Plant Operation Practice Test

What should a boiler be subjected to after major repair work on the steam or waterside or a low-water condition?

1. A hydrostatic test

2. A pressure test

3. A routine inspection

4. A cleaning procedure

The correct answer is: A hydrostatic test

After major repair work on the steam or waterside of a boiler, or following a low-water condition, it is essential to subject the boiler to a hydrostatic test. This test is critical for ensuring the integrity of the boiler system. During a hydrostatic test, water is introduced into the boiler at a pressure higher than the normal operating pressure, allowing inspectors to identify any leaks or weaknesses in the boiler structure. The purpose of this rigorous testing is to confirm that all repairs have been made properly and that the boiler can safely handle the pressures it will encounter during normal operations. By using water, the test minimizes risks, as water is incompressible and any sudden failure would be less hazardous than if gas or steam were used. Ultimately, passing a hydrostatic test is a safeguard that helps prevent potential failures or accidents in operation, thereby ensuring both safety and efficiency in plant operations. While a pressure test is important, it typically involves gaseous testing under operating conditions rather than the pre-operational assessment conducted by a hydrostatic test. Routine inspections and cleaning procedures, while necessary for ongoing maintenance and performance, do not provide the same level of assurance regarding the integrity and safety of the boiler after substantial repairs.