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Mechanical Hvac practice test Questions & 100% Verified Answers | Latest Update | Already Graded A+
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A separate and distinct ventilation or exhaust system shall be provided for _____? (A)noxious gases (B) corrosive fumes (C)flammable vapors (D) incompatible materials. : D. 505.1.2 In systems conveying flammable vapors, gases, or mists, the concentration shall not exceed 25 percent of the lowe...
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