As shown on the illustrated soot blower...

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Question 1 of 2066636ef128f7522a1c521932

As shown on the illustrated soot blower diagram, what item is responsible for opening and closing the steam admission poppet valve at the appropriate times during element rotation? Illustration SG-0023

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Question 1 of 20

66636ef128f7522a1c521932

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🔍 Key Concepts

• Trace the steam flow path from the inlet to the blower element and identify which part acts as the poppet valve itself versus which part operates it. • Look at how the rotating shaft and cam/gear mechanism interact with the vertical valve stem and spring in the center of the housing. • Distinguish between parts that simply guide or seal steam and the part that actually times the opening and closing during rotation.

💭 Think About

• First, identify on the diagram which numbered part is the steam admission poppet valve and which is its valve stem and spring. Once you know that, ask: what moves this valve up and down? • Follow the mechanical linkage from the rotating gear/shaft on the right side to the vertical stem in the middle. Which numbered part directly converts the rotary motion into the up‑and‑down motion of the poppet valve? • Among choices 5, 6, 7, and 11, which one is clearly shaped or positioned like a cam or operating lever rather than a sealing surface, passage, or spring?

✅ Before You Answer

• Verify which number labels the poppet valve head seated at the steam inlet, and which number labels the valve stem/spring assembly. • Confirm that the part you choose is in direct mechanical contact with the valve stem so that its movement must cause the valve to lift off and reseat. • Make sure the chosen part is associated with the rotating drive mechanism (gears/shaft) so it can control valve timing as the element rotates.

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