By what means are two sections of propulsion...

🔍 Key Concepts

• How long propulsion shaft sections are connected along their length in most conventional marine installations • Difference between solid couplings (no flexibility) and flexible couplings (allow some misalignment and shock absorption) • Where along the shaft line you would expect flexibility (near engine/gear) versus pure solid alignment (intermediate shaft sections)

💭 Think About

• First, think about what you want BETWEEN two straight sections of line shaft: perfect rigid alignment, or some flexibility? Why? • Which of the listed coupling types is most commonly used to bolt one machined shaft end to another in a long straight run? • Which types in the list are usually used only where you join the shafting to an engine, reduction gear, or other machinery that may move slightly?

✅ Before You Answer

• Identify which options are solid couplings and which are flexible types • Ask yourself: in a long propulsion shaft tunnel, the intermediate connections are usually flanged and bolted or clamped/sleeved? Which is more standard practice? • Eliminate any coupling types that are mainly for flexible power transmission rather than rigidly keeping two shaft sections exactly in line

By what means are two sections of propulsion line shafting typically joined together?

By the use of a sleeve or clamp type solid coupling

By the use of a flange type solid coupling

By the use of a chain type flexible coupling

By the use of a gear type flexible coupling

🔍 Key Concepts

💭 Think About

✅ Before You Answer