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Master Plumbing > Private sewage Disposal System > Flashcards

Private sewage Disposal System Flashcards

1
Q

a septic tank into the subsurface disposal field, or seepage pits

A

PRIVATE SEWAGE DISPOSAL

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2
Q

a watertight receptacle which receives discharge of a sanitary plumbing system

A

SEPTIC TANK

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3
Q

a loosely lined excavation in the ground which receives the discharge of a septic tank

A

SEEPAGE PIT

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4
Q

a non-watertight lined excavation in the ground which receives the discharge of a sanitary drainage system or part there of

A

CESSPOOL

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5
Q

a cesspool that is not watertight

A

LEECHING CESSPOOL

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6
Q

an outhouse or structure used for the deposition of excrement

A

PRIVY

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7
Q

a pit beneath a privy where excrement collects

A

PRIVY VAULT

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8
Q

_______ are conducted to determine the absorption qualities of questionable soils

A

PERCOLATION TEST

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9
Q

What are the basis of DENR in approving if the bldg sewer may be connected to private sewage disposal system?

A

Location
Soil porosity
Ground water level

(LSG)

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10
Q

PD 856

A

SANITATION CODE OF THE PHILIPPINES

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11
Q

Septic tanks design shall produce a _________

A

clarified effluent

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12
Q

What is the minimum compartments of septic tank?

A

2

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13
Q

what is the recommended minimum compartment of septic tanks by LGU’s?

A

3

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14
Q

What is the liquid depth of septic tanks?

A

0.6 m-1.8m

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15
Q

What is the minimum inlet compartment of a septic tank?

A

2/3 of the septic tank

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16
Q

What is the minimum capacity of the first compartment of a septic tank?

A

2 cu.m

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17
Q

What is the minimum width of a septic tank?

A

0.90 m

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18
Q

What is the minimum length of the first compartment of a septic tank?

A

1.5m

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19
Q

What is the maximum outlet compartment of a septic tank?

A

1/3 of the septic tank

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20
Q

What is the minimum capacity of the secondary compartment of septic tank?

A

2 cu.m

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21
Q

What is the minimum length of the secondary compartment if septic tank has over 6 cu.m capacity?

A

1.5 m

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22
Q

What is the minimum size of the inlet and outlet pipe for septic tank?

A

Same as the size of connecting sewer pipe

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23
Q

What is the minimum number of manholes of a septic tank?

A

2

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24
Q

What is the minimum dimension of a manhole?

A

508 mm

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25
Q

How many manholes are over the inlet compartment?

A

1 manhole

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26
Q

How many manholes are over the outlet compartment?

A

1

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27
Q

Add 1 more manhole above the baffle wall if the first compartment exceeds _____ in length

A

3.7 m

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28
Q

What is the vertical clearance of inlet invert pipe above outlet invert pipe for septic tank?

A

50.8 mm (2”)

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29
Q

What is the vertical clearance of the cover of the septic tank above the back vent opening?

A

50.88 mm (2”)

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30
Q

How much is the extension of inlet and outlet pipe or baffle partitions between compartments above the water surface?

A

101.6 mm (4”)

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31
Q

What is the minimum vertical leg of the inlet and outlet fitting?

A

104.6 mm (4.1”)

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32
Q

What is the minimum inverted fitting installed in the inlet compartment side of the baffle??

A

104.6 mm (4.1”)

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33
Q

What is the minimum horizontal dimension of the baffle type fitting measured at the inlet and outlet pipe inverts?

A

106.6 mm (4.2”)

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34
Q

How much is the extension of side walls above the liquid depth?

A

228.6 (9”)

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35
Q

How much is the extension of the inlet and outlet pipe or baffle below the water surface?

A

304.8 mm (12”)

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36
Q

What is the minimum earth load support of septic tank cover when the maximum coverage does not exceed 9 m?

A

14.4 kpa

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37
Q

What is the minimum bituminous coating extension below the water line for concrete septic tanks and shall cover all of the internal areas above that point?

A

101.6 mm (4”)

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38
Q

What is the minimum wall thickness of any steel septic tank?

A

Gauge 12 US (2.8mm)

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39
Q

What are prohibited septic tanks and baffles?

A

Wooden septic tanks and baffles

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40
Q

what is the minimum area of trench bottom for disposal fields?

A

14 sqm

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41
Q

what is the sidewall area of disposal fields that may be added to the trench bottom?

A

304.8 mm to 914.4 mm

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42
Q

What is the maximum depth of excavation within a water table for a leach line or leach bed?

A

1.5 m

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43
Q

what is the raking depth of trenches before placing filter materials on drain lines, to remove compacted surfaces?

A

25.4mm (1”)

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44
Q

what is the *size of clean stone, gravel, slag, or similar filter material for a disposal field?

A

19.1 mm to 63.5 mm (3/4” to 2 1/2”)

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45
Q

What are approved filter materials put above the drain pipe to prevent closure of voids with earth backfill?

A

Untreated building paper, Straw, similar porous material

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46
Q

What is staked in the trench to the depth of the filter material as support for drain tile or flexible pipe which will maintain alignment?

A

GRADE BOARD

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47
Q

How much is the termination of filter material when seepage pits are used in combination with disposal fields?

A

1.5 m

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48
Q

What is needed for two or more drain lines to receive lateral lines?

A

DISTRIBUTION BOX

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49
Q

what is required if quantity of sewage exceeds 152.4 linear meter?

A

DOSING TANK

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50
Q

What is the interval of discharge of dosing tank via automatic siphon pump?

A

3 hrs or 4 hrs

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51
Q

What is the dosing capacity of a dosing tank at one time?

A

60% to 75%

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52
Q

How many siphons or pumps required if total length of pipe exceeds 304.8 m, each serving 1/2 of the reaching field?

A

2 siphons or pumps

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53
Q

What is the minimum number of drain lines per disposal field?

A

1

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54
Q

What is the maximum length of each line of the disposal field?

A

30.5 mm

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55
Q

what is the minimum bottom width of trench for disposal field?

A

457.2 mm

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56
Q

What is the maximum bottom width of trench for disposal field?

A

914.4 mm

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57
Q

What minimum spacing of distribution lines of disposal fields, center-to-center?

A

1.8m

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58
Q

What is the minimum depth cover of line of disposal field?

A

304.8mm

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59
Q

What is the preferred depth of earth cover of lines of disposal field?

A

457.2mm

60
Q

what is the minimum grade of lines of disposal field?

A

level

61
Q

What is the maximum grade of lines of disposal field?

A

25 mm/m

62
Q

What is the minimum filter material under drain lines of disposal field?

A

304.8 mm

63
Q

What is the minimum filter material over drain lines of disposal field?

A

50.8 mm

64
Q

What is the minimum distance of Ieaching beds in a disposal field?

A

1.20 m

65
Q

What is the maximum distance of perimeter of leaching bed to a distribution drain line?

A

0.90 m

66
Q

On sloping grounds, to prevent excessive line slope, leach lines or beach beds shall be _________

A

stepped

67
Q

What is the shape of a seepage pit?

A

circular/circle/round

68
Q

What is the extension of vented leg fitting below the inlet fitting?

A

304.8 mm

69
Q

What is the minimum diameter of seepage pits?

A

2.2m

70
Q

Approval shall be obtained for excavated seepage pits with diameters greater than _________

A

1.8 m

71
Q

What is the thickness of concrete wall for seepage pits?

A

101.6 mm

72
Q

When to have chamfered matching ends of bricks on blocks for seepage pits?

A

greater than 304.8mm

73
Q

What is the minimum depth of clean 19.1 mm gravel of a rock in the excavation voids behind the brick, block, or concrete liner?

A

152.4 mm

74
Q

What is the minimum compressive strength of brick or blocks in seepage pits?

A

17225 kPa on 2500 psi

75
Q

What is the minimum sidewall of seepage pits?

A

3 m

76
Q

What is the maximum depth of excavation within a water table from a seepage pit?

A

3 m

77
Q

What is the thickness of cement mortar of the arch or dome of any seepage pit, extending to at least 152.4 mm beyond the sidewalls?

A

50.8 mm

78
Q

What is the earth load design of seepage pits?

A

19.2 kpa

79
Q

What is the depth of top or arch or cover below the surface of the ground?

A

457.2 mm-1.2 m

80
Q

What is the allowable discharge fitting when using a one or two piece concrete slab cover inlet?

A

1/4 bend fitting

81
Q

Shall be considered only as a temporary expedient pending to construction of a public sewer

A

CESSPOOL

82
Q

What is the minimum sidewall of cesspool?

A

6.1 m

83
Q

What is the vertical clearance of the inIet above the outlet when overflow cesspools or seepage pits are added to existing installations?

A

152.4 mm

84
Q

What is the clear height of tunnel above the distribution pipe?

A

0.6m

85
Q

What is the maximum length of tunnel?

A

1/2 or 2.4 m depth of trench

86
Q

trenches shall be back-filled in thin layers of _____ above the pipe with clean earth

A

0.3 m

87
Q

what is the distance within property line that every abandoned bldg shall be capped or plugged?

A

1.5 m

88
Q

What is the maximum days from connecting to the public sewer that the abandoned facility shall be filled etc.?

A

30 days

89
Q

What is the minimum horizontal distance between any part of the leaching system when disposal fields and/or seepage pits are installed in sloping ground?

A

4.6 m

90
Q

What is the clearance of drainage piping from domestic supply wells?

A

15.2 m

91
Q

What is the allowable reduction in distance when drainage piping is construction of materials approved for use within a bldg ?

A

7.6 m

92
Q

What is the waste flow rates for disposal facilities indicated with a dishwashing machine?

A

6 gallons (22.7L)

93
Q

What is the waste flow rates for disposal facilities indicated without a dishwashing machine?

A

5 gallons (18.9L)

94
Q

What is the waste flow rates for disposal facilities for single service kitchen?

A

2 gallons (7.6L)

95
Q

What is the waste flow rates for disposal facilities of a food waste disposer?

A

1 gallon (3.8L)

96
Q

What is the retention time for disposal facilities of commercial kitchen waste dishwasher?

A

2.5 hrs

97
Q

What is the retention time for disposal facilities of single service kitchen single serving?

A

1.5 hrs

98
Q

What is the retention time for disposal facilities of sand-silt-oil?

A

2 hrs

99
Q

What is the retention time for disposal facilities of lint-silt(laundry)?

A

2 hrs

100
Q

What is the storage factor for disposal facilities

A
101
Q

What is the storage factor disposal facilities for fully equipped commercial kitchen for 8 hrs?

A

1

102
Q

What is the storage factor disposal facilities for fully equipped commercial kitchen for 16 hrs?

A

2

103
Q

What is the storage factor disposal facilities for fully equipped commercial kitchen for 24 hrs?

A

3

104
Q

What is the storage factor for disposal facilities of single service kitchen?

A

1.5

105
Q

What is the storage factor for disposal facilities of self-serve auto washers?

A

1.5

106
Q

What is the storage factor for disposal facilities of employee-operated auto washers?

A

2

107
Q

What is the storage factor for disposal facilities of laundries and laundromats?

A

1.5

108
Q

The oldest type of public sewer that conveys both storm water and sanitary waste. This type is already obsolete and no longer allowed by sanitary authorities

A

COMBINATION PUBLIC SEWER

109
Q

Type of public sewer facility that carries regular sanitary wastes only. It terminates in a modern sewage dispersal plant. Rainwater is not permitted to enter.

A

SANITARY SEWER

110
Q

A type of sanitary sewer that conveys sanitary waste to a dispersal plant, commonly made of concrete pipe laid underground.

A

INTERCEPTING SEWER or TRUNK LINE SEWER

111
Q

Type of sanitary sewer classified as an intercepting sewer branch, constructed of vitrified clay or concrete pipe laid in an open trench.

A

TRIBUTARY SEWER or CONTRIBUTING SEWER

112
Q

Kind of public sewer line that carries storm water which terminates in a natural drain such as canals, lakes, or rivers

A

STORM DRAIN

113
Q

Refers to the pump that will discharge waste in the sump and transfer it to the house drain installed overhead

A

SEWAGE EJECTOR

114
Q

Refers to the semi-liquid substance that accumulates at the bottom of the septic tank

A

SLUDGE

115
Q

Refers to the parts of the solids that are formed and floating on the septic tank

A

SCUM

116
Q

What do you call the process where solid matter is reduced in sizes and consequently changed in character?

A

DIGESTION

117
Q

What are the two processes combined within the septic tank?

A

SEDIMENTATION & PUTREFACTION

118
Q

Sedimentation occurs in what portion of the septic tank?

A

Upper

119
Q

What process occurs in the upper portion of the septic tank?

A

SEDIMENTATION

120
Q

Anaerobic decomposition occurs in what portion of the septic tank?

A

Bottom

121
Q

What process happens at the bottom of the septic tank?

A

ANAEROBIC DECOMPOSITION

122
Q

What bacteria causes decomposition of organic matter from human waste, they thrive naturally in sewage?

A

Aerobic bacteria
Anaerobic bacteria
Facultative bacteria

123
Q

What bacteria within the septic tank functions in the presence of material oxygen?

A

AEROBIC BACTERIA

124
Q

What bacteria within the septic tank functions in the absence of free oxygen?

A

ANAEROBIC BACTERIA

125
Q

What bacteria within the septic tank functions with or without free oxygen?

A

FACULTATIVE BACTERIA

126
Q

The process of decomposition is regarded as _________

A

stabilization

127
Q

Refers to the decomposition caused by anaerobic bacteriaaccompanied by bad odors

A

PUTREFACTION

128
Q

Refers to the sewage that turns dark and smell unpleasantly due to anaerobic decomposition

A

SEPTIC

129
Q

What type of decomposition within the septic tank is NOT accompanied by unpleasant odor and can be accomplished with no definite time and could be within a matter of hours?

A

AEROBIC DECOMPOSITION

130
Q

What type of decomposition within the septic tank is accompanied by bad odors?

A

ANAEROBIC DECOMPOSITION

131
Q

Refers to the lighter organic materials that rises to the surface of water within the septic tank

A

SCUM

132
Q

What are the natural laws of nature that determines the effectiveness of plumbing installation?

A

Gravity
Atmospheric pressure

133
Q

Term meaning to flash or washout, to remove dirt or grease by flowing through. Also refers to self-cleaning ability

A

SCOURING

134
Q

This is sometimes referred to as the collection line of a plumbing system

A

HOUSE DRAIN

135
Q

Type of house drain that receives discharges of sanitary waste as well as storm water, already face out and no longer permitted

A

COMBINED DRAIN

136
Q

Type of house drain which receives discharges of sanitary and domestic waste only

A

SANITARY DRAIN

137
Q

Type of house drain that receives discharges from industrial equipment that contains some objectionable acid wastes

A

INDUSTRIAL DRAIN

138
Q

Type of house drain that conveys all storm clear water or surface wastewater except sanitary wastes.

A

STORM DRAIN

139
Q

A device installed in the house drain immediately inside the foundation wall of the building. It serves as a barrier and prevents the gases coming from public sewer or septic tank and circulating through the plumbing system

A

HOUSE TRAP

140
Q

What are the different gases produced inside the septic tank?

A

CH⁴
CO²
CO
H²
H²S
SO²

141
Q

Gas produced inside the septic tank which is a combination of hydrogen and carbon, a principal component of natural gas

A

CH⁴

142
Q

Gas produced inside the septic tank which is a combination of carbon and oxygen, simplest oxide of carbon

A

CO²

143
Q

Gas produced within the septic tank which is a byproduct of methane classified as poisonous gas

A

CO

144
Q

Gas produced within the septic tank which evolves as a moist gas from organic waste

A

H²

145
Q

Gas produced within the septic tank which is a colorless gas with offensive odor

A

H²S

146
Q

Gas produced within the septic tank which is a colorless gas having an irritating odor

A

SO²

Master Plumbing (15 decks)

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