HVAC JOURNEYMAN EXAM 2024-2025/TEST EXAM
WITH OVER 300 QUESTIONS AND CORRECT
ELABORATED ANSWERS ALREADY RATED BY
EXPERTS AS THE BEST EXAM (GRADED A+)
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)
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 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 (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)
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 - ANSWER- 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" - ANSWER- 1/4" (Fuel code 12.11.7)
Maximum allowable load size for 1"x18Ga. hanger is: (A)420lbs (B)260lbs (C)700lbs
(D)320LBS - ANSWER- 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' - ANSWER- 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" - ANSWER- 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' - ANSWER- 4" (IMC
603.14)
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)
WITH OVER 300 QUESTIONS AND CORRECT
ELABORATED ANSWERS ALREADY RATED BY
EXPERTS AS THE BEST EXAM (GRADED A+)
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)
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 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 (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)
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 - ANSWER- 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" - ANSWER- 1/4" (Fuel code 12.11.7)
Maximum allowable load size for 1"x18Ga. hanger is: (A)420lbs (B)260lbs (C)700lbs
(D)320LBS - ANSWER- 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' - ANSWER- 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" - ANSWER- 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' - ANSWER- 4" (IMC
603.14)
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)
