Question 393Steam Plants - Assistant Engineer70% to pass
Phenolphthalein is used as an indicator to test boiler water for _______________.
AI Explanation
The correct answer is C) alkalinity.
Phenolphthalein is used as an indicator to test boiler water for alkalinity. Alkalinity is a measure of the water's ability to neutralize acids, which is an important parameter in boiler water treatment to maintain the proper pH and prevent corrosion. Phenolphthalein changes color in the presence of alkaline substances, making it a suitable indicator for testing boiler water alkalinity.
The other options are incorrect because hardness (A) is measured using other indicators, chloride content (B) is not typically tested with phenolphthalein, and hydrazine (D) is a chemical used in boiler water treatment, not a parameter tested with phenolphthalein.
Related Questions
#391 A boiler water sample being collected for analysis should be circulated through a cooling coil because _______________.#392 A boiler with a water capacity of 10 tons generates steam at the rate of 30 tons per hour. If the feed water quality is 0.5 ppm, the concentration of solids will increase 1.5 ppm every hour. What would be the increase in the concentration of solids within 24 hours? #394 The amount of sodium phosphate in treated boiler water can be measured by a/an _______________.#395 If a quantity of saturated steam consists of 90 percent steam and 10 percent moisture, the quality of the mixture is _______________.#396 If a boiler generates saturated steam at 125.3 psig, how much heat is required to change the water into steam if the feed water temperature is 240°F? Illustration SG-0004