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19 Cards in this Set
- Front
- Back
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The rotating part of a centrifugal pump is called the? A-rotar B-Impeller C-Propeller D-Incisor |
B-Impeller |
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Chlorine in a dry form is called? A - Hypochlorite B - Hypocholrous C - Hydrochlorite D - Hydroxide |
A - Hypochlorite |
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When disinfecting a new pipe with calcium hypochlorite tables or granules, what should the chlorine be? - 10 mg/l - 25mg/l - 20 mg/l - 30 mg/l |
25mg/l |
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When water temperature increases, the effectiveness of chlorine... - doesn't change - affects other chemicals - is less effective - is more effective |
Is mor effective |
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Head is measured in? - absolute pressure - gauge pressure - feet - foot pounds |
Feet |
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During the night, algae causes the pH of water to:
Increase or decrease? |
Decrease |
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What does the Alkalinity of water imdicate? - ability of water to form flocs - capacity of water to neutralize acids - particle removal effectiveness - pH of a water |
Capacity of water to neutralize acids |
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Carbon dioxide in water will? - decrease turbidity Carbon dioxide in water will?- decrease turbidity - decrease algae growth- lowers pH- increases pH Carbon dioxide in water will?- decrease turbidity - decrease algae growth- lowers pH- increases pH Carbon dioxide in water will?- decrease turbidity - decrease algae growth- lowers pH- increases pH - decrease algae growth - lowers pH - increases pH |
Lowers pH |
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Wear rings are installed in a pump to -hold the shaft in position -keep the impeller in place -keep water concentrated on economically replaceable parts -wear out the sleeve |
Keep wear concentrated on economically replaceable parts |
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The total coliform rule is based first on -presence or absence of coliform in a sample -density of coliform in a sample -type of coliform in a sample -presence of fecal coliform |
Presence or absence of coliform in a sample |
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The water table refers to -pumping water level in a well -upper surface of the ground water -aquifer depth -water level in the revision |
Upper surface of the ground water |
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The water table refers to? - pumping water level - upper surface of the ground water - aquifer depth - water level in the revision |
Upper surface of the ground water |
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The total coliform rule is based first on : -presence or absence of coliform in a sample - density of coliform in a sample - type of coliform in a sample - presence of fecal coliform in a sample |
Presence or absence of coliform in a sample |
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Chlorine in a dry form is called |
-hypochlorite -hypochlorous -hydrochlorite -hydroxide |
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Which assembly holds the lantern ring and packing? -shaft assembly -casing ring assembly -packing gland casing-stuffing box gland casing-stuffing box |
Stuffing box |
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Tastes and odors in surface water are most often cause by? - Clays - hardness - algae - coliform bacteria |
Algae |
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Trihalomethanes are caused by the mixing of chlorine and ? -organic matter -HAA5'S -inorganic matters -organic chemicals |
Organic matter |
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The proper concentration for fluoride in drinking water is determined by? - avg annual air temp - avg annual water temp - avg Alkalinity - avg pH |
Avg Annual air temperature |
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The avg amount of water used per person per day is? * 25-30 gpd * 50-60 gpd * 75-100 gpd * 80-100 gpd |
80-100 gpd |
