Minnesota Boiler License Practice Exam

New boilers and bills on which extensive replacement of pressure parts must receive what kind of test?

1. Hydrostatic

2. A.S.M.E.

3. Alkaline

4. Pneumatic

The correct answer is: Hydrostatic

The requirement for a hydrostatic test for new boilers and those undergoing extensive replacement of pressure parts is grounded in the need to ensure safety and integrity. A hydrostatic test involves filling the boiler with water and pressurizing it above its normal operating pressure to check for leaks and structural weaknesses. This testing method allows for the detection of any potential failures before the boiler is put into service, ensuring that all welded and pressure boundary parts can withstand operating conditions without risk of failure. Additionally, this procedure helps identify any manufacturing defects or issues incurred during repairs, which is crucial for the reliability and safety of steam and hot water systems. In contrast, other test types mentioned like A.S.M.E., which refers to the American Society of Mechanical Engineers, does not represent a specific type of test but rather sets the standards for pressure equipment. Alkaline tests are typically related to water chemistry rather than integrity testing of pressure vessels, while pneumatic tests use air instead of water and are generally not preferred due to the higher risk involved with compressible gases.