Defects on gas piping or fittings shall be _____.(A) repaired(B) replaced or repaired and
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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
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