Hvac Journeyman Exam Questions and Answers, Latest Updated 2024/2025 (GRADED)

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) 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 Questions and Answers Updated 2024/2025 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 Floor furnaces shall be protected, where necessary, against _____.(A) severe wind conditions (C) damage by mechanical means(B) contact with fire-rated material (D) contact with noncombustible material - ANSWER-35 D 205.0 ... - ANSWER-36 A 225.0 Sediment traps in fuel-gas lines are not required to _____.A) hydronic boilers (C) residential furnaces(B) gas fireplaces (D) commercial furnaces. - ANSWER-37 A 911.6(B) ... - ANSWER-38 B 912.8 Condensate from air-cooling coils and the overflow from evaporative coolers shall be collected and - ANSWER-39 C 304.1.2,