🔍 Key Concepts

• Propeller thrust and how it moves the ship forward • How axial force from the propeller is carried along the shaft line • Which component actually pushes on the ship’s structure (hull) rather than just supporting rotation

💭 Think About

• Trace the force: the propeller pushes water, water pushes the propeller, then the force travels forward along what parts before it reaches the hull? • Which listed component is designed mainly to transmit thrust (push/pull), and which are mainly for changing direction of rotation or supporting/aligning the shaft? • Ask yourself: which single part would directly press against a fixed structure in the ship to move the hull ahead?

✅ Before You Answer

• Identify which options are types of gears (used to transmit rotary motion and change direction/speed, not primarily thrust to the hull). • Identify which option is a bearing that carries radial loads only (supports the shaft but does not take the main forward push). • Identify which option is the bearing specifically designed to take the axial (fore‑and‑aft) load from the propeller and press it into the hull structure.