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10 Cards in this Set
- Front
- Back
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What is the odor detection limit of chlorine gas?
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0.3 ppm
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What is a cathode?
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negative pole of an electrolytic cell or system
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The least reactive metals are called
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cathodic metals
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Unless water cooled, the operating temperature of a mechanical seal in a pump should never exceed
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160 degrees F
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What term describes the condition that exists when the source of the water supply is below the centerline of the pump?
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suction lift
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All occupied trenches 4 or more feet deep must provide exits at
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25 feet intervals
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What is the difference between a weak acid and a strong acid?
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amount of hydrogen ions released
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Which one of the following is the best type of valve to use to dampen a water hammer?
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pressure relief
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Which one of the following best defines the term stray-current corrosion?
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decomposition of a material caused by an outside electric current
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A shock load of toxic wastes coming into a plant can be treated or controlled with
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coagulants or chlorine
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