The maximum allowable working pressure of a...

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Question 1 of 205eccefa0bacbc34ba4d4705c

The maximum allowable working pressure of a particular boiler is 1050 psig (7340 kPa). The hydrostatic test pressure to be used during the Coast Guard required quadrennial inspection will be __________.

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🔍 Key Concepts

• Coast Guard hydrostatic test requirements for boilers in 46 CFR Part 61 (periodic tests and inspections) • Relationship between maximum allowable working pressure (MAWP) and required hydrostatic test pressure • Why test pressure must be higher than MAWP but not so high that it risks damaging the boiler

💭 Think About

• Think about whether the test pressure should be the same as, slightly higher than, or a specific multiple of the boiler’s maximum allowable working pressure. • Ask yourself: in Coast Guard regulations, is hydrostatic test pressure usually expressed as a fixed percentage or multiple of MAWP? If so, what is that multiple? • Once you know the correct multiple, multiply it by 1050 psig and see which choice matches best.

✅ Before You Answer

• Confirm in 46 CFR Part 61 (Boilers and Machinery Tests) what multiple of MAWP is specified for hydrostatic tests. • Check that you are using gauge pressure (psig), not absolute pressure, when doing the calculation. • After multiplying the MAWP by the required factor, verify which option matches both the psig value and the corresponding kPa value.

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