Engine_2014 : Steam Plants - 1032/1951
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| What is the primary function of the water screen tubes in a "D" type marine boiler? |
| A) Generate the major portion of the steam in the boiler. |
| B) Increase the temperature of the generating tube bank. |
| C) Provide a steady supply of water to the water drum. |
| D) Protect the superheater tubes from the radiant heat of the flames in the furnace. |
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