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20 Cards in this Set
- Front
- Back
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Which bacterial genus includes the bacterial species that causes anthrax? |
Bacillus |
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The resistance of a material to longitudinal pulling forces before it breaks is called |
tensile strength |
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Which does beam breakage resemble? |
Shear breakage |
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Which type of pipe joint is available in both bolted and boltless flexible pipe joint designs? |
Ball and socket joint |
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Which is the term applied to all suspended matter in water? |
Turbidity |
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Which type of aerator causes aeration to occur in splash areas and can be used to oxidize iron and to partially reduce dissolved gases? |
Cascade aerator |
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Sites that require chlorine vaporizers typically have feed rates that exceed |
2,000 Ib/d |
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Backfill material for a pipe installation should contain enough______ to allow for thorough compact |
Moisture |
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Although some phase imbalance of electric motors will occur in any system, in general, it shouldn't exceed |
5% |
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The Zeta potential measure the number of excess_______found on the surface of all particular matter |
Electrons |
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Fire Insurance Underwriters recommend that no main should be a diameter less than |
6 in. |
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Ion exchange processes can typically be used for direct groundwater treatment as long as turbidity and ________ levels aren't excessive |
Iron |
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Which chemical is slaked lime? |
Ca(OH)2 |
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Low values for which water characteristic usually cause poor coagulation, flocculation, and settling? |
Water temperature |
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Sedimentation depends on |
Gravity |
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Which type of pipe joint requires a movable follower ring? |
Mechanical joint |
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Which of the following chlorine species is called HTH? |
Calcium hypochlorite |
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How much deeper below the gray line of a pipe bottom should a trench be excavated if it's being dug and a rock formation? |
6 to 9 in |
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How does hydrogen sulfide gas kill a person? |
Paralyzes the respiratory system |
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And permit entry confined space, who is responsible for terminating entries? |
Entry supervisor |
