Crankcase explosion relief valves should be...

Question 1 of 270705eccefa1bacbc34ba4d47459

Crankcase explosion relief valves should be of the __________.

Question 1 of 27070

Crankcase explosion relief valves should be of the __________.

🔍 Key Concepts

• Crankcase explosions on large diesel engines and how gases/pressure build up • Purpose of a relief valve on a crankcase (what it must do when pressure rises, and what it must do after the event) • How a spring in a valve can control opening and closing at a set pressure

💭 Think About

• Think about what you want the valve to do when there is a sudden rise in crankcase pressure: should it open automatically, and what force makes it close again? • Which type of design will prevent the valve from staying open unnecessarily, yet will still open quickly and easily when dangerous pressure builds up? • Consider the difference between a valve that is held shut by a spring until a set pressure is reached, versus one that needs some other action to return to its seat.

✅ Before You Answer

• Verify which option describes a valve that opens automatically at a preset pressure and then reseats itself once pressure is relieved. • Eliminate any options that sound like they require external power or manual action to operate or reset. • Check your engineering knowledge: crankcase relief valves must prevent flame or burning gases from being discharged freely into the engine room—so which basic type is commonly used for simple, automatic, pressure‑relief duties?