Question 391Steam Plants - Assistant Engineer
70% to passA boiler water sample being collected for analysis should be circulated through a cooling coil because _______________.
Athe cool sample has a higher conductivity measurement and the total dissolved solids in the water are easier to identify
Bthis keeps the water from flashing into steam as it is drawn from the higher pressure of the boiler into atmospheric conditions
Cit reduces the amount of suspended matter that frequently finds its way into the dead end lines
Dthe degree of acidity as measured on the pH recorder is amplified by cool water temperatures
AI Explanation
The correct answer is B) this keeps the water from flashing into steam as it is drawn from the higher pressure of the boiler into atmospheric conditions. When a boiler water sample is drawn from the high-pressure boiler into the lower atmospheric pressure, the sudden drop in pressure can cause the hot water to rapidly convert to steam, known as "flashing." Passing the sample through a cooling coil helps to lower the temperature and prevent this flashing, allowing the sample to be safely collected for analysis. The other answer choices are incorrect because they do not address the key issue of preventing flashing during the sample collection process.
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