HVAC JOURNEYMAN PREP TEST EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST
UPDATE
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
Corridor wall (IMC 607.5.4)
Flexible air duct may be what length? (A)10' (B)2' (C)14' (D)6'
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'
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"
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'
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
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"
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
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
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'
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
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'
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
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
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
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
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"
1/4" (Fuel code 12.11.7)
Maximum allowable load size for 1"x18Ga. hanger is: (A)420lbs (B)260lbs
(C)700lbs (D)320LBS
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'
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"
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'
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
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
Non-ferris steel coated with non-sparking material (?)
Joints, seams, and penetrations of grease ducts shall be made with a continuous
liquid-tight ___ made on the external surface of the duct system: (A)Foil taped
connection (B)Soldered connection (C)Weld or braze (D)Lapped and sealed
Weld or braze (IMC 506.3.2)
A duct system for hazardous exhaust shall be required whenever a flammable
vapor is present in concentrating ___ percent of its lower flammability limit:
(A)15% (B)20% (C)30% (D)25%
25% (IMC 510.2 #1)
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST
UPDATE
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
Corridor wall (IMC 607.5.4)
Flexible air duct may be what length? (A)10' (B)2' (C)14' (D)6'
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'
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"
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'
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
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"
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
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
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'
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
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'
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
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
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
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
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"
1/4" (Fuel code 12.11.7)
Maximum allowable load size for 1"x18Ga. hanger is: (A)420lbs (B)260lbs
(C)700lbs (D)320LBS
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'
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"
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'
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
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
Non-ferris steel coated with non-sparking material (?)
Joints, seams, and penetrations of grease ducts shall be made with a continuous
liquid-tight ___ made on the external surface of the duct system: (A)Foil taped
connection (B)Soldered connection (C)Weld or braze (D)Lapped and sealed
Weld or braze (IMC 506.3.2)
A duct system for hazardous exhaust shall be required whenever a flammable
vapor is present in concentrating ___ percent of its lower flammability limit:
(A)15% (B)20% (C)30% (D)25%
25% (IMC 510.2 #1)
