🔍 Key Concepts

• Carbon deposits in compressor valves are mainly formed from decomposed or burned lubricating oil. • Higher lubricating oil carryover (oil pumping) usually affects how much material is available to form deposits. • Compression temperature influences how fast oil breaks down, burns, or forms carbon

💭 Think About

• If you increase the amount of oil being carried into the compression space, what logically happens to the potential amount of carbon that can build up? • Does higher gas/valve temperature tend to make oil more stable and less likely to carbonize, or does it tend to break oil down faster? • Think about which combination of oil quantity and temperature would most realistically give you the worst carbon-fouling problem in real machinery.

✅ Before You Answer

• Compare each option’s description of oil pumping vs. deposit rate and decide which relationship makes physical sense. • Compare each option’s description of temperature vs. deposit rate and think about how temperature affects oil breakdown and coking. • Eliminate any answer where the direction of change (directly vs. inversely proportional) seems to contradict normal lubricating oil behavior at higher temperatures.