Class 5 Boiler Practice Exam

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How many psi must a cast iron steam boiler be tested after installation?

30 psi
45 psi
60 psi
75 psi

The correct answer is: 45 psi

A cast iron steam boiler must be tested at 45 psi after installation to ensure its integrity and safety. This pressure test is critical as it helps to verify that the boiler has been installed correctly and can withstand the pressures it will encounter during operation. The test ensures that there are no leaks or weaknesses in the boiler structure, which could lead to failures or hazardous situations. Testing at 45 psi is in line with industry standards and regulatory requirements designed to prioritize safety. A successful pressure test at this level indicates that the boiler is safe for operation and can handle the typical pressures it will experience when functioning. This practice is essential to prevent accidents and ensure longevity and reliability of the boiler system.