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CSLB Trade > Septic Tanks and Drainfeilds > Flashcards

Septic Tanks and Drainfeilds Flashcards

1
Q

in order to determine the absorption qualities of soils for a proposed disposal field, code requires that the proposed site be:

A

subjected to a percolation test

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2
Q

the minimum sidewall of a seepage pit shall be at least

A

10 feet below the inlet

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3
Q

what is the minimum gallon capacity for a septic tank

A

750 gallons

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4
Q

the minimum liquid capacity of a septic tank serving 2 bedrooms 3 bath residence is

A

750 gallons

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5
Q

effluent or drainage from a home clothes washing machine may be disposed of by drainign

A

through a sanitary system connected to a septic tank

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6
Q

no cesspool, septic tank, seepage pit or drainfield shall be connected to any public sewer or to any building sewer leading to such public sewer (T/F)

A

true

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7
Q

a four inch concrete pad shall be poured around the well casing and shall extend ____ inches on all sides

A

18

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8
Q

maximum length of a single tile drainfield lateral shall be ____ feet

A

100

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9
Q

where distribution drain lines in leaching beds are used, the maximum distance between centers of distribution lines shall not exceed:

A

6 feet

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10
Q

where distribution drain lines in leaching beds are used, the minimum distance between centers of distribution lines shall not exceed

A

4 feet

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11
Q

a cesspool is 48 inches in diameter and 20 feet deep. if filled to the top with water the volume in gallons would most nearly be

A

1880

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12
Q

according to code, a septic tank cannot be installedcloser than ____ feet to the building water supply service.

A

5 feet

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13
Q

the liquid capacity of all septic tanks for dwelling units is determined by the number of

A

bedrooms

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14
Q

a septic tank for a 4 bedroom house must have a capacity of at least ____ gallons

A

1200

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15
Q

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

A

ten ton truck

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16
Q

the minimum distance from a drainfeild to a basement wall shall be ____ feet

A

8

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17
Q

the minimum air space within a septic tank is

A

9 inches

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18
Q

residential septic tanks

A

shall be rectangualr in shap

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19
Q

the disposal feild line is sized by what

A

-septic tank size
-type of soil
-waste flow rate

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20
Q

a concrete septic tank shall be protected from corrosion by bituminous coating extending ____ inches below the water line

A

4

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21
Q

the minimum size hydropneumatic tank for a single family residence shall be

A

42 gallons

22
Q

a disposal well for roof water shall be precceded by

A

a settling tank

23
Q

what should be installed in a septic tank to reduce the scum agitation

A

baffle

24
Q

when would a septic tank require cleaning

A

when the sludge is 1/4 the depth of the tank

25
Q

when would be the best time to inspect a septic tank

A

durring periods of high flow

26
Q

which of the following will not be reduced to a liquid form in a spetic tank

A

mineral substance

27
Q

a cubic foot of water contains

A

7.48 gallons

28
Q

a rectangular tank 4 feet long, 2 feet wide and 2 feet deep would contain ____ cubic feet

A

16

29
Q

a rectangular tank 4 feet long, 2 feet wide and 2 feet deep would contain approximatley ____ gallons of water

A

119.7

30
Q

which type of bacteria breaks down to liquids in a septic tank

A

anaerobic

31
Q

how are required residential septic tanks sizes determined?

A

by the number of bedrooms

32
Q

in a disposal feild, approved drainage pipe must be laid in a trench that has a minimum width of ____ inches. The maximum width is ____ inches

A

18-36

33
Q

in a disposal field, approved drainage pipe must be laid in a trench that is near level. The maximum slope in 100’ is ____ inches

A

3

34
Q

in a disposal field, approved drainage pipe must be laid over ____ inches clean stone gravel, slag or similar material. There, then, must be a minimum of ____ inches of filter material over the drain line

A

12
2

35
Q

a disposal feild must have minimum distance of seperation of seperation from a soakage pit of ____ feet.

A

5

36
Q

a disposal field must have a minimum earth cover of ____ inches

A

12

37
Q

a disposal field must have a minimum distance of seperation from a basement wall or terraced area of ____ feet.

A

8

38
Q

Blank

A

8

39
Q

disposal fields must not be located within ____ feet of property lines other than public streets, alleys or sidewalks.

A

5

40
Q

Disposal fields must not be located within ____ feet of water supply lines

A

5

41
Q

disposal fields must not be located under any building or within ____ feet of any building

A

5

42
Q

disposal fields must not be located within ____ feet of any provate water supply well whcih provides water for human consumption, bathing, or swiming

A

100

43
Q

the septic tank cannot be located within ____ feet of a provate water supply well which provides water for human consumption, bathing or swimming

A

50

44
Q

the septic tank cannot be located under or within ____ feet of any building

A

5

45
Q

the septic tank cannot be located within ___ feet of any building

A

5

46
Q

The septic tank cannot be located within ____ feet of the shore line of open bodies of water

A

50

47
Q

the septic tank cannot be located within ____ feet of property lines other than public streets, alleys or sidewalks.

A

5

48
Q

access to each esptic tank shall be provided by at least two manholes ____ inches in minimum dimensions

A

20

49
Q

the inlet and outlet pipe or baffle of a septic tank shall extend ____ above and at least ____ below the water surface

A

4”
12”

50
Q

All septic tank covers shall be capable of supporting an earth load of not less than ____ pounds per sq foot

A

300

51
Q

the minimum wall thickness of any steel septic tank shall be ____ and each such tank shall be protected from corrosion both externally and internally

A

12 gauge

52
Q

if you are a contractor and you discover a septic tank in the ground, what agency do you contact or do you just dig around it

A

building department

CSLB Trade (22 decks)

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