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Quiz Chapter 6 > page 55 - 79 > Flashcards

page 55 - 79 Flashcards

1
Q

Minimum dimensions for Private sewage disposal systems

A

L = 1500 mm
W = 900 mm
D = 1200 mm

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2
Q

Design Criteria

Should show all dimensions, reinforcing, structural calculations, and such other pertinent data as needed

A

Plans

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3
Q

shall be such as to produce a clarifies effluent of acceptable standards and shall provide adequate space for sludge and scum accumulations

A

Quality of Design

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4
Q

Constructed of durable materials, not subject to excessive corrosion or decay, shall be watertight

Material: ecment (most common) or pre-fabricated cast iron

A

Materials

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5
Q

have a minimum of 2 compartments

A

Compartments

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6
Q

not less than 2/3 capacity of the total capacity of tank; not less than 2 cum liquid capacity; shall be at least 0.9 m width and 1.5 m long

Liquid depth not less than 0.6 m nor more than 1.8 m

A

First Compartment

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7
Q

Maximum capacity of 1/3 total capacity of tank; minimum of 1 cum liquid capacity

A

Secondary Compartment

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8
Q

In septic tanks having over 6 cum capacity, the secondary campartment should be not less than 1.5m in length

A

TRUE

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9
Q

Maintain a slope of ___ at the bottom of the digestion chamber to collect the sludge and make it easily accessible from the manhole

A

1:10

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10
Q

With at least two manholes, 508 mm in min dimension: one over inlet, other over outlet. Wherever first compartment exceeds 3.7 m in length an additional manhole required over the baffle wall

A

Manholes

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11
Q

Diameter size not less than the sewer pipe

A

Inlet and Outlet Pipes

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12
Q

diamter size not less than the sewer pipe nor less than 104.6 mm

A

Vertical legs of inlet and outlet pipes

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13
Q

shall extend 101.6 mm above and at least 304.8 mm below the water surface

invert od the inlet pipe shall be at a level not less than 50.8 mm above the invert of the outlet pipe

A

Length and location of inlet and outlet

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14
Q

equal to the cross sectional area of the house sewer

A

Vent Diameter

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15
Q

Side walls shall extend 228.6 mm above liquid depth

Cover of septic tank shall be at least 50.8 mm above the back vent openings

A

air space

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16
Q

an inverted fitting equivalent in size to the tank inlet, but in no case less than 104.6 mm in diameter, shall be installed in the inlet compartment side of the baffle with the bottom of the fitting placed midway in the deplth of the liquid. Wooden baffles are prohibited

A

Partition

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17
Q

Shall be capable of supporting an earth load of not less than 14.4 kPa

A

Structure

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18
Q

The capacity if septic tanks is determined by the number of bedrooms or apartment units in dwelling occupancies; by the estimated waste.sewage design flow rate for various building occupancies; or by the number of fixture units of all plumbing fixtures; whichever is greater

A

Capacity

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19
Q

Should not be located underneath the house

At least 15 meters from the water distribution system

A

Location

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20
Q

3 degrees or grades of waste water

A

Grey Water (or Area Water)
Black Water
Storm Water

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21
Q

Waste water with the exception of human wastes

From laundries, was basins, sinks, tubs, etc.

A

Grey Water or Area Water

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22
Q

WAter plus solid and liquid human wastes

A

Black water

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23
Q

Rainwater only

A

Storm Water

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24
Q

Classification of Sewers

A

Combination Public Sewers
Storm Sewers
Sanitary Sewers

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25
Q

Oldest variety
Carries both storm and sanitary wastes

A

Combination Public Sewers

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26
Q

Carries regular sanitary wastes only
Terminates in a modern sewage disposal plant for treatment
Built at a depth of 3 meters (tributaries)

A

Sanitary Sewers

27
Q

Two types of Sanitary Sewers

A

Tributary and Intercepting Sewers

28
Q

Termination points of individual units or structures

Usually round shaped, with diameters between 0.60 to 1.2 meters

A

Tributary Sewers

29
Q

Made of vitrifies clay or cement pipes, often installed by the curb line, before the street

Normally laid in the Northern or Eastern side of streets with east-west or north-south orientation

A

Tributary Sewers

30
Q

Aka collecting sewers

Termination points of tributary sewers

Placed much lower in the ground, from 4 to 30 meters in depth

Varies in shape but have a diameter or effective opening ranging from 0.60 to 3 meters

A

Intercepting Sewers

31
Q

Slope at an angle of 1:50 or 2%

Lifting stations are placed at certain intervals and pumps or sewage ejectors are used to lift the waste, sewers terminate at the disposal plant

A

Intercepting Sewers

32
Q

____ of all building shall be connected to the public sewer. When not available, they shall be connected to an approved private sewage disposal system

A

Drainage Pipes

33
Q

Public sewer may be considered as not being available if it
is _____ from any proposed building or
exterior drainage facility

A

more than 61 meters

34
Q

It is unlawful to discharge any ashes, cinders, solids, rags,
flammable, poisonous, explosive liquids or gases, oils,
grease, and other things whatsoever which would cause
damage to the public sewer or private disposal system.

A

True

35
Q

No rain, surface or subsurface waters shall discharge into
any excreta drainage system

A

True

36
Q

No cesspool and septic tank effluents, seepage pit or under
drain system shall be connected to the excreta _____ leading to a public sewer main

A

building sewer

37
Q

No commercial food waste grinder shall be connected to a
private or public sewage disposal system.

A

True

38
Q

The minimum size of any building sewer shall be
determined on the basis of the total number of fixture units
drained by such sewer. No building sewer shall be smaller
than _____ diameter nor less in size than the building
drain

A

150 mm

39
Q

Building sewers shall be run in practical alignment at a
uniform slope of __ toward the
point of disposal

A

not less than 2% or 21 mm/m

40
Q

When impractical due to depth of street sewer,
structural features or to adverse arrangement of building, to
obtain a slope of ____ in dia
may have a slope of not less than 1% (10.5 mm/m) and
those 203 mm dia and larger may have a slope of not less
than 0.5% (5.3 mm/m)

A

2%, sewers 102 mm and 152 mm

41
Q

No building sewer shall be
installed _____
from the outer face of any
building foundation, nor
less than 0.3 M below the
finish surface of the ground.

A

less than 0.6 M

42
Q

Location of building sewer in relation to other services is
shown below.

_____from any building or structure

A

0.60m

43
Q

Location of building sewer in relation to other services is
shown below.

_____ from water supply wells

A

15.2 m

44
Q

Location of building sewer in relation to other services is
shown below.

_____from streams

A

15.2 m

45
Q

Location of building sewer in relation to other services is
shown below.

_____from domestuc supply pipes

A

0.30m

46
Q

Location of building sewer in relation to other services is
shown below.

_____from public water main

A

0.30m

47
Q

Building sewer or drainage pipe of clay or materials which
are not approved for use within a building shall not be laid in
the same trench as water pipes unless:
the bottom of the water pipe is ____
above the top of the sewer pipe
(NPC 1208.1.1),

A

0.3 m

48
Q

Building sewer or drainage pipe of clay or materials which
are not approved for use within a building shall not be laid in
the same trench as water pipes unless:

the water pipe is placed
on a solid shelf excavated
at one side of the common
trench with a minimum
horizontal distance of at
least ___ from the sewer
or drain pipe

A

0.3 m

49
Q

____ shall be installed not less than 3
meters away from sewer line in both directions.

A

Water pipe joint

50
Q

Private sewage disposal system common in rural areas for structures with arge adjacent open fields

A

Disposal Fields

51
Q

dependent on the required septic tank capacity or estimated
sewage flow rate, whichever is greater, and;
the type of soil found in the excavation.

A

Area

52
Q

No excavation for leach bed shall extend within 1.5 m of the
water table.

A

Distance from Water Table

53
Q

Filter material in the trenches shall terminate 1.5 m from pit
excavation and the pipe extending from such points to the
seepage pit shall be watertight

A

With Seepage Pit

54
Q

Filter material in the trenches shall terminate 1.5 m from pit
excavation and the pipe extending from such points to the
seepage pit shall be watertight

A

Seepage Pits

55
Q

based on the quantity of liquid waste and on the character
and porosity of the surrounding soil.

A

Capacity

56
Q

based on the quantity of liquid waste and on the character
and porosity of the surrounding soil.

A

Size of Seepage Pit

57
Q

Brick lining shall have a minimum
compressive strength of 17225 kPa.

A

Strength

58
Q

served through a distribution
box or shall be connected in
series by means of a watertight
connection. The outlet shall
have a vented leg fitting extending
304.8 mm below the inlet fitting.

A

Multiple Seepage Pits

59
Q

a non-watertight lined
excavation in the ground
which receives the discharge
of a sanitary drainage system,
designed to retain the organic
matter but permitting the liquid
to seep through the pit bottom
and sides

A

Cesspools

60
Q

Temporary expedient pending the construction of a public
sewer, so long as it is established that a public sewer will be
available in less than 2 years

A

Temporary Permits

61
Q

oldest form of disposal of
organic waste. Consists of a vault
constructed of concrete for the collection
of raw sewage and a wooden shelter

A

Outside Privy

62
Q

When liquid wastes containing excessive amounts of
grease, garbage, flammable wastes, sand, or other
ingredients which may affect the operation of a private
sewage disposal system, an ___ for such waste shall
be installed.

A

interceptor

63
Q

Waste from interceptors may be discharged to a septic tank
or other primary system or into a

A

separate disposal system

Quiz Chapter 6 (5 decks)

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