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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
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If there is a sizable chlorine leak, the chlorine will combine with the ammonia to form.... |
A visible white vapor (smoke) |
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If you have to shut down a chlorine system what are the steps? |
The tank valve should be closed, the yoke disconnected, and the injector left running with the auxiliary tank valve open, until any remaining chlorine gas is purged from the line |
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By increasing the chlorine dosage beyond the breakpoint, any taste and odor is usually eliminated. |
Free available chlorine residual is free from taste and odor at the concentrations commonly used in disinfection. |
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Because chlorine gas is 2.5 times as dense as air, where should the ventilation system be located? |
Because chlorine gas is heavier than air it will settle and stay near the floor so the vent should be near the floor for chlorine gas |
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How does a chlorine detector that uses electrodes work? |
Samples of air are drawn from the area being monitored and it will increase the current passing between the electrodes and that will activate the alarm. |
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C x T values are based on... |
Concentration of chlorine, contact time, pH, and temperature. |
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Which type of chlorine gas feeder is most commonly used? A) pressure B) combination water & pressure C) vacuum D) combination pressure & vacuum |
C) vacuum |
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What is an injector? |
A Venturi device that pulls chlorine gas into a passing stream of dilution water. It also creates the vacuum needed to operate the chlorinator. |
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Which device(s) uniformly disperse(s) the chlorine solution into the main flow of water? A) injectors B) pressure regulating valve C) diffusers D) effluent nozzles |
C) diffusers -bc diffusers is lengths of pipes, usually perforated, that uniformly disperses the chlorine solution into the main flow of water. |
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The pressure in a chlorine cylinder depends on the... |
The temperature of the chlorine liquid, when chlorine temp increases the pressure increases |
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What is an evaporator? |
A heating device used to convert liquid chlorine to chlorine gas. |
Chlorine |
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Removal of iron and manganese |
Granular media filters, manganese greensand filters, pleated membrane microfiltration, and membrane filtration( micro & ultra) |
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Samples to be tested for coliforms can be refrigerated for up to ____ hours before analysis, but should be done as soon as possible. |
8 hours |
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Define corrosion, scaling, and stabilization? |
Corrosion is when things are corroded, by chemical action Stabilization is the deposit build of in pipes or whatever. Stabilization is the use of chemicals to reduce corrosion. |
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Define tubercles? |
A knob of rust formed on the interior of cast iron pipes as a result of corrosion. |
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