Question 20Steam Plants - Assistant Engineer70% to pass
Which of the following chemicals is used in an Orsat apparatus to absorb carbon dioxide?
AI Explanation
The correct answer is A) Potassium hydroxide.
Potassium hydroxide (KOH) is used in an Orsat apparatus to absorb carbon dioxide (CO2) from the gas sample being analyzed. The Orsat apparatus is a device commonly used to determine the composition of flue gases, including the concentration of CO2. Potassium hydroxide has a high affinity for CO2 and will selectively remove it from the gas mixture, allowing the remaining components to be measured.
The other options are incorrect because: B) Cuprous chloride is used to absorb oxygen, not CO2; C) Pyrogallic acid is used to absorb oxygen, not CO2; and D) Potassium chromate is not typically used in an Orsat apparatus for gas analysis.
Related Questions
#18 Generally, a 12% to 14% content of carbon dioxide in boiler flue gases indicates _______________.#19 Assuming all burners are clean and the fuel oil is at the correct temperature, it is considered good practice to adjust the excess air until a light brown haze is obtained. With the aid of a chemical based flue gas analyzer, the percentage readings (not necessarily in order) should indicate _______________.#21 When burning fuel oil in a boiler, a high CO2 content is desired in the stack gas because _______________.#22 The absence of carbon monoxide in the flue gas of a boiler indicates _______________.#23 When a propulsion boiler is removed from service for an extended period, why should the firesides be thoroughly dried after water washing?