🔍 Key Concepts
• Notice the labeled parts: oil inlet, impeller, runner, and stator inside a coupling housing
• Think about how power can be transmitted through a fluid versus through friction plates, magnets, or air pressure
• Remember that some marine clutches/couplings work by circulating a liquid between rotating elements to transmit torque
💭 Think About
• Which of the four choices matches a design that uses an impeller and runner inside a housing filled through an oil inlet?
• If there are no visible friction plates, magnetic coils, or air lines, what type of power-transmission method is most likely being used?
• How would the presence of a stator between rotating elements influence whether the device works by fluid flow or by direct mechanical contact?
✅ Before You Answer
• Identify whether the working medium shown is oil, magnetic field, air, or solid friction plates
• Confirm that impeller, runner, and stator are typical components of one particular type of clutch/coupling used for smooth torque transmission
• Verify that the design allows slip between input and output shafts through the working medium rather than direct mechanical engagement