060201abC Drainage And Venting Systems Part C

Question 1

Ideal flow rate through all drains and sewer piping is what

Answer 1

600mm or 2 feet per second

Question 2

How high and where should a laundry standpipe terminate

Answer 2

Minimum 2’ or 600mm and be terminated above flood level rim of the clothes washer

Question 3

Minimum drain size for laundry standpipe and should it be separately vented ?

Answer 3

2” minimum and separately vented

Question 4

Minimum height above the roof a stack should protrude through the roof

Answer 4

Minimum 6”

Question 5

What’s the minimum an emergency floor drains trap arm must be

Answer 5

Minimum 18” and must not exceed 1 pipe diameter fall

Question 6

Minimum length a water closet tram arm can move horizontally and vertically

Answer 6

3 metres horizontally and 1 metre vertically below the flange

Question 7

What are the code requirements for clean outs at the base of a stack

Answer 7

Every stack at its base or a maximum of 3 metres upstream have a cleanout

Question 8

How is continuous waste sized and the max length

Answer 8

Sized according to fixture outlet size max length is 1200mm or 1.2 m from furthered fixture outlet to the trap inlet

Question 9

What table do you use for its fixture load and maximum developed length

Answer 9

2.5.8.3

Question 10

What table must be referenced for sizing all vents. And if any discrepency in sizing this table takes precedence

Answer 10

2.5.7.1

Question 11

Ideal flow rate through any sewer line

Answer 11

2ft (600mm) per second

Question 12

Lavatory sink rough in measurements

Answer 12

Centre of sink directly behind 16-18” to construction floor

Question 13

Water closet rough in locations/ height

Answer 13

12” from back wall minimum 15” each side

Question 14

Tub rough in location

Answer 14

Centre of tub width. 2”-6” from back wall

Question 15

Kitchen sink rough in location/ heights

Answer 15

Back of cabinet, 12” from the side 12-15” high

Question 16

What type of water for testing DWV

Answer 16

Potable or non potable

Question 17

How long must a dwv water taste take place

Answer 17

Hold water for 15 minutes no leaks

Question 18

What psi for an air test on DWV

Answer 18

5 psi or 35kpa

Question 19

With a smoke test on DWV what must be connected somewhere on the system and what do you pressure the line too

Answer 19

A manometer must be connected somewhere on the line and test the line up to 1” or 25mm of water column. Must hold for 15 mins

Question 20

Why can’t you air pressure up the DWV system over 1” of water column for a test

Answer 20

It will blow the trap seals out

Question 21

When cleaning a drain line what works best for cutting roots

Answer 21

Cutting head