HVAC journeyman prep test EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) A listed smoke damper designed to resist the passage of smoke shall be
provided at each point in a duct or air transfer opening penetrates a:
(A)smoke barrier wall (B)fire rated wall (C)interior wall (D)corridor wall - Correct Answers ✅Corridor wall (IMC 607.5.4) Flexible air duct may be what length? (A)10' (B)2' (C)14' (D)6' - Correct Answers ✅14' (IMC 603.6.1.1) The maximum vertical distance between the front lower lip of a canopy Type
1 hood and the appliance surface shall be ____ feet: (A)5' (B)3' (C)6' (D)4' -
Correct Answers ✅4' (IMC 507.4.1) The return air duct to a blower type warm air furnace is being replaced, how many sq. inches of free air are required per 1,000 BTU or rated capacity of the furnace? (A)3" (B)1" (C)4" (D)2" - Correct Answers ✅2" (Fuel Gas Code
9.3.3.2)
The existing terminals of a mechanical draft system shall not be less than ___
feet above finished ground level where located adjacent to public walkways:
(A)7' (B)2' (C)8' (D)5' - Correct Answers ✅7' (IMC 804.3.4 #1) What device is installed to prevent a back draft occurring in an appliance?(A)Power draft vent (B)Vent cap (C)Saftey relief valve (D)Draft hood - Correct Answers ✅Draft hood (Fuel Gas Code, 3.3.33) Minimum distance between the lowest edge of a grease filter and the cooking surface with exposed flame or burners is: (A)42" (B)6" (C)48" (D)24"
- Correct Answers ✅24" (IMC Table 507.2.8) 1 / 3
HVAC journeyman prep test EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) Non-metallic ducts shall have a flame spread index of ___ or less and a
smoke-devolped index of ___ or less: (A)100,200 (B)84,723 (C)50,100
(D)25,50 - Correct Answers ✅25,50 (IMC 602.2.1) A blower fan used for the purpose of distributing supply air to a room, space,
or area is a: (A)Air-handling unit (B)Return fan (C)Make-up fan (D)Exhaust fan
- Correct Answers ✅Air handling unit (IMC Chapter #2)
Maximum flame spread distance of ___ feet for combustable electrical wires,
cables, and optical fiber cables exposed within a plenum: (A)30' (B)3' (C)70'
(D)5' - Correct Answers ✅5' (IMC 602.2.1.1) Where all combustion air is provided by a mechanical air supply system, the
combustion air shall be supplied from outdoors at the minimum rate of:
(A)100ft3/1000BTU/hr (B)0.35ft3/1000BTU/hr (C) 25ft3/1000BTU/hr (D)50ft/1000BTU/hr - Correct Answers ✅0.35ft3/BTU/hr (Fuel Gas Code,
9.3.6)
A chimney for a residential type or low-heat appliances shall exceed at least ___ feet above the highest point where it passes through the roof of a building? (A)5' (B)2' (C)10' (D)3' - Correct Answers ✅3' (Fuel Gas Code,
12.6.2.1)
A chimney for a low heat appliance must withstand a continuous flue gas
temperature not exceeding ___: (A)1000 (B)1800 (C)800 (D)1200 - Correct
Answers ✅1000 When running flue gas pipe, any angle greater than ___ from the vertical is
considered to be horizontal: (A)30 (B)60 (C)45 (D)90 - Correct Answers
✅45 (Fuel Gas Code, 12.7.3.2) 2 / 3
HVAC journeyman prep test EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) A direct vent appliance with an input over 50,000BTU/hr, shall have at least
___ inches from any air opening into a building: (A)12 (B)6 (C)18 (D)9 -
Correct Answers ✅12 Unless otherwise specified by the designer, that sealing requirements do not
contain provisions to: withstanding temperatures higher than ___ degrees F,
or lower than ___ degrees F: (A)120, 40 (B)175, -30 (C)40,120 (D)212, 32 -
Correct Answers ✅120, 40 What minimum pitch per foot is required for the horizontal run of a vent connector? (A)3/4" (B)1/4" (C)1" (D)1/2" - Correct Answers ✅1/4"
Maximum allowable load size for 1"x18Ga. hanger is: (A)420lbs (B)260lbs
(C)700lbs (D)320LBS - Correct Answers ✅420lbs At least ___ feet of clearance shall be available between the access opening
and the edge of the roof: (A)8' (B)4' (C)10' (D)6' - Correct Answers ✅6'
A type 1 hood shall have what minimum clearance to combustable materials? (A)14" (B)6" (C)18" (D)10" - Correct Answers ✅18" (IMC
507.2.6)
Unless complying as underground duct per section 603.8, ducts shall be installed a minimum of ___ inches from the earth: (A)4" (B)2" (C)6" (D)3' - Correct Answers ✅4" Smoke detectors shall be located downstream of an air filter and ahead of
any branch connectors in a return stream with flow greater than:
(A)4,000CFM (B)2,000CFM (C)5,000CFM (D)3,000CFM - Correct Answers ✅2,000CFM
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