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drainage > DRAINAGE WASTE VENTS > Flashcards

DRAINAGE WASTE VENTS Flashcards

1
Q

where is the Cleanout required for a 5 storey rwl _m

A

3m from the bottom

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2
Q

minimum and max length of a trap arm serving 2” shower _mm _m

A

100mm
2.4m

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3
Q

maximum temperature of a liquid that may discharge into a sanitary building drain

A

75 degrees

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4
Q

what maximum cumulative change of direction is allowable on a trap arm for a basin

A

135

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5
Q

maximum horizontal distance a vent may terminate from openable window

A

3.5m

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6
Q

what type of copper tubing is not permitted for drain and vent lines

A

K,L SOFT

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7
Q

when an additional circuit vent required on a branch

A

more than 8 fixtures (not units)

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8
Q

standard height of trap arm for lav is

A

18”

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9
Q

the size of air break shall be at least

A

1 inch or size of the fixture drain

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10
Q

A relief vent is required when more than how many fixtures units discharge past a circuit vent

A

6 fu

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11
Q

Air pressure inside a drain, waste, vent should not vary by more than

A

1” wc

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12
Q

the minimum size of an additional relief vent or circuit vent must be __ small than required size but not larger than

A

one size smaller but not larger than 2”

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13
Q

how many wet vented wc are permitted on the same soil waste pipe

A

2

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14
Q

which joining procedure is used for plastic pipe on natural gas service

A

thermal fusion

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15
Q

what is placed in cold water inlet on HWT to prevent cold water being drawn from water faucet

A

dip tube

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16
Q

cleanout serving fixture in health care facility shall be located __inch minimum above flood lvl rim

A

6”

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17
Q

which meter is 2 meters in one

A

compound

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18
Q

max distance between cleanouts on a 4” SBD _M

A

30M

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19
Q

a single trap may serve a 3 compartment sink if

A

it is one size larger than the largest outlet

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20
Q

asbestos cement DWV pipe may be used for

A

building sewer

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21
Q

what type of piping used to drain lines from a hospital laboratory

A

pyrex

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22
Q

Minimum size event serving a water closet is

A

1 1/2”

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23
Q

the vertical distance between the trap weir and dip is the

A

trap seal depth

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24
Q

drainage piping of 3” or less grade at least

A

1:50

25
Q

boiling point of water is

A

212

26
Q

how is the base inside a poured in place sanitary manhole constructed

A

channeled in direction of flow

27
Q

which joining procedure is only approved for water service below ground and outside building

A

compression fitting

28
Q

which device in a water tube boiler will direct the air to an expansion tank connection

A

bourdon tube

29
Q

every caulked lead drainage joint shall be firmly packed with ___ with depth of ___mm

A

oakum 25mm

30
Q

ready rod size t0 support 2” or less _mm

A

6mm

31
Q

ready rod size to support 4” or less __mm

A

8mm

32
Q

ready rod size to support over 4” __ mm

A

13mm

33
Q

extracted tees branch is at least __ than the tube in which tee is formed

A

one size smaller

34
Q

soil or waste stack that serves more than 6 wc shall not be less than “

A

4”

35
Q

max hydraulic load that can drain into a vent stack

A

6 fu

36
Q

minimum length of a trap arm is

A

twice its diameter

37
Q

___ joints shall not be used for hard drawn copper tube

A

flared joints

38
Q

not more than __ showers heads shall be served a by a single drain

A

6

39
Q

when a soil or waste stack other than a multi-storey wet vent receives discharge more than 11 storeys

A

yoke vent

40
Q

The temperature of water discharge into a bathtub shall not exceed __ c

A

49

41
Q

oil interceptor minimum size vent

A

1 1/4

42
Q

oil interceptor vents min distance between both outside __mm

A

300 mm

43
Q

max trap arm length for 1 1/4 _m

A

1.5m

44
Q

max trap arm length for 1 1/2 _m

A

1.8m

45
Q

max trap arm length for 2 _m

A

2.4m

46
Q

max trap arm length for 3 _M

A

3.6m

47
Q

max trap arm length for 4 _m

A

9.8m

48
Q

sump vent is 1 size smaller than drain pipe but minium size of vent is

A

2inch

49
Q

minimum size of vent stack and stack vent shall be __ the size of soil or waste stack at its bottom

A

1/2 the size

50
Q

offset dies not exceed __m for 2” or smaller and __m for larger than 2”

A

1.2 = 2” or smaller
2.5 2” larger than 2”

51
Q

number of threads for 1/16 to 1/8

A

27 tpi

52
Q

number of threads to 1/4 to 3/8

A

18

53
Q

number of threads 1” to 2”

A

11 1/2

54
Q

number of threads 4” above

A

8

55
Q

1m = ___mm

A

1000mm

56
Q

Where we use shut off on softener

A

upstream

57
Q

size of air gap

A

2x the diameter of pipe but never less than 1”

58
Q

min temp of hwt

A

60 degrees

59
Q

I

A

D

drainage (1 decks)

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