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HVAC JOURNEYMAN Exam Questions and Correct
Detailed Answers Top Rated 2025
Defects on gas piping or fittings shall be _____.(A) repaired(B) replaced or
repaired and retested(C) repaired by a certified welder(D) ignored, as the
operating pressure is much less than the air test. - (answers)B. Fitting shall be
replaced or repaired and retested. UMC Section 1316.4.3
Every absorption refrigerating system supported from the ground shall rest on a
concrete slab extending not less than _____ the adjoining ground level.(A) 3
inches below(B) 3 inches above (C) 6 inches below(D) 6 inches above. -
(answers)B. Slab extending not less than 3" above the adjoining ground level.
UMC Section 1106.2
Any part of a venting system installed at an angle greater than 45 degrees from
the vertical is considered by code to be _____.(A) vertica(B) horizontal l (C) a flat
vent (D) an offset vent - (answers)B. any part of the venting installed at an angle
GREATER than 45 degrees is considered by this code to be Horizontal UMC
Section 802.6.1.1
Listed transition ducts f or clothes dryers shall not exceed_____ feet in length. A.3
B.4 C.5 D.6. - (answers)D. Dryers shall not exceed 6 feet in length. UMC Section
504.3.2.1
Industrial product-conveying ducts and their fittings for abrasive and nonabrasive
dust or solid materials shall be constructed of _____.(A) sheet meta(B) polyvinyl
chloride l (C) fiberglass (D) A and C apply - (answers)A. Shall Be Constructed of
sheet metal. UMC Section. 5 0 6.1
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Industrial product-conveying ducts and their fittings for abrasive and nonabrasive
dust or solid materials shall be constructed of _____.(A) sheet metal ((B) polyvinyl
chloride C) fiberglass (D) A and C apply - (answers)A 511.2
Unlisted vented gas fireplaces shall have a clearance at the sides and rear of not
less than _____ inches. Is the Answer: A. 10" B. 12" C 16" D. 18". - (answers)D.
clearance of an unlisted vented gas fireplace at the sides and the rear not less
than 18". UMC Section 908.2(B)
Leaks in gas piping shall be located _____.(A) with a sniffer(B) with a presto-lite
flame (C) with a noncorrosive leak-detecting fluid (D) by increasing the air
pressure during a test until the leaks are heard as a whistle. - (answers)C. leaks in
a gas piping shall be located with a non corrosive leak detecting fluid. UMC
Section 1316.4.2
Condensate drain piping shall have a slope of not less than _____ inch per foot. A
1⁄8" B.¼" C.½" D. 1" - (answers)A. Slope of not less than 1/8" per foot. UMC
Section 309.1
The minimum gauge or size steel wire used to support horizontal metal ducts 10
inches or less in size is _____. A.14 AWG B.16 AWG C.18 AWG D.20 AWG -
(answers)C. 18 Minimum Gauge note: AWG is the abbreviation for "gauge size"
Table 6-7(B)
When smoke detectors are required as part of an automatic shutoff system, they
shall be installed in the _____. A. return air duct ahead of any fresh-air inlet(B)
main supply air duct served by such equipment(C) fresh-air inlet(D) main return
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and the main supply duct. - (answers)B. shall be installed in the main supply air
duct served by equipment. UMC Section 609.0(5)
The largest fuel-burning appliance allowed in a room 100'W x 20'L x 8'H without
combustion air openingsis _____ Btu.(A) 80,000 (C) 140,000(B) 100,000 (D)
320,000 - (answers)31 D. 701.2.1
Return air ducts that serve a dwelling unit shall be permitted to be of _____
construction? A.non-combustible B. combustible C. rated D. none of the above. -
(answers)B. Shall be permitted to be of combustible type UMC Section 602.2 Ex
(1)
Solid fuel-burning appliances _____ be connected to a venting system that serves
a gas- or oil-burningappliance.(A) shall (B) may (C) shall not(D) with special
approval may - (answers)C. appliances shall not UMC Section 802.5.5.1
Any joint obtained by joining of metal parts with alloys that melt at temperatures
higher than 840°F, but lowerthan the melting temperature of the parts to be
joined, is a _____ joint.(A) brazed(B) fused (D) soldered (C) welded - (answers)A. Is
a brazed joint UMC section 2 1 2.0
A vessel or arrangement of piping or tubing in which vaporized refrigerant is
liquefied by removal of heat is a _____.(A) compressor (C) evaporator(B)
generator (D) condenser - (answers)D. A condenser is the piping which vaporizes
the refrigerant liquefied by removal of heat, UMC Section 2 0 5.0
HVAC JOURNEYMAN Exam Questions and Correct
Detailed Answers Top Rated 2025
Defects on gas piping or fittings shall be _____.(A) repaired(B) replaced or
repaired and retested(C) repaired by a certified welder(D) ignored, as the
operating pressure is much less than the air test. - (answers)B. Fitting shall be
replaced or repaired and retested. UMC Section 1316.4.3
Every absorption refrigerating system supported from the ground shall rest on a
concrete slab extending not less than _____ the adjoining ground level.(A) 3
inches below(B) 3 inches above (C) 6 inches below(D) 6 inches above. -
(answers)B. Slab extending not less than 3" above the adjoining ground level.
UMC Section 1106.2
Any part of a venting system installed at an angle greater than 45 degrees from
the vertical is considered by code to be _____.(A) vertica(B) horizontal l (C) a flat
vent (D) an offset vent - (answers)B. any part of the venting installed at an angle
GREATER than 45 degrees is considered by this code to be Horizontal UMC
Section 802.6.1.1
Listed transition ducts f or clothes dryers shall not exceed_____ feet in length. A.3
B.4 C.5 D.6. - (answers)D. Dryers shall not exceed 6 feet in length. UMC Section
504.3.2.1
Industrial product-conveying ducts and their fittings for abrasive and nonabrasive
dust or solid materials shall be constructed of _____.(A) sheet meta(B) polyvinyl
chloride l (C) fiberglass (D) A and C apply - (answers)A. Shall Be Constructed of
sheet metal. UMC Section. 5 0 6.1
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Industrial product-conveying ducts and their fittings for abrasive and nonabrasive
dust or solid materials shall be constructed of _____.(A) sheet metal ((B) polyvinyl
chloride C) fiberglass (D) A and C apply - (answers)A 511.2
Unlisted vented gas fireplaces shall have a clearance at the sides and rear of not
less than _____ inches. Is the Answer: A. 10" B. 12" C 16" D. 18". - (answers)D.
clearance of an unlisted vented gas fireplace at the sides and the rear not less
than 18". UMC Section 908.2(B)
Leaks in gas piping shall be located _____.(A) with a sniffer(B) with a presto-lite
flame (C) with a noncorrosive leak-detecting fluid (D) by increasing the air
pressure during a test until the leaks are heard as a whistle. - (answers)C. leaks in
a gas piping shall be located with a non corrosive leak detecting fluid. UMC
Section 1316.4.2
Condensate drain piping shall have a slope of not less than _____ inch per foot. A
1⁄8" B.¼" C.½" D. 1" - (answers)A. Slope of not less than 1/8" per foot. UMC
Section 309.1
The minimum gauge or size steel wire used to support horizontal metal ducts 10
inches or less in size is _____. A.14 AWG B.16 AWG C.18 AWG D.20 AWG -
(answers)C. 18 Minimum Gauge note: AWG is the abbreviation for "gauge size"
Table 6-7(B)
When smoke detectors are required as part of an automatic shutoff system, they
shall be installed in the _____. A. return air duct ahead of any fresh-air inlet(B)
main supply air duct served by such equipment(C) fresh-air inlet(D) main return
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and the main supply duct. - (answers)B. shall be installed in the main supply air
duct served by equipment. UMC Section 609.0(5)
The largest fuel-burning appliance allowed in a room 100'W x 20'L x 8'H without
combustion air openingsis _____ Btu.(A) 80,000 (C) 140,000(B) 100,000 (D)
320,000 - (answers)31 D. 701.2.1
Return air ducts that serve a dwelling unit shall be permitted to be of _____
construction? A.non-combustible B. combustible C. rated D. none of the above. -
(answers)B. Shall be permitted to be of combustible type UMC Section 602.2 Ex
(1)
Solid fuel-burning appliances _____ be connected to a venting system that serves
a gas- or oil-burningappliance.(A) shall (B) may (C) shall not(D) with special
approval may - (answers)C. appliances shall not UMC Section 802.5.5.1
Any joint obtained by joining of metal parts with alloys that melt at temperatures
higher than 840°F, but lowerthan the melting temperature of the parts to be
joined, is a _____ joint.(A) brazed(B) fused (D) soldered (C) welded - (answers)A. Is
a brazed joint UMC section 2 1 2.0
A vessel or arrangement of piping or tubing in which vaporized refrigerant is
liquefied by removal of heat is a _____.(A) compressor (C) evaporator(B)
generator (D) condenser - (answers)D. A condenser is the piping which vaporizes
the refrigerant liquefied by removal of heat, UMC Section 2 0 5.0
