A convection type superheater in a D-type...

Question 1 of 270705eccefa0bacbc34ba4d46df7

A convection type superheater in a D-type boiler is protected from radiant heat by __________.

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Question 1 of 27070

Q

A convection type superheater in a D-type boiler is protected from radiant heat by __________.

🔍 Key Concepts

• Convection vs radiant superheaters in a marine D‑type boiler • How water-cooled tube screens are used near the furnace • Purpose of protecting superheater tubes from direct furnace radiation

💭 Think About

• In a D‑type boiler, where is a convection superheater located relative to the furnace flame and gas flow? • Which components in the furnace area actually have water/steam inside and can absorb or block radiant heat before it reaches the superheater? • Which option describes something whose main job could realistically be to physically "shield" the superheater from direct radiant heat?

✅ Before You Answer

• Identify which choices are physical tube elements placed between furnace and superheater. • Ask which item would be water‑cooled and therefore good at absorbing radiant heat. • Eliminate any option that is a control or process device, not a structural shield in the gas path.