Page 1 of 32
UPDATED HVAC JOURNEYMAN PREP TEST EXAM
WITH VERIFIED ANSWERS
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 - answer-2,000CFM (IMC 606.2.1)
What material is used only on a fan that comes in contact
with flammable or explosive vapor? (A)Ferris steel with
painted body (B)Cast steel (C)Non-ferris steel coating with
non-sparking metal (D)Forged steel - answer-Non-ferris
steel coated with non-sparking material (?)
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 - answer-Corridor
wall (IMC 607.5.4)
Flexible air duct may be what length? (A)10' (B)2' (C)14' (D)6'
- answer-14' (IMC 603.6.1.1)
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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' - answer-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" - answer-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' -
answer-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 - answer-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
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is: (A)42" (B)6" (C)48" (D)24" - answer-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 - answer-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 - answer-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' - answer-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
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(D)50ft/1000BTU/hr - answer-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'
- answer-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 - answer-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 - answer-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 - answer-12 (Fuel code 12.9.3)
UPDATED HVAC JOURNEYMAN PREP TEST EXAM
WITH VERIFIED ANSWERS
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 - answer-2,000CFM (IMC 606.2.1)
What material is used only on a fan that comes in contact
with flammable or explosive vapor? (A)Ferris steel with
painted body (B)Cast steel (C)Non-ferris steel coating with
non-sparking metal (D)Forged steel - answer-Non-ferris
steel coated with non-sparking material (?)
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 - answer-Corridor
wall (IMC 607.5.4)
Flexible air duct may be what length? (A)10' (B)2' (C)14' (D)6'
- answer-14' (IMC 603.6.1.1)
, Page 2 of 32
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' - answer-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" - answer-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' -
answer-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 - answer-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
, Page 3 of 32
is: (A)42" (B)6" (C)48" (D)24" - answer-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 - answer-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 - answer-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' - answer-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
, Page 4 of 32
(D)50ft/1000BTU/hr - answer-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'
- answer-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 - answer-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 - answer-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 - answer-12 (Fuel code 12.9.3)
