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HVAC journeyman prep test Questions & answers
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HVAC journeyman prep testA 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 - ANS-Corridor wall (IMC 607.5.4)
Flexible air duct may be what length? (A)10' (B)2' (C)14' (D)6' - ANS-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' - ANS-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" - ANS-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' - ANS-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 - ANS-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" - ANS-24" (IMC Table
507.2.8)
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 -
ANS-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 - ANS-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' - ANS-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 -
ANS-0.35ft3/1000BTU/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' - ANS-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 - ANS-1000 (IMC 202 Appliance
Type)
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 - ANS-45 (Fuel Gas Code, 12.7.3.2)
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 - ANS-12 (Fuel code 12.9.3)
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 - ANS-120, 40 (SMACNA S1.9
e. 4. )
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" - ANS-1/4" (Fuel code 12.11.7)
Maximum allowable load size for 1"x18Ga. hanger is: (A)420lbs (B)260lbs (C)700lbs
(D)320LBS - ANS-420lbs (SMACNA Table 5-1)
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' - ANS-6' (Fuel code 9.4.3.3)
A type 1 hood shall have what minimum clearance to combustable materials? (A)14"
(B)6" (C)18" (D)10" - ANS-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' - ANS-4" (IMC 603.14)
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