HVAC Journeyman Prep Test Questions
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___ is the refrigerant that requires special conditions - Answer -R-717 (Ammonia)
___ shall be used in square throat elbows in both return and supply duct: - Answer -Turning vanes
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)
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
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
A chimney for a medium-heat appliance shall extend at least ___ feet higher than any portion of any
building within ___ feet: (A)5',25' (B)2',10' (C)10',25' (D)3',10' - Answer -10',25' (Fuel Gas Code,
12.6.2.2)
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 cooling coil is to be installed in a duct system containing an existing furnace heat exchanger. Unless
otherwise listed, the code requires the air flows first through: (A)The heat exchanger (B)A diverter unit
(C)The cooling coil (D)A bypass duct - Answer -The heat exchanger (Fuel Gas Code, 10.10.6.3)
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"
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
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% - Answer -
25%
A fuel gas system is designed for an operating pressure of 5PSI, what is the lowest test pressure?
(A)10PSI (B)15PSI (C)7.5PSI (D)2.5PSI) - Answer -7.5PSI (Fuel Gas Code, 8.1.4.2)
A galvanized 12" vent for a non-residential low-heat appliance shall have a minimum thickness of ___
inches: (A)0.019 (B)0.023 (C)0.029 (D)0.034 - Answer -0.029
, 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)
A non-load bearing stud may be notched ___% of its depth: (A)15% (B)25% (C)30% (D)40% -
Answer -40% (IMC 302.3.2)
A Pair of hanger straps at 2.2m spacing for 1000 x 1000 mm duct should be: (A)25.4 x 1 (B)25.4 x 1.31
(C)38.1 x 1.61 (D)25.4 x 1.61 - Answer -25.4 x 1.31
A Pair of hanger straps spaced at 5' for a 30" X 30" duct should be: (A)1" x 8Ga. (B)1" x 20Ga. (C)1" x
22Ga. (D)1" x 24Ga. - Answer -1" x 22Ga.
A Permit is not required if a self-contained refrigerant system has ___lbs or less of refrigerant: (A)5lbs
(B)10lbs (C)8lbs (D)4lbs - Answer -10lbs (IMC 106.2.7)
A Permit to accomplish work may be extended a maximum of how many times? (A)1 (B)2 (C)3 (D)4 -
Answer -1 (IMC 106.4.4)
A roof jack must be flashed a minimum of ___ inches above a roof: (A)8" (B)12" (C)6" (D)4" -
Answer -8" (SMACNA 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)
A Type B or a Type L gas vent shall terminate at least _____ feet in vertical height above the highest
connected appliance draft hood or flue collar: (A)2' (B)5' (C)8' (D)10' - Answer -5' (Fuel Gas Code,
12.6.5.1.2)
A type L gravity vent system for a gas-fired appliance shall terminate what minimum distance above the
highest vent collar it serves? (A)3' (B)5' (C)7' (D)9' - Answer -5'
A type L vent requires ___ inches of clearance to combustibles: (A)9" (B)18" (C)24" (D)12" -
Answer -9"
A vent connector shall be installed without any dips or sags and shall slope upward toward the vent at
least ___ inch per foot: (A)1/8" (B)1/4" (C)1" (D)1/2" - Answer -1/4"
A vented wall furnace shall be installed so that a door cannot swing within what distance of the furnace
air inlet or outlet? (A)9" (B)12" (C)6" (D)3" - Answer -3"
A wall mounted canopy hood used with a heavy duty cooking appliance shall have a minimum CFM per
linear square foot/hood of: (A)550 (B)400 (C)300 (D)None of the above - Answer -400 (IMC
507.5.2)
A wall mounted canopy hood used with heavy duty cooking appliance shall have a minimum CFM per
linear foot of hood of: (A)550CFM (B)400CFM (C)300CFM (D)500CFM - Answer -400CFM (IMC
with Verified Answers Download and
Get a Full Score
___ is the refrigerant that requires special conditions - Answer -R-717 (Ammonia)
___ shall be used in square throat elbows in both return and supply duct: - Answer -Turning vanes
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)
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
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
A chimney for a medium-heat appliance shall extend at least ___ feet higher than any portion of any
building within ___ feet: (A)5',25' (B)2',10' (C)10',25' (D)3',10' - Answer -10',25' (Fuel Gas Code,
12.6.2.2)
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 cooling coil is to be installed in a duct system containing an existing furnace heat exchanger. Unless
otherwise listed, the code requires the air flows first through: (A)The heat exchanger (B)A diverter unit
(C)The cooling coil (D)A bypass duct - Answer -The heat exchanger (Fuel Gas Code, 10.10.6.3)
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"
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
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% - Answer -
25%
A fuel gas system is designed for an operating pressure of 5PSI, what is the lowest test pressure?
(A)10PSI (B)15PSI (C)7.5PSI (D)2.5PSI) - Answer -7.5PSI (Fuel Gas Code, 8.1.4.2)
A galvanized 12" vent for a non-residential low-heat appliance shall have a minimum thickness of ___
inches: (A)0.019 (B)0.023 (C)0.029 (D)0.034 - Answer -0.029
, 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)
A non-load bearing stud may be notched ___% of its depth: (A)15% (B)25% (C)30% (D)40% -
Answer -40% (IMC 302.3.2)
A Pair of hanger straps at 2.2m spacing for 1000 x 1000 mm duct should be: (A)25.4 x 1 (B)25.4 x 1.31
(C)38.1 x 1.61 (D)25.4 x 1.61 - Answer -25.4 x 1.31
A Pair of hanger straps spaced at 5' for a 30" X 30" duct should be: (A)1" x 8Ga. (B)1" x 20Ga. (C)1" x
22Ga. (D)1" x 24Ga. - Answer -1" x 22Ga.
A Permit is not required if a self-contained refrigerant system has ___lbs or less of refrigerant: (A)5lbs
(B)10lbs (C)8lbs (D)4lbs - Answer -10lbs (IMC 106.2.7)
A Permit to accomplish work may be extended a maximum of how many times? (A)1 (B)2 (C)3 (D)4 -
Answer -1 (IMC 106.4.4)
A roof jack must be flashed a minimum of ___ inches above a roof: (A)8" (B)12" (C)6" (D)4" -
Answer -8" (SMACNA 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)
A Type B or a Type L gas vent shall terminate at least _____ feet in vertical height above the highest
connected appliance draft hood or flue collar: (A)2' (B)5' (C)8' (D)10' - Answer -5' (Fuel Gas Code,
12.6.5.1.2)
A type L gravity vent system for a gas-fired appliance shall terminate what minimum distance above the
highest vent collar it serves? (A)3' (B)5' (C)7' (D)9' - Answer -5'
A type L vent requires ___ inches of clearance to combustibles: (A)9" (B)18" (C)24" (D)12" -
Answer -9"
A vent connector shall be installed without any dips or sags and shall slope upward toward the vent at
least ___ inch per foot: (A)1/8" (B)1/4" (C)1" (D)1/2" - Answer -1/4"
A vented wall furnace shall be installed so that a door cannot swing within what distance of the furnace
air inlet or outlet? (A)9" (B)12" (C)6" (D)3" - Answer -3"
A wall mounted canopy hood used with a heavy duty cooking appliance shall have a minimum CFM per
linear square foot/hood of: (A)550 (B)400 (C)300 (D)None of the above - Answer -400 (IMC
507.5.2)
A wall mounted canopy hood used with heavy duty cooking appliance shall have a minimum CFM per
linear foot of hood of: (A)550CFM (B)400CFM (C)300CFM (D)500CFM - Answer -400CFM (IMC
