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35 Cards in this Set
- Front
- Back
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Phenolphthalein: 1) Prevents caustic embrittlement 2) Is put in the natural gas to give it a smell 3) Is fed to cast iron boilers 4) Turns pink or red in the presence of an alkali 5) Indicates the presence of an acid |
4) Turns pink or red in the presence of an alkali |
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The titrating agent used in water tests is called a/an: 1) Reagent 2) Amine 3) Phenolphthalein 4) Buffer 5) Indicator |
1) Reagent |
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Excess sulfite is necessary to prevent: 1) Sludging 2) Carryover 3) Acidity 4) Hardness 5) Pitting |
5) Pitting |
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Total alkalinity is measured: 1) Using methyl orange indicator and N50 sulfuric acid 2) To be sure that it is not more than 2 500 ppm 3) By using phenolphthalein and N50 sulfuric acid 4) To keep a check on the dissolved oxygen 5) To control sludge formation |
1) Using methyl orange indicator and N50 sulfuric acid |
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The methyl orange or “M” alkalinity test indicates alkalinity: 1) Caused by all dissolved impurities contributing to alkalinity 2) Due to bicarbonates only 3) Due to hydroxides only 4) Due to carbonates only 5) Due to organics only |
1) Caused by all dissolved impurities contributing to alkalinity |
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Carbon dioxide causes return line corrosion and may be: 1) Neutralized with filming amines 2) Removed in the deaerator 3) Absorbed by sodium sulfite 4) The result of bicarbonate decomposition 5) Neutralized in the boiler with sodium hydroxide |
4) The result of bicarbonate decomposition |
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The phenolphthalein or “P” alkalinity test does not indicate alkalinity due to: 1) Hydroxides 2) Bicarbonates 3) Carbonates 4) Phosphates 5) Sulfates |
2) Bicarbonates |
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Phenolphthalein is a/an: 1) Reagent 2) Indicator 3) Neutralizing agent 4) Buffer 5) Acid softener |
2) Indicator |
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With regard to feedwater treatment, “precipitate” means to: 1) Separate 2) Combine 3) Hasten 4) Disperse 5) Coagulate |
1) Separate |
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When conducting a TDS or “total dissolved solids” test, the impurity that has a high conductivity and must be neutralized is: 1) pH 2) Sodium phosphate 3) Suspended solids 4) Hydroxide alkalinity 5) Sodium chloride |
4) Hydroxide alkalinity |
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Titrating is done with: 1) Trisodium phosphate 2) An antifoam 3) A reagent 4) A zeolite 5) A titrant |
3) A reagent |
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Sodium sulfite chemical will: 1) Precipitate with calcium and magnesium 2) Prevent corrosion due to oxygen in the boiler water 3) Control foaming 4) Control return line corrosion 5) Prevent scale adhering to the tubes |
2) Prevent corrosion due to oxygen in the boiler water |
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When performing a water test, be sure that: 1. All equipment is clean and in good working order 2. Results are recorded carefully before making the test 3. Test solutions, indicators, and reagents are fresh and at full strength 4. Test reagents are filtered before use 1) 2, 3 2) 3, 4 3) 1, 3 4) 2, 4 5) 1, 2 |
3) 1, 3 |
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Alkalinity in boiler water may be due to calcium, sodium, or magnesium: 1) Hydroxides, carbonates, and bicarbonates 2) Bicarbonates 3) Hydroxides 4) Hydroxides and bicarbonates 5) Carbonates and bicarbonates |
1) Hydroxides, carbonates, and bicarbonates |
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The water in a boiler should be kept: 1) Neutral 2) At a pH of 14 3) At a pH of 7 4) Alkaline 5) Acidic |
4) Alkaline |
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To prevent scale formation, inject: 1) Amines 2) Phenolphthalein 3) Phosphates 4) Sodium chloride 5) Zeolite |
3) Phosphates |
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Two Chemicals used in pH control.
Sodium nitrate Sodium carbonate Sodium phosphate Sodium aluminate Hydrazine Sodium Sulphite Phosphates Starch Tannin Lignin Alginate Sulphite Amines Sodium hydroxide |
Phosphates Sodium hydroxide |
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Four chemicals used in scale prevention
Sodium nitrate Sodium carbonate Hydrazine Sodium Sulphite Phosphates Sodium hydroxide Starch Tannin Sodium aluminate Lignin Alginate Sodium phosphate Sulphite Amines |
Sodium hydroxide Sodium carbonate Sodium phosphate Sodium aluminate |
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Four chemicals used for sludge conditioning
Sodium nitrate Sodium carbonate Hydrazine Sodium Sulphite Phosphates Sodium hydroxide Starch Tannin Sodium aluminate Lignin Alginate Sodium phosphate Sulphite Amines |
Starch Tannin Lignin Alginate |
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Two Chemicals used in deaeration
Sodium nitrate Sodium carbonate Hydrazine Phosphates Sodium hydroxide Starch Tannin Sodium aluminate Lignin Sodium Sulphite Alginate Sodium phosphate Sulphite Amines |
Hydrazine Sodium Sulphite |
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A disadvantage of adding sodium hydroxide to the boiler is what? |
It may cause embrittlement and cracking of the boiler metal |
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Three chemicals that have been effective in preventing caustic embrittlement
Sodium nitrate Sodium carbonate Hydrazine Phosphates Sodium hydroxide Starch Tannin Sodium aluminate Lignin Sodium Sulphite Alginate Sodium phosphate Sulphite Amines |
Tannin Lignin Sodium nitrate |
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Chemicals known to prevent return line corrosion
Sodium nitrate Sodium carbonate Hydrazine Phosphates Sodium hydroxide Starch Tannin Sodium aluminate Lignin Sodium Sulphite Alginate Sodium phosphate Sulphite Amines |
Amines |
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Sample water should be reduced to a temperature of about _______ °C |
24°C |
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There needs to be an excess of _________ to ensure all oxygen is disolved.
Sodium nitrate Sodium carbonate Hydrazine Phosphates Sodium hydroxide Starch Tannin Sodium aluminate Lignin Sodium Sulphite Alginate Sodium phosphate Sulphite Amines |
Sulphite |
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In order to ensure the precipitation of scale forming materials there needs to be an excess of ____________.
Sodium nitrate Sodium carbonate Hydrazine Phosphates Sodium hydroxide Starch Tannin Sodium aluminate Lignin Sodium Sulphite Alginate Sodium phosphate Sulphite Amines |
Phosphates |
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What type of test is used to test hardness of water?
Starch Phenolphthalein Titration Stannous reagent Methyl orange Counductance Sulphuric acid Molybdate reagent Potassium-iodine-iodate |
Titration |
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What methods are used to test the alkalinity of water?
Starch Phenolphthalein Titration Stannous reagent Methyl orange Counductance Sulphuric acid Molybdate reagent Potassium-iodine-iodate |
Methyl orange Phenolphthalein |
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Alkalinity of water may be due to?
Sodium nitrate Sodium carbonate Hydrazine Phosphates Sodium hydroxide Starch Tannin Sodium aluminate Lignin Sodium Sulphite Alginate Sodium phosphate Sulphite Amines Carbonates and bicarbonates of calcium, sodium and magnesium |
hydroxide Carbonates and bicarbonates of calcium, sodium and magnesium |
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A conductivity meter measures: 1) Total alkalinity 2) Total dissolved solids 3) Hydroxide alkalinity (caustic alkalinity) 4) Hardness in parts per million or grains per gallon 5) Total suspended matter |
2) Total dissolved solids |
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The conductivity meter is used to measure the: 1) Electrolyte 2) Alkalinity 3) Voltage 4) Current 5) TDS |
5) TDS |
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Relative to internal treatment, it is customary to: 1) Treat the dissolved solids so they remain dispersed 2) Condition the dissolved solids so they do not adhere to metal 3) Filter out dissolved solids 4) Cause dissolved solids to remain in solution 5) Precipitate dissolved solids with a precipitator |
5) Precipitate dissolved solids with a precipitator |
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Chemicals are fed to a watertube boiler: 1) Prior to operating the blowoff valves 2) Into the top drum only 3) Into the bottom drum only 4) With a small centrifugal pump 5) With a small positive displacement pump |
5) With a small positive displacement pump |
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The pH of the water in the boiler: 1) Must have a value of 7 2) Is controlled with sodium hydroxide 3) Could be controlled with amines 4) Should be neutral 5) Is controlled by adding treated water |
2) Is controlled with sodium hydroxide |
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Return line corrosion can be: 1) Controlled by feeding amines 2) Controlled by adding polymers 3) Prevented by adding sodium sulfite 4) Controlled by feeding sodium bicarbonate 5) Prevented by adding sodium phosphate |
1) Controlled by feeding amines |
