Chemical Reaction Quiz
.
- 1.Which water source is generally clear, cool, low in organic material, and frequently hard?
- A.
Lake
- B.
Pond
- C.
Spring
- D.
Stream
- 2.A lake surface water source, with considerable self-purification, is similar to which other type of surface water source?
- A.
Pond
- B.
Spring
- C.
Ground
- D.
Stream
- 3.Suspended matter of any nature present in water is
- A.
Hardness
- B.
Turbidity
- C.
Organic matter
- D.
Dissolved solids
- 4.Which impurity is used to determine the cycles of concentration (COC)?
- A.
Free mineral acids
- B.
Carbon dioxide
- C.
Turbidityoxide
- D.
Chloride
- 5.The presence of hydrogen ions causes a solution to be
- A.
Turbid.
- B.
Acidic.
- C.
Neutral.
- D.
Alkaline.
- 6.A pH of 5 in a water system, such as a boiler, aids in the development of
- A.
Foam
- B.
Scale
- C.
Corrosion
- D.
Hydroxides
- 7.Which items has no bearing on the formation of scale?
- A.
Iron
- B.
Hardness
- C.
Alkalinity
- D.
Temperature
- 8.Which of the types of alkalinity will not cause scale?
- A.
Ionic alkalinity
- B.
Carbonate alkalinity
- C.
Hydroxide alkalinity
- D.
Bicarbonate alkalinity
- 9.Corrosion caused by acid produced by carbon dioxide usually shows up as
- A.
Pitting along the bottom of the piping.
- B.
Grooves along the bottom of the piping.
- C.
Pitting on the entire surface of the piping.
- D.
Grooves on the entire surface of the piping.
- 10.The clarification process is used to remove
- A.
All silica from feedwater
- B.
Calcium and magnesium
- C.
Suspended impuritiesm
- D.
Dissolved solids
- 11.The process of chemically separating one substance out in solid form from a solution describes what water treatment process?
- A.
Filtration.
- B.
Clarification.
- C.
Sedimentation.
- D.
Chemical precipitation.
- 12.Which external water softening treatment process relies on a temperature of 212° F to remove hardness from system water?
- A.
Cold lime soda
- B.
Hot lime soda
- C.
Sodium zeolite water
- D.
Hydrogen zeolite water
- 13.What external water softening treatment process uses acid to help remove hardness from water?
- A.
Hot lime soda
- B.
Cold lime sodap
- C.
Sodium zeolitep
- D.
Hydrogen zeolite
- 14.During the external treatment of water to be used in a mechanical system, aeration is used to
- A.
Increase the CO2 level
- B.
Remove the CO2 level
- C.
Increase the CO level
- D.
Remove the CO level
- 15.How much of theinitial free oxygen can be removed by heating the boiler feedwater to the saturation temperature?
- A.
80 to 85 percent
- B.
85 to 90 percent
- C.
90 to 95 percent
- D.
95 to 100 percent
- 16.Which test should you use to make sure proper regeneration solution of the sodium zeolite softener?
- A.
Total hardness
- B.
Dissolved iron
- C.
Diluted acid
- D.
Brine
- 17.In a cooling system, what is necessary for algae to grow?
- A.
Water, heat, and air
- B.
Air, light, and water
- C.
Heat, light, and water
- D.
Air, light, and minerals
- 18.Crevice corrosion occurs when a solution contains varying amounts of dissolved
- A.
Magnesium.
- B.
Oxygen.
- C.
Nitrogen.
- D.
Calcium.
- 19.What item is particularly useful in monitoring the effectiveness of a chemical corrosion control program?
- A.
Corrosion test coupon
- B.
Corrosion cell
- C.
Electrolytes
- D.
COC
- 20.What item is particularly useful in monitoring the effectiveness of a chemical corrosion control program?
- A.
Acidic corrosion
- B.
The formation of scale
- C.
Caustic boiler seam cracks
- D.
Low levels of sludge formation
- 21.What type carryover is caused by high concentrations of alkalinity, dissolved solids, or suspended solids?
- A.
Mist.
- B.
Silica.
- C.
Priming.
- D.
Foaming.
- 22.When are water samples drawn from an operating boiler?
- A.
As soon as possible after bottom blowdown.
- B.
As soon as possible after adding chemicals.
- C.
Before firing the boiler for the first time.
- D.
Before chemicals are added or before regular blow down is accomplished.
- 23.The solenoid valve on the blowdown line of a cooling tower is energized when the
- A.
PH reaches 5
- B.
PH reaches 9
- C.
Water’s conductivity exceeds the meter setting
- D.
Water’s conductivity drops below the meter setting
- 24.Who on the base must approve the use of a new chemical or the disposal of waste water?
- A.
Base civil engineer and shop supervisor
- B.
Base commander and base civil engineer
- C.
Bioenvironmental engineer and base commander
- D.
Environmental engineer and bioenvironmental engineer
- 25.What type solution is used to boil out a new boiler?
- A.
An acidic solution
- B.
An alkaline solution
- C.
A strong soap solution
- D.
A distilled water solution
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