3Rd Year Plumbing Venting Quiz

Front 1

how many fixtures are between a circuit vent and a relief vent, before adding an additional circuit vent?

Back 1

8

Front 2

a continuous vent is considered to be a..

Back 2

dry vent

Front 3

what is the hydraulic load for a soil or waste pipe serving as a relief vent?

Back 3

6

Front 4

what information is required to size a continuous or circuit vent?

Back 4

fixture units/developed length

Front 5

what is the maximum number of fixture units allowed on a circuit vent?

Back 5

1

or

2 if they symmetrically connected

Front 6

when connecting a fixture to a circuit vent, what is the maximum allowable fixture unit load?

Back 6

1-1/2

Front 7

what dont you count when finding the fixture unit load for a circuit vent?

Back 7

fixtures on the relief vent

Front 8

how can you determine the size of a relief vent?

Back 8

can be one size smaller than the circuit vent but no more than 2

Front 9

when must an additional circuit vent be added?

Back 9

-when there are more than 8 fixtures in between circuit vent/relief vent

-when an offset is more than 45°

Front 10

what must be done if 1-1/4 or 1-1/2 traps are installed a circuit vented branch that serves 2" or larger traps?

Back 10

must be individually vented

Front 11

what is the minimum size of a circuit vented branch if serving 1-1/4 & 1-1/2 traps?

Back 11

2"

Front 12

what is the minimum size of a circuit vented branch serving 2" or larger traps?

Back 12

3"

Front 13

when must a vent stack be installed?

Back 13

when a soil or waste stack receives discharge from more than four storeys

Front 14

what is the purpose of a vent stack?

Back 14

to reduce the probability of pressure fluctuation from surge flows that fill the stack

Front 15

how is a vent stack connected?

Back 15

to the upper end of the vent header or outside air

to

the soil or waste stack at or below the lowest pipe connection

Front 16

how many fixture units can be installed on the vent stack?

Back 16

8

Front 17

where are the fixtures located on a vent stack ?

Back 17

on the lowest story served by the vent stack

Front 18

what is the minimum size of a vent stack?

Back 18

not less than one half the size of the soil or waste stack at its base

Front 19

when must a yoke vent be added?

Back 19

when a soil or waste stack receives discharge from more than 11 stories

Front 20

when fixtures that receive discharge from 5 stories in row, what must be added?

Back 20

a yoke vent

Front 21

how many fixtures can be connected to a yoke vent?

Back 21

1

or

2 if they are connected to a sanitary tee y.

Front 22

when can you avoid using yoke vents when fixtures from more than 11 stories are being discharged?

Back 22

when a vent stack is interconnected to the soil or waste stack at each story using fixtures.

Front 23

when interconnecting at each floor instead of using a yoke vent, how must the branch be sized?

Back 23

equal in size or 2" in size.

whichever is smaller

Front 24

when must an offset relief vent be installed?

Back 24

when a soil or waste stack receives a hydraulic load of more than 100 fixtures and passes through more than 2 stories.

Front 25

how long is the offset for the stack at its base for a offset relief vent?

Back 25

1.5 M

or

5 ft

Front 26

how is a offset relief vent sized?

Back 26

one size smaller than the stack vent

Front 27

when venting a sewage sump, what size is the vent pipe?

Back 27

1 size smaller than the drain

Front 28

what is the minimum and maximum size of a vent pipe serving a sewage sump?

Back 28

2" minimum

4" maximum

Front 29

what is the size of vent serving a man hole?

Back 29

2"

Front 30

how far off should yoke vents be installed off the floor?

Back 30

1m

Front 31

how many vents are required for oil interceptors?

Back 31

2

Front 32

how far above ground must oil interceptor vents terminate?

Back 32

2 m above ground

Front 33

what is the difference in height for the two vents of a oil interceptor?

Back 33

300 mm

Front 34

how are oil interceptors sized?

Back 34

1 size smaller than the largest connected drainage pipe.

not less than 1-1/4

Front 35

wet vents that are 2" or less in size cannot exceed an offset of..

Back 35

1.2 m

Front 36

wet vents that are larger than 2" in size cannot exceed an offset of..

Back 36

2.5 m

Front 37

what is the minimum height of a vent pipe for a RV sewage dump?

Back 37

7'

Front 38

a sewage dump station will have what size of trap?

Back 38

4"

Front 39

potable water source is used to refill the water tank in the RV and is a minimum ____m or____ft distance from the sewage connection.

Back 39

7.6m

25 ft