🔍 Key Concepts

• Valve maintenance terminology used in marine engineering • Difference between material removal methods: grinding vs cutting vs polishing • Common shop practices for seating valve faces and seats

💭 Think About

• Which term specifically refers to rubbing or grinding two mating surfaces together with an abrasive compound to improve the fit? • Which process name is most commonly associated with finishing cylinder walls or bores, rather than valve seats? • Which option refers more to checking or marking high spots, rather than fully finishing the surface?

✅ Before You Answer

• Match each choice with its typical primary application (valves vs bores vs general machining) • Identify which process normally uses abrasive compound between two surfaces moved against each other • Eliminate any process that mainly means cutting a new surface rather than gradually grinding two existing ones together