HVAC JOURNEYMAN EXAM AND PRACTICE EXAM 300 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (100% CORRECT AND VERIFIED ANSWERS) |AGRADE Rating 1 Rating 2 Rating 3 Rating 4 Rating 5 1 reviews| 5 times sold

HVAC JOURNEYMAN EXAM 2023-2024 AND
PRACTICE EXAM 300 QUESTIONS AND
CORRECT DETAILED ANSWERS (100%
CORRECT AND VERIFIED ANSWERS ALREADY
GRADED A+
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.

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.

Any part of a venting system installed at an angle greater than 45 degrees from the
vertical is considered by code to be _____.
(A) vertical
(B) Horizontal
(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 metal
(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

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

An appliance designed primarily to supply hot water equipped with automatic controls
limiting water -ANSWER- 20 B 1201.2.1.8

temperature to a maximum of 210°F is a _____.(A) water heater (C) expansion tank(B)
steam boiler (D) gas heater. -ANSWER- 21 A 507.1.3

... -ANSWER- 22 D 1129.0

A cooling coil is to be installed in a duct system containing an existing furnace heat
exchanger. Unless -ANSWER- 23 C 907.1

otherwise listed, the code requires that the air flows first through _____.(A) the heat
exchanger (C) a diverter unit(B) the cooling coil (D) a bypass duct -ANSWER- 24
C 903.5

... -ANSWER- 25 D 802.7.4.3

The space in which any floor furnace is installed shall be accessible by an opening in
the foundation not -ANSWER- 26 B 1312.3.2

less than _____.(A) 24'' x 24'' (C) 20'' x 20''(B) 24'' x 18'' (D) none of the above -
ANSWER- 27 C 507.2.1

... -ANSWER- 28 B 510.7.5

Buildings of more than _____ feet in height shall have an inside means of access to the
roof.(A) 14 (C) 15 (B) 16 (D) 20 -ANSWER- 29 C 701.1

... -ANSWER- Exxeption (1)

The clearance above the top of a casing or appliance for an unlisted upflow furnace is
_____ inches.(A) 12 (C) 8(B) 6 (D) 24 -ANSWER- 30 D 1129.0

... -ANSWER- 31 D 701.2.1

When required clearance from the lowest portion of a floor furnace to the ground cannot
be obtained, the -ANSWER- 32 B 602.2 Ex (1)

ground below and to the sides shall be excavated to form a _____ pit under the
furnace.(A) rectangular (C) 45-degree sloped(B) rounded (D) basin-like. -ANSWER-
33 C 802.5.5.1

... -ANSWER- 34 A 212.0