The control designed as a safety back up , should the pressure control fail is a: _____________.
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What is the internal resistance to the flow of fuel oil?
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what is the unit called that controls the starting and stopping of the burner by sensing the temperature of the water in a hot water boiler?
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Which of the following conditions would probably cause foaming?
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What construction method is required for heat exchangers used in potable water applications?
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What is the maximum size safety valve that may be installed on a low pressure boiler?
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What does the boiler aquastat control?
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Whose instructions should be followed when a stack is to be attached to an atmospheric boiler?
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The capacity of a safety valve used on a steam boiler is measured in
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What is the advantage of a gate valve over a globe valve?
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