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| 1. Which water source is generally clear,cool, low in oranic material, and frequently hard? |
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| 2. A lake surface water source, with considerable self-purification, is similiar to which other type of surface water source? |
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| 3. Suspended matter of any nature present in water is.... |
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| 4. Which impurity is used to determine the cycles of concentration? |
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5. The presence of hydrogen ions causes a solution to be...
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| A PH of 5 in a water system, such as a boiler, aids in the formation of... |
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| 7. Which items has no bearing on the formation of scale |
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| 8. Which of the types of alkalinity will not cause scale? |
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| 9. Corrosion caused by acid produced by carbon dioxide usually shows up as... |
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| B. grooves along the bottom of the piping. |
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| 10. The clarification process is used to remove... |
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| 11. The process of chemically seperating one substance out in solid form from a solution describes what water treatment process? |
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| D. chemical precipitation |
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| 12. Which external water softening treatment process relies on a temperature of 212*F to remove hardness from system water |
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| 13. What external water softening treatment uses acid to help remove hardness from water? |
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| 14. during the external treatment of water in a mechanical system, aeration is used to... |
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| 15. how much of the initial free oxygen can be removed by heating the boiler feedwater to the saturation temperature? |
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| 16. Which test should you use to make sure proper regeneration solution of the sodium zeolite softener? |
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| 17. In a cooling system, what is necessary for algae to grow? |
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| 18. crevice corrosion occurs when a solution contains varrying amounts of dissolved.... |
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| 19. what item is particularly useful in monitoring the effectiveness of a chemical corrosion control program? |
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| A. Corrrosion test coupon |
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| 20. The alkalinity level of water in a steam boiler is monitored closely to prevent... |
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| C. Caustic boiler seam cracks |
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| 21. What type of carryover is caused by high concentrations of alkalinity, dissolved solids, or suspended solids? |
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| 22. When are water samples drawn from an operating boiler? |
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| D. before chemicals are added or before regular blow down is accomplished. |
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| 23. the solenoid valve on the blowdown line of a cooling tower is energized when the |
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| C. water's conductivity exceeds the meter setting |
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| 24. Who on base must approve the use of a new chemical or the disposal of waste water? |
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| D. enviromental engineer and bioenviromental engineer. |
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| 25. what type of solution is used to boil out a new boiler? |
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| 26. Which type of cleaning has replaced mechanical cleaning of process equipment? |
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| 27. The best and cheapest pH control program for cooling towers is... |
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| B. the addition of sulfuric acid. |
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| 28. When a steam boiler is being treated, what is the principal variable that causes changes in the chemical dosages? |
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| C. The amount of makeup water added. |
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| 29. Use Amines in a steam boiler to |
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| D. neutralize carbonic acid in the condensate lines |
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| 30. When adding sodium nitrite is being added to a hot or chilled water system for corrosion control, the desired pH for proper filming is |
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| 31. The chemical feeding pump is best suited for service when you wish to pump very strong corrosive chemicals is the... |
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32. An antisiphon valve is used on a chemical feed system when the chemical feed tank is
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| A. above the treated equipment |
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| 33. Which chemical feed system should you use when you wish to maintain a chemical level with very little fluctuation? |
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| 34. In which methods of chemical feeding do you add a high level of chemicals on an infrequent basis to provide the necessary "kill" effect? |
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| 35. When troubleshooting a diaphram chemical pump, you notice air in the discharge hose and suspect the valve seal rings are loose. what action should you take? |
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| C.Tighten the fittings by hand until very snug, replace the seal rings if it still leaks. |
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| 36. What problem could result from your chemicals pump's feeding into the suction side of a system recirulating pump? |
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| C. A siphoning effect causing excessive output. |
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| 37. What is the result if the length of the stroke is increased on a piston type chemical pump? |
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| D. Amount of chemical pumped increases |
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| 38. When using a bypass feeder and special chemical briquettes, how do you adjust the chemical feed rate? |
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| A. adjusting the regulating valve |
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39. Which type of chemical feed control uses a special water meter to trigger its operation?
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| D. Flow proportioning control. |
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| 40. what chemical testing system would you use on a small, noncritical system? |
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41. When mixing chemicals in a mixing tank, you should not try to attain chemical concentrations greater than
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| 42. When you dilute any acid, you should always... |
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| a. pour the acid into the water |
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| 43.What reaction, if any, should you be aware of when mixing water and caustic soda? |
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| B. Enough heat generated to boil the mixture. |
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| 44. In the event of any chemical contact with the skin, you should immediatly... |
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| C. Flush the area with water |
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| 45. What effect would dumping untreated water containing organic or nitrogen compounds have on surface waters? |
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| D. Decrease the O2 level in the water |
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| 46. All corrosion occurs when electric current flows from the |
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| 47. Which type of corrosion can be described by saying that the anodic and cathodic areas can switch back and forth? |
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| 48. Which method of cathodic protection uses a rectifier? |
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C. Impressed current system |
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| 49. What effect does to much bleedoff water have on a cooling tower systems? |
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| A. higher water and utility expenses |
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| 50. What part of an HVAC/R system can be damaged by automotive types of anitfreeze? |
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