Hvac Journeyman Exam 2024 Questions and Correct Answers.
Defects on gas piping or fittings shall be _____.(A) repaired(B) replaced or repaired
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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)
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
Hvac Journeyman Exam 2024 Questions
and Correct Answers.
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
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 - ANSWER-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 -
ANSWER-D. A condenser is the piping which vaporizes the refrigerant liquefied by
removal of heat, UMC Section 2 0 5.0
is a _____.(A) compressor (C) evaporator(B) generator (D) condenser - ANSWER-18 D
502.0
... - ANSWER-19 C 1313.4 . [Show Less]