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Questions and Answers
What corrective action is required when the boiler water test result shows low conductivity?
What corrective action is required when the boiler water test result shows low conductivity?
- Add Disodium Phosphate
- Add Boiler Compound
- No action shall be done (correct)
- Perform Surface Blow
What does a boiler water pH reading equal to 7 indicate?
What does a boiler water pH reading equal to 7 indicate?
- Neutral (correct)
- Alkaline
- Acidic
- Oily
What is the term for particles of water leaving the boiler together with the steam?
What is the term for particles of water leaving the boiler together with the steam?
- Carry-Over (correct)
- Superheated
- Condensate
- Feed Water
What is the boiler water property that the phenolphthalein indicator is used to test?
What is the boiler water property that the phenolphthalein indicator is used to test?
What should be done to reduce the amount of oxygen content in the boiler water?
What should be done to reduce the amount of oxygen content in the boiler water?
What is an important factor to consider for efficient operation of a boiler?
What is an important factor to consider for efficient operation of a boiler?
What is the result of excess impurity in boiler feedwater?
What is the result of excess impurity in boiler feedwater?
What is the recommended time period to conduct water tests upon taking a water sample?
What is the recommended time period to conduct water tests upon taking a water sample?
What is measured by testing the boiler water for chloride content?
What is measured by testing the boiler water for chloride content?
Which of the following can cause heavy slagging and high temperature corrosion of the boiler tubes?
Which of the following can cause heavy slagging and high temperature corrosion of the boiler tubes?
What type of heat exchanger is used to heat the boiler feed water by means of waste gas?
What type of heat exchanger is used to heat the boiler feed water by means of waste gas?
What is the consequence of excessive feed water temperature on the feed pump of an auxiliary boiler?
What is the consequence of excessive feed water temperature on the feed pump of an auxiliary boiler?
What is the purpose of performing boiler surface blow down?
What is the purpose of performing boiler surface blow down?
Why is carbon dioxide gas dissolved in boiler water dangerous?
Why is carbon dioxide gas dissolved in boiler water dangerous?
Which element should be considered for water in a steaming auxiliary boiler to be tested daily?
Which element should be considered for water in a steaming auxiliary boiler to be tested daily?
What is the best conductor of heat in a marine boiler?
What is the best conductor of heat in a marine boiler?
What is the primary purpose of phosphate in boiler water treatment?
What is the primary purpose of phosphate in boiler water treatment?
What condition must boiler water be kept in to minimize corrosion?
What condition must boiler water be kept in to minimize corrosion?
Which of the following can cause foaming and moisture carryover in a boiler?
Which of the following can cause foaming and moisture carryover in a boiler?
What is the standard hardness value for boiler water?
What is the standard hardness value for boiler water?
What is the primary reason for blowdown in boiler water treatment?
What is the primary reason for blowdown in boiler water treatment?
What is the effect of excessive dissolved solids in boiler water?
What is the effect of excessive dissolved solids in boiler water?
What is the consequence of having a pH of zero in boiler water?
What is the consequence of having a pH of zero in boiler water?
What is the purpose of using phosphoric acid-based chemicals in boiler water treatment?
What is the purpose of using phosphoric acid-based chemicals in boiler water treatment?
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Study Notes
Boiler Water Treatment
- Low conductivity in boiler water test results require no action to be taken.
- A boiler water pH reading of 7 indicates neutral water.
- Carry-over refers to particles of water leaving the boiler with the steam.
- Phenolphthalein indicator is used to test boiler water alkalinity.
- Adding hydrazine reduces oxygen content in boiler water.
- Proper boiler water conditioning is essential for efficient boiler operation.
- Water inside a boiler is used to generate steam.
Boiler Feed Water and Cooling Systems
- High impurity levels in boiler feed water can cause scale and sludge formation, corrosion, priming, and foaming.
- It is not possible to take a sample of engine cooling water from fuel oil valves.
- Water tests should be conducted within 30 minutes of taking a sample.
Chemical Handling and Safety
- When handling chemicals, it is advisable to consult the MSDS (Material Safety Data Sheet).
- Carbon dioxide dissolved in boiler water forms carbonic acid, which attacks watersides.
Boiler Maintenance and Operation
- Surface blow down removes floating impurities from boiler water.
- Excessive feed water temperature can cause the feed pump of an auxiliary boiler to lose suction.
- Economizers are used to heat boiler feed water using waste gas.
- Using a fuel oil with high sodium chloride salts content can cause heavy slagging and high-temperature corrosion of boiler tubes.
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