SC Boiler Installation Practice Questions - South Carolina Boiler Installation Contractor Examination Exam

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A hot-water heating boiler has a safety relief valve set at 30 psi. Per ASME HG-611, the mechanical pressure-gage dial shall be graduated to not less than 1.5 nor more than 3.5 times that set pressure. What is the acceptable full-scale window?

0 to 30 psi 0 to 40 psi 45 psi to 105 psi 0 to 200 psi

Correct Answer:

45 psi to 105 psi

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