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1. A septic tank for a four bedroom house must have a capacity of at least
_____ gallons - ANSWER 1200 gallons
2. Cast in place septic tanks located in a parking lot shall be designed to
support the anticipated load but not less than that of a - ANSWER 10
ton truck
3. The minimum distance from a drainfield to a basement wall shall ______
feet - ANSWER 8 feet
4. The minimum airspace with in a septic tank is - ANSWER 9 inches
5. Residential septic tanks - ANSWER Shall be rectangular shape
6. The Disposal field line is sized by all the following reasons except the
, Septic tank size, type of soil, waste flow rate, pipe Materials - ANSWER Pipe
materials
7. A concrete septic tank shall be protected from corrosion bituminous coating
extending ______ inches below the waterline - ANSWER 4 inches below
8. The minimum size hydropneumatic tank for a single-family residence shall
be - ANSWER 42 gallons
9. A Disposal well for roof water shall be preceded by a - ANSWER Settling
tank
10.What should be installed in a septic tank to reduce the scum agitation -
ANSWER A baffle
11.When would a septic tank require cleaning - ANSWER When the sludge
is 1/4 the depth of the tank
12.When would the best time to be to inspect a septic tank - ANSWER
During periods of high flow
13.Which of the following will not be reduced to a liquid form in a septic tank -
ANSWER Mineral substance
14.A cubic foot of water contains - ANSWER 7.48 gallons