Black Seal Test Questions and Answers 2024

Black Seal Test Questions and Answers 2024 What does PSIA stand for? - answer-Psig + atmospheric pressure Carryover can lead to: - answer-Water Hammer Water column & gauge glass should be blown down: - answer-Daily If water leaves the boiler at 170•, what temperature does it return at? - answer-150• What is the most common cause of cast iron boiler failure? - answer-Cracking The positioning control cannot function without: - answer-Air What is the most common of problems in a hot water system? - answer-Air What fire tube is most efficient? - answer-4 Pass Where are the combustion gases on a serpentine boiler? - answer-Below the tubes What is the purpose of a check valve? - answer-To Prevent reverse flow & Allow flow in one direction