HVAC JOURNEYMAN EXAM AND PRACTICE EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (100% CORRECT AND VERIFIED ANSWERS) |AGRADE
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. -
(ANSWER)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. -(ANSWER)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 -(ANSWER)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. -
(ANSWER)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 -
(ANSWER)A. Shall Be Constructed of sheet metal. UMC Section. 5 0 6.1
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 -
(ANSWER)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". -(ANSWER)D. clearance of an unlisted vented gas fireplace at
the sides and the rear not less than 18". UMC Section 908.2(B)
, HVAC JOURNEYMAN EXAM AND PRACTICE EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (100% CORRECT AND VERIFIED ANSWERS) |AGRADE
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. -(ANSWER)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" -
(ANSWER)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 -(ANSWER)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 and the main supply duct. -(ANSWER)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 -(ANSWER)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. -(ANSWER)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 -(ANSWER)C. appliances
shall not UMC Section 802.5.5.1
ANSWERS WITH RATIONALES (100% CORRECT AND VERIFIED ANSWERS) |AGRADE
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. -
(ANSWER)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. -(ANSWER)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 -(ANSWER)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. -
(ANSWER)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 -
(ANSWER)A. Shall Be Constructed of sheet metal. UMC Section. 5 0 6.1
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 -
(ANSWER)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". -(ANSWER)D. clearance of an unlisted vented gas fireplace at
the sides and the rear not less than 18". UMC Section 908.2(B)
, HVAC JOURNEYMAN EXAM AND PRACTICE EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (100% CORRECT AND VERIFIED ANSWERS) |AGRADE
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. -(ANSWER)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" -
(ANSWER)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 -(ANSWER)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 and the main supply duct. -(ANSWER)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 -(ANSWER)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. -(ANSWER)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 -(ANSWER)C. appliances
shall not UMC Section 802.5.5.1
