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Quiz Chapter 6 > PreFi > Flashcards

PreFi Flashcards

1
Q

The pipes should take the shortest possible route to
the house sewer or the terminating point of the
Sanitary system
Control components such as clean-outs, traps, and
vents, should be located strategically so as to ensure
efficient circulation

A

General Rules in designing
the Sanitary system

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2
Q

Subsystems of the
Sanitary System

A

Waste Collection System
Ventilation System

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3
Q

Conveys only wastewater or liquid waster free of fecal matter

A

Waste Pipe

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4
Q

Used for ensuring the circulation of air in a plumbing system and for relieving the negative pressure exerted on trap seals

A

Vent Pipe

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5
Q

A fitting or device designed and constructed to provide, when properly vented a liquid seal which prevents the backflow of foul air or methane gas without materially affecting the flow of sewage or wastewater through it,

A

Trap

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6
Q

the vertical main of a system of soil, waste or vent pipings extending through one or more stories and extended thru the roof

A

Stack

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7
Q

any part of the piping system other than a main, riser or stack.

A

Branch

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8
Q

part of the lowest horizontal piping of a plumbing system which receives the discharges from the soil, waste and other drainage pipes inside of a building and conveys it to the house sewer outside of the building

A

House/Building Drain

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9
Q

extends from the house drain at a point ____ from the outside face of the foundation wall of a building to the junction with the street sewer or to any point of discharge, and conveying the drainage of one building site,

A

0.60 meters, House.Building Sewer

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10
Q

Use of 45 degree wye branches, combination wye - 1/8 bend branches, or other approved fittings of equivalent sweep

A

Horizontal to Horizontal change in direction

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11
Q

45 degree wye branches or other approved fittings of equivalent sweep

A

Vertical to Horizontal change in direction

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12
Q

use 45° or 60° wye branches, combination wye -1/8
bend branches, sanitary tee or sanitary tapped tee
branches, or other approved fittings of equivalent
sweeps.
No fitting having more than one inlet at the same level
shall be used (i.e., sanitary cross)
Double sanitary tees may be used when the barrel of
the fitting is at least two pipe (2) sizes larger than the
largest inlet, (pipe sizes recognized for this purpose
are 51, 64, 76, 89, 102, 114, 127, & 152 mm dia.)

A

Horizontal to vertical change in direction

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13
Q

The ____ of waste pipes or soil pipes depend of the amount of waste it carries

A

size

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14
Q

A lavatory discharges 0.47 liters/sec or 28.3 liters/min (7.5 gallons per min or 1 cu ft per min) which is equivalent to the ____

A

Fixture Unit

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15
Q

The F.U. rating of plumbing fixtures is based on the ___`

A

size of required trap

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16
Q

Maximum trap loading
fixture unit of pipe sizes
32 mm
38 mm
51 mm
76 mm
102 mm

A

1
3
4
6
8

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17
Q

Fixture unit of Discharge Capacity

Up to 0.47 L/s (up to 7.5 gpm)
0.50 to 0.95 (8 to 15 gpm)
1 to 1.89 (16 to 30 gpm)
1.95 to 3.15 (31 to 50 gpm)

A

1
2
4
6

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18
Q

Minimum slope or pitch of horizontal drainage pipe

A

2 % or 20 mm/m (1/4’’ per foot)

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19
Q

Where it is impracticable due to depth of street sewer, adverse structural features and irregular building plans, pipes 102 mm dia or larger may have a slope of not less than 1% or 10mm/m (1/8’ per foot), approved by the

A

Administrative Authority

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20
Q

Types of Permissible Traps

A

The common p-trap
The deep seal p-trap
The stand trap
The running trap
The drum trap

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21
Q

Used for lavatories, kitchen sinks, laundry tubs, and urinals

Materials commonly used for the
P-trap: nickel, chrome plated brass,
Galvanized malleable copper, & PVC.

A

the common p-trap

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22
Q

water seal is about twice the size of the common p-trap

used for extreme conditions because resealing quality is greater

A

the deep seal p-trap

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23
Q

Used for fictures such as slop sinks that are usually built low in the ground, leaving very little space for a foundation and a trap

serves as a water seal & structural support for the fixture

A

the stand trap

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24
Q

used within the line of the house drain

A

the running trap

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25
Q

has a large diameter around 0.60 m
used for fixtured that discharge large amount of water (bathtubs, shower or floor drains)

A

The drum trap

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26
Q

Traps with movable parts or concealed interior partitions
No fixtures shall be double-trapped
The S-trap

A

Types of Prohibited traps

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27
Q

predecessor of P-traps
Used before traps had to connect to a ventilation line

A

The S-trap

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28
Q

Each plumbing fixture, except those with integral traps, shall be separately trapped with an ___________

A

approved-type waterseal trap

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29
Q

Only ___ trap shall be permitted on a trap arm (portion of a fixture drain between a trap and the vent)

A

one

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30
Q

One trap, centrally located, may serve three single compartment sinks or laundry tubs or lavatories, adjacent to each other and in the same room, where their waste outlets are not more than ____ apart

A

0.75 m

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31
Q

The ___ shall be the same size as the trap arm to which it is connected

A

trap

32
Q

Each fixture trap shall have a trap seal of water of not less than ___ mm and not more than ___ (except where a deeper seal is found necessary by the Administrative Authority for special conditions)

A

51 mm, 102 mm

33
Q

Minimum sizes of traps for common plumbing fixtures for the ff fixtures:

Bathtubs
Bidets
Floor Drains
Shower, single stall

A

38 - 2
38 - 2
51 - 2
51 - 2

34
Q

Minimum sizes of traps for common plumbing fixtures for the ff fixtures:

Sink (residential)
Urinal, wall mounted, integral trap
Wash Basin (single)
Water closet (private installation)
Water closet (public installation)

A

38 - 2
51 - 3
32 - 1
76 - 4
76 - 6

35
Q

The vertical distance between a fixture outlet talpiece and the trap weir shall not exceed ____ in length

A

0.60 m

36
Q

Horizontal Distance of Trap Arms
Determine their distances to vent
Trap arm Diameter
32
38
51
76
102 mm and larger

A

0.76
1.07
1.52
1.83
3.05

37
Q

The developed lenggth of the trap arm (measured from the top of closet ring to inner edge of vent) of a water closet or similar fixture shall not exceed ___

A

1.8 m

38
Q

From trap arm 76 mm dia or longer, a cleanout is required for a change of direction of greater than ___

A

22 1/2

39
Q

a device designed and installed to separate ad retain deleterious, hazardous or undesirable matters from normal wastes and permits normal sewage or liquid wastes to discharge into the disposal terminal by gravity

A

interceptors

40
Q

Interceptors shall have a water seal of not less than ___ mm deep

A

152

41
Q

Each interceptor shall be properly vented.

A

true

42
Q

Slaughterhouses, packing establishments, and any
establishment which discharges wastewater with
considerable amount of grease, hairs, feathers , etc. shall
drain through a screening device and thence into a grease
interceptor.

A

true

43
Q

Auto wash racks and/or floor or slabs used for cleaning
machinery or machine parts shall be adequately protected
against storm or surface water and shall drain into an
interceptor which will separate oil and grease before the
effluent reaches the public stream.

A

true

44
Q

Clean-outs required

A

at the upper terminal of every horizontal sewer or waste line

45
Q

at each run of piping more than ____ in total _______

A

15 meters (50 feet) , developed length

46
Q

at every __ of total developed length or a fraction thereof

A

15 m (50 ft)

47
Q

additional clean-out shall be provided on a horizontal line with an aggregate offset angle exceeding __

A

135

48
Q

inside the building near the connection between the building drain and the building sewer or installed outside the building at the lower end of the building drain extended to grade

A

true

49
Q

on a horizontal drain less than ___ in lenth unless such line is serving sinks or urinals
on short horizontal drainage pipe installed at a slope of ___ or less from the vertical line (or at an angle of 1/5 bend)

A

1.5 m
72 degree

50
Q

Size of Clean-outs

38
51
64
76
102 mm and larger

A

Size - Threads per 25.4mm
38 11-1/2
38 11-1/2
64 8
64 8
89 8

51
Q

each __ shall be installed so it open with the direction of flow or at right angles to the direction of flow except in the case of wye branch

A

clean-out

52
Q

Each ___ clean-out extension shall be constructed from a wye fitting or an approved fitting of equivalent sweep

A

90

53
Q

Each clean-out ___ shall have a front clearance of not less than 305 mm; those ___ shall have a front clearance of 450 mm

A

51 mm or less, 51 mm or more

54
Q

Clean-outs in underfloor piping shall be extended to or above finish floor or shall be extended outside the building when there is _____ or ________ to the means of access

A

less than 450 mm vertical clearance or 750 horizontal clearance

55
Q

No underfloor clean-out for residential occupancies shall be located more than ___ from an access door, trap door or crawl hole

A

6.1 m

56
Q

Portion of the drainage pipe installation intended to maintain a balanced atmosphetic pressure inside the system

A

Ventilation

57
Q

a pipe or opening used for ensuring the circulation of air in plumbing system and for relieving the negative pressure exerted in trap seals

A

Vent Pipe

58
Q

the backbone of the entire sanitary system

A

Main soil and waste vent

59
Q

the portion penetrating the roof

A

Vent Stack Through Roof

60
Q

the principal artery of the venting system to which vent branches are connected
aka Collecting Vent Line
serves as support to the main soil and waste vent

A

main vent

61
Q

a pipe installed to vent a fixture trap, that connects with the vent system above the fixture served or terminates in the open air

A

Individual Vent or Back Vent

62
Q

an arrangement of venting so installed that one vent pipe serve two (2) traps

A

Unit, Common, or Dual Vent

63
Q

a vertical vent line that provides additional circulation of air between the drainage and vent systems or to act as an auxiliary vent on a specilly designed system such as a yoke vent connection between the soil and vent stacks

A

Relief Vent

64
Q

a pipe connecting upward from a soil or waste stack below the floor and below horizontal connection to an adjacent vent stack at a point above the floor and higher than the highest spill level of fixtures for preventing pressure changes in the stacks

A

Yoke or By-pass Vent

65
Q

A group vent pipe which starts in front of the extreme (highest) fixture connection on a horizontal branch and connects to the vent stack
Aka Loop vent
Serves a battery of fixtures

A

Circuit Vent

66
Q

A vertical vent connection on a horizontal soil or waste pipe branch at a point downstream of the last fixture connection and turning to a horizontal line above the highest overflow level of the highest fixture connected there

used in spaces without partitions

A

Looped Vent

67
Q

That portion of a vent pipe through which wastewater also flows through

A

Wet Vent

68
Q

a pipe or shaft ro convey foul air from a plumbing fixture or a room to the outer air

A

Local Vent

69
Q

a vent that does not carry liquid or water-borne wastes

A

Dry vent

70
Q

the extension of a soil or waste stack above the highest horizontal drain connected to the stack

A

Stack Vent

71
Q

the vertical vent pipe installed primarily for providing circulation of air to and from any part of the soil, waste of the drainage system. The uppermost end above the roof has traditionally been referred to as Vent Stack Through Roof (VSTR)

A

Vent Stack

72
Q

Each trap shall be protected againest siphonage and back-pressure through venting

A

Vents Required

73
Q

on a primary settling tank interceptor which discharges through a horizontal indirect waste pipe into a secondary interceptor. The secondary interceptor shall be properly trapped and vented

Traps serving sinks in an island bar counter. Such sink shall discharge by means of an approved indirect waste pipe into a floor sink or other approved type receptor.

A

NOT REQUIRED

74
Q

The sizes of vent piping shall be determined from its length and the total number of fixture units connected thereto.

A

true

75
Q

The diameter of an individual vent shall not be less than ___ nor less in size than one-hal the diameter of the drain to which it is connected

A

32

Quiz Chapter 6 (5 decks)

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