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20 Cards in this Set
- Front
- Back
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Which type of temperature sensor uses two wires of different materials? |
Thermocouples |
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A corporation stop is used for a |
service line |
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Which type chlorine gas feeding equipment would be most appropriate for distribution systems where rechlorination is required? |
Compound-loop control gas feeder |
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Wire size is selected according to which criteria? |
Number of amperes to be carried |
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Which gas law states that the mass of a dissolved gas in a liquid is directly proportional to the pressure it exerts in the liquid at a given temperature? |
Henry's law |
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Besides providing dissolved oxygen to organisms, what's the purpose of aeration? |
Mixing of the mixed liquor |
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Bacteria in an anaerobic digester will effectively utilize |
Fats |
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And a multiple-tube fermentation method, which type of culture media is used in the confirm test? |
Green lactose bile broth |
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Which type of pipe joint is used primarily in exposed location? |
Flanged joint |
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Which type of relay is often used where local power generation is involved and on synchronous motor staters to sense when synchronizing speed is reached? |
Frequency Relay |
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The electric potential between two points is measured in |
volts |
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In general, what's the maximum practical lift of pumps? |
15 to 25 ft |
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Which element is found in all acids? |
Hydrogen |
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Which is the most common cause for pipe joint failure (leaking) in newly laid pipe? |
Not having a joint completely clean |
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Which is applied to the electrodes placed in the water of a water storage tank? |
Direct current |
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Which is becoming the most common, and is one of the least dangerous, methods of thawing a water service line? |
Hot Water |
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Which is it called when water molecules associates with ions? |
Hydration of ions |
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Acids,based, and salts lacking carbon are |
Inorganic compounds |
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What will occur if the dissolved oxygen(DO) is too low in the aeration tank at an activated sludge plant? |
Filamentous bacteria will proliferate |
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This solids treatment method uses evaporation but also requires a great deal of Labor: |
Sand drying beds |
