Engineering · Steam — Boiler Safety Valve
A boiler safety valve is set to lift at a pressure that is:
- AAt or below the boiler's maximum allowable working pressure, never above it✓ Correct
- BBelow normal working pressure
- CExactly double the working pressure
- DDetermined by the watchstander each watch
Explanation
Safety valves must be set so the boiler cannot exceed its maximum allowable working pressure. They are required, of adequate relieving capacity, and must not be isolated or have their settings tampered with in service.
Authority: 46 CFR Subchapter F; ASME Boiler Code
Practice the full Engineering bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Engineering questions
- Diesel — Operating Cycle
In a four-stroke-cycle diesel engine, the events occur in which order?
- Diesel — Operating Cycle
Compared with a four-stroke engine of the same speed and cylinder size, a two-stroke-cycle diesel produces a power stroke:
- Diesel — Air Systems
The primary purpose of scavenging in a two-stroke diesel engine is to:
- Diesel — Air Systems
A turbocharger increases engine power output mainly by:
- Diesel — Combustion
Ignition of the fuel in a diesel engine is initiated by:
- Diesel — Fuel
The cetane number of a diesel fuel is a measure of its: