In the power plant's steam boiler, the water is first heated to the water vaporization temperature, i.e. superheated

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BlackTom AI · Accepted Answer

Question restatement: In the power plant's steam boiler, the water is first heated to the water vaporization temperature, i.e. superheated. Select one: True or False.

Option 1: True
- The statement says water is first heated to the vaporization temperature and identifies it as superheated. In boiler operation, water is typically heated from liquid to its saturation temperature (the boiling point at the boiler pressure) to produce saturated steam. Superheating occurs later, after steam leaves the boiler or after primary vapor generation, when the steam is heated further beyond the saturation temperature. Therefore, saying the water is first heated to vaporization temperature and is already superheated at that stage is inaccurate. This choice confuses saturation/boiling with superheating and misrepresents the sequence of steam generation in a boiler.

Option 2: False
- The correct interpretation is that water within the boiler is heated to its saturation temperature to form saturated steam, not to the point of being superheated. Superheating happens after the steam is formed, often in a superheater section, where the saturated steam is heated further. Hence, stating that the water is first heated to the vaporization temperature and is superheated at that initial stage is incorrect because the term 'superheated' applies to steam after vaporization, not to the water at the moment it first reaches vaporization.

Summary of reasoning across options:
- The True option incorrectly conflates the initial vaporization with superheating and does not reflect typical boiler process where saturation temperature is reached before any superheating.
- The False option correctly aligns with standard boiler operation: water reaches vaporization (boiling) to become saturated steam, and superheating occurs subsequently if the steam is heated beyond the saturation point.

Dashboard QUIZ Weekly exercise 3

In the power plant's steam boiler, the water is first heated to the water vaporization temperature, i.e. superheated

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