Hvac Journeyman Exam (Iapmo 2023 code) questions with complete solutions

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. correct 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. correct 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 correct 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. correct 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 correct 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 correct 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". correct 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. correct 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" correct 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 correct 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. correct 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 correct answer: 31 D. 701.2.1