🔍 Key Concepts

• Hydraulic starting systems used on some medium and large diesel engines • The type of hydraulic pump/motor design that can convert high-pressure oil into rotational motion • Differences between gear, piston, and turbine style drives in terms of how they handle high pressure oil

💭 Think About

• Which of these choices is commonly used as a compact, high-torque hydraulic motor that can be directly connected to an engine’s flywheel or ring gear? • Think about which design is built around several pistons acting against a slanted plate to turn a shaft—does any option’s name hint at that? • Which options sound more like purely mechanical devices (not hydraulic) versus something that is normally driven by pressurized fluid?

✅ Before You Answer

• Match the choice to a known hydraulic motor type rather than a mechanical gear or clutch type • Ask yourself: which design is normally associated with high-pressure hydraulic systems in industrial or marine use? • Eliminate any options that are not typically described as a hydraulic motor in engineering texts or manuals