What is the purpose of the item labeled...

🔍 Key Concepts

• Look at how steam absolute pressure changes as it passes through the part labeled nozzle in the graph at the top of the illustration. • Consider what happens to steam absolute velocity in the same region of the diagram. • Think about the different roles of nozzles, fixed blades, and moving blades in a steam turbine: which one actually turns the rotor?

💭 Think About

• In the section marked nozzle, is the pressure mainly dropping, or is the velocity mainly dropping? What does that say about which type of energy is being changed? • Which component in the drawing is clearly responsible for spinning the shaft: the nozzle or the moving blades? So which component is more directly associated with mechanical energy? • If steam speeds up as it passes through a narrowing passage while pressure drops, what kind of energy is it gaining, and what kind is it losing?

✅ Before You Answer

• Verify which of the answer choices describes pressure (potential energy) changing into velocity (kinetic energy). • Confirm that the moving blades, not the nozzle, are the primary parts that convert steam energy into shaft rotation (mechanical energy). • Eliminate any option that suggests the nozzle’s main job is to slow the steam down or to increase its pressure.

What is the purpose of the item labeled "nozzle" located on the illustrated steam turbine? Illustration SE-0003

Convert the potential energy of the supply steam to kinetic energy.

Convert the potential energy of the supply steam to mechanical energy.

Convert the kinetic energy of the supply steam to potential energy.

Convert the kinetic energy of the supply steam to mechanical energy.

🔍 Key Concepts

💭 Think About

✅ Before You Answer