If a diesel engine has been stopped because...

Question 1 / 2707066636eef28f7522a1c51f9be

Question 1 of 2707066636eef28f7522a1c51f9be

If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase __________.

Question 1 of 27070

If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase __________.

🔍 Key Concepts

• Crankcase explosion risk after severe overheating or piston seizure • Purpose and design of crankcase inspection covers vs. explosion relief doors • Safe sequence of actions before opening any crankcase access after abnormal overheating

💭 Think About

• What happens inside the crankcase when oil and deposits are exposed to very high temperatures and hot spots remain after shutdown? • Which devices on the crankcase are specifically designed to relieve pressure safely, and which are NOT intended to be opened while hot? • Why might adding more ventilation or opening covers too early actually increase the risk of explosion or fire rather than reduce it?

✅ Before You Answer

• Verify which components are designed as automatic safety devices (spring‑loaded / weighted relief doors) versus manual access covers • Check standard practice: after a suspected crankcase fire or hot spot, should personnel be near or opening the crankcase before it has cooled and been checked? • Confirm whether continuing or increasing air flow into a hot crankcase is recommended immediately after a seizure, or if isolation and cooling time are emphasized first

Question 1 of 27070

If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase __________.

Scavenge pump should be immediately secured to prevent loss of lube oil

Ventilation system should be continued in operation for one hour for cooling

Inspection covers should not be opened until the engine has cooled

Explosion covers should be opened slightly to provide extra ventilation

Question 1 / 2707066636eef28f7522a1c51f9be

Question 1 of 2707066636eef28f7522a1c51f9be

If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase __________.

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Question 1 of 27070

If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase __________.