and the temperature difference between the flue gases and the atmosphere: a: Natural draft b: Induced draft c: Either Natural draft or Induced draft - ansa: Natural Draft Refer: IMC Code - Definitions The design temperature of air to be conveyed in flexible air ducts and flexible air connectors shall be less than : a: 300°F b: 150°F c: 350°F d: 250°F - ansd: 250°F Refer: IMC Code 603.6. Air Intake openings shall be located a minimum of from lot lines or buildings on the same lot: a: 10 feet b: 12 feet c: 8 feet d: 16 feet - ansa: 10 feet Refer: IMC Code 401.4. Make up air duct insulation installed within of a Type I commercial kitchen hood shall be noncombustible a: 30 inches b: 18 inches c: 24 inches d: 12 inches - ansb: 18 inches Refer: IMC Code 506.3.1. The minimum thickness of the vent connector shall be gage for galvanized steel: a: No. 30 b: No. 26 c: No. 32 d: No. 28 - ansd: No. 28 Refer: IMC Code 803.
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Fire dampers are not required at penetrations of shafts where the penetrations are in parking garage exhaust or supply shafts that are separated from other building shafts by not less than hour fire-resistance-rated construction: a: 2 b: 1 c: 3 d: 2 - ansa: 2 Refer: IMC Code 607.5.5 Exp 1. The mechanical draft system vent shall vertically terminate at least below window or gravity air inlet for the building: a: 4 feet b: 3 feet c: 1.5 feet d: 5 feet - ansa: 4 feet Refer: IMC Code 804.3.5. The ventilation rate for repair garages for natural and hydrogen fueled vehicles shall be at least cubic foot per minute per 12 cubic feet of room volume: a: 1. b: 2 c: 1 d: 3 - ansc: 1 Refer: IMC Code 502.16. is the Refrigerants removed from a system in any condition without necessarily testing or processing them: a: Recovered Refrigerants b: Restored Refrigerants c: Reclaimed Refrigerants d: Reusable Refrigerants - ansa: Recovered Refrigerants Refer: IMC Code - Definitions The maximum air temperature within nonmetallic ducts shall not exceed : a: 250°F b: 150°F c: 200°F d: 300°F - ansa: 250°F Refer: IMC Code 603. 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
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b: 12 feet c: 8 feet d: 10 feet - ansd: 10 feet Refer: IMC Code 804.3. The maximum horizontal length of a single- wall connector shall be chimney or vent. a: 40% b: 50% c: 25% d: 75% - ansd: 75% Refer: IMC Code 803.10.
_ of the height of the
Smoke detectors shall be installed in return air systems with a design capacity greater than , in the return air duct or plenum upstream of any filters: a: 2,000 cfm b: 1,000 cfm c: 2,500 cfm d: 1,500 cfm - ansa: 2,000 cfm Refer: IMC Code 606.2. Ferrous fan blades shall only be used for fans located within the ductwork and through which hazardous materials are exhausted. False True - ansFalse 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 - ansa: 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 - ansd: 2.5 pounds Refer: IMC Code 502.9.10.
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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 - ansc: 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 - ansd: 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 - ansd: 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 d: Class IA - ansd: Class IA For determining all welded and brazed joints are liquid tight, a light test shall be performed by passing a lamp having a power rating not less than through the entire section of duct work to be tested. a: 100 watts b: 200 watts c: 150 watts d: 50 watts - ansa: 100 watts Refer: IMC Code 506.3.2. Oil-burning appliances listed and labeled for venting with vents: a: Type B b: Type K c: Type L d: Type A - ansc: Type L Refer: IMC Code Table 802.
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c: 5 d: 0.005 - ansa: 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 - ansd: 40 inches Refer: IMC Code 506.3.13. Gasket and sealing materials for duct to exhaust fan connections shall be rated for continuous duty at a temperature of not less than : a: 1500°F b: 2000°F c: 2500°F d: 1000°F - ansa: 1500°F Refer: IMC Code 506.3.2. The foam plastic insulation shall be covered by corrosion-resistant steel having a base metal thickness of not less than : a: 4 mm b: 0.4 mm c: 40 mm d: 0.04 mm - ansb: 0.4 mm Refer: IMC Code 602.2.1.5. Gas appliances are listed and labeled for venting with vents: a: Type C b: Type A c: Type B d: Type L - ansc: Type B Refer: IMC Code Table 802. Chimney and vent connectors shall have a minimum clearance of to electric and oil incinerators: a: 9 b: 24 c: 18 d: 36 - ansc: 18 Refer: IMC Code Table 803.10. Ducts that operate at temperatures exceeding shall have sufficient thermal insulation to limit the exposed surface temperature
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a: 120°F b: 150°F c: 200°F d: 250°F - ansa: 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 - ansb: 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 - ansb: 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 - ansc: 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 - ansd: 10 feet Refer: IMC Code 401.4. Underground commercial kitchen grease duct installation shall be completely encased in concrete with a minimum thickness of inches: a: 6 b: 2 c: 5 d: 4 - ansd: 4
