Question 388Steam Plants - Assistant Engineer70% to pass
Normally a boiler water sample should be taken _______________.
AI Explanation
The correct answer is A) before the boiler has been blown down or chemicals added.
The reasoning for this is that a boiler water sample should be taken before the boiler has been blown down or chemicals added in order to get an accurate representation of the boiler's water condition. Blowing down the boiler or adding chemicals would alter the water composition, so taking a sample beforehand provides the most reliable data for evaluating the boiler's water quality.
The other options are incorrect because B) sampling from the highest point in the feed system would not necessarily represent the boiler water, C) taking a sample after refilling with makeup water would not show the true condition of the boiler water, and D) taking a sample after blowing down the boiler would not provide the baseline information needed to properly assess the water condition.
Related Questions
#386 Testing boiler water for chloride content will indicate the amount of _______________.#387 A dissolved oxygen concentration of 8.0 ppm represents _______________.#389 A sample of boiler water can be chemically tested for alkalinity by initially adding a few drops of phenolphthalein and then slowly titrating the water sample until the _______________.#390 What boiler water chemistry is necessary to ensure the precipitation of hard scale forming calcium? #391 A boiler water sample being collected for analysis should be circulated through a cooling coil because _______________.