🔍 Key Concepts

• 46 CFR Part 58 – Engineering Equipment (focus on requirements for boiler controls and safety devices) • Difference between design/strength testing pressure and operational testing of control systems • Meaning of maximum allowable working pressure (MAWP) vs normal operating pressure

💭 Think About

• Ask yourself: when you test a combustion control system, are you mainly checking the strength of the pressure parts, or the correct operation of the controls and safeties under realistic conditions? • Which option best represents the pressure condition under which the control system will actually have to perform its safety functions in everyday service? • Think about which choices describe over‑pressure tests (for structural integrity) and which describe functional tests (for controls and automation).

✅ Before You Answer

• Verify in 46 CFR Part 58 that hydrostatic tests of boilers use a higher multiple of MAWP than control‑system operational tests. • Confirm how the regulation specifically phrases testing of boiler combustion control systems—look for wording about normal operation and load conditions. • Make sure you distinguish between testing the boiler shell/tubes vs testing the combustion control system itself.