🔍 Key Concepts

• air-operated friction clutch components and how they transmit power • the role of disc springs in maintaining clutch engagement pressure • how operating conditions (load, speed, new vs. worn parts) might affect friction and slippage

💭 Think About

• Which choice directly reduces the normal (clamping) force that keeps the friction surfaces tightly engaged? • Which options might change engine or operating conditions but would NOT necessarily cause the clutch plates to lose their grip if the clutch is in good condition? • Consider what happens right after installing new friction blocks: is their tendency to slip higher or lower compared to worn ones?

✅ Before You Answer

• Identify which factor most clearly reduces clutch engagement pressure on the friction plates. • Think about which condition is internal to the clutch mechanism (not just how the engine is run). • Ask: which option would still cause slippage even at normal load and speed because the clutch cannot hold firmly?