A substantial increase in crankcase pressure...

Question 1 / 205eccefa3bacbc34ba4d47dd0

Question 1 of 205eccefa3bacbc34ba4d47dd0

A substantial increase in crankcase pressure could be an indication of __________.

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Question 1 of 20

5eccefa3bacbc34ba4d47dd0

A substantial increase in crankcase pressure could be an indication of __________.

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🔍 Key Concepts

• Crankcase pressure and what causes it to increase • How piston rings and cylinder liners control gas blow‑by • Whether lube oil pressure or relief valves are normally connected to crankcase pressure changes

💭 Think About

• Which component, if worn or damaged, would allow combustion gases to leak past the piston into the crankcase? • Would correctly seated new rings normally increase or decrease crankcase pressure? • Does a cylinder relief valve failure change pressure in the cylinder, the crankcase, or somewhere else?

✅ Before You Answer

• Be clear on what space the crankcase is and how it is ventilated • Match each answer choice to whether it directly affects gas leakage into the crankcase • Eliminate any options that only affect oil pressure or cylinder safety but not crankcase pressure

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Question 1 of 20

A substantial increase in crankcase pressure could be an indication of __________.

excessive lube oil pressure

the proper seating of new rings

a worn cylinder liner

a malfunctioning cylinder relief valve

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