Code Prep

Question 1

The minimum height of water column allowed for testing underground drains is _______.

Answer 1

10’

Question 2

Shield plates used to protect pipes passing through the top or bottom plate of a wall must extend a minimum of ______ inches below the top plate or above the bottom plate.

Answer 2

2”

Question 3

When using air to test a part or all of a drainage system, air shall be pumped into the piping until there is a sufficient pressure to balance a ______ inch column of water column.

Answer 3

10’

Question 4

Piping under a slab must be a minimum of ______ inches deep.

Answer 4

No required depth

Question 5

A wood “oor joist cannot be notched on top or bottom more than _____ of its depth. Where can it NOT be notched?

Answer 5

1/6, middle 1/3 of the joist

Question 6

Opening made in walls or floors for the installation of pipe shall be seals by the use of ______ or ________

Answer 6

Caulk or casketing materials

Question 7

Horizontal Polypropylene Pipe that is 1-1/2 inch in diameter requires a hanger every _______ft.

Answer 7

4 ft

Question 8

When sleeves are installed to allow pipes to pass through walls or foundations, the annular space between the pipe and sleeve must be ______ in an approved

Answer 8

Sealed

Question 9

Air may be used to test a copper potable water system or any part thereof if ________.

Answer 9

If the pressure is not less than 50 PSI

Question 10

A test gauge used on a low- pressure test (10 PSI and below) must show pressure such that each mark on the dial represents

Answer 10

0.1

Question 11

A partition wall stud cannot be notched more than ______% of its depth. It cannot be bored more than ______% of its depth.

Answer 11

40% / 60%

Question 12

If you used air to test a drain line, the pressure gauge would have to read ______ PSI and the test would last _______ minutes.

Answer 12

5 PSI and 15 minutes

Question 13

A wood joist cannot be bored more than ________ of its depth and the hole shall be not closer than ______ to the edge.

Answer 13

d. 1/4, 1.5”

Question 14

The diameter of sleeves used to protect pipes passing through foundations, “oors or walls shall not be less than ______ than the pipe protected

Answer 14

2 pipe sizes larger

Question 15

If soft materials of poor load bearing qualities are found at the bottom of the trench, stabilization shall be achieved by over excavating a minimum ________ and backfilling to the installation level of the bottom of the pipe with #ne gravel, crushed stone or concert

Answer 15

a concrete foundation.

Question 16

If soft materials of poor load bearing qualities are found at the bottom of the trench, stabilization shall be achieved by over excavating a minimum ________ and backfilling to the installation level of the bottom of the pipe with #ne gravel, crushed stone or a concrete foundation.

Answer 16

2 pipe diameters

Question 17

Potable water service lines must be buried a minimum of _____ inches below the frost line and not less than ______ inches below grade.

Answer 17

6 in minimum and not less that 12 in below grade

Question 18

Bathtubs, showers, and lavatories are not required to be connected to the sanitary drainage system if they are connected to a _____________ system.

Answer 18

c. Grey water

Question 19

A vertical 6” cast-iron pipe that runs from the bottom “oor to the seventh “oor of a building. There is a distance of 14ft between the #rst and second and third “oors, of 12ft between all other “oors would require _______ pipe hangers or supports?
Outside drainage

Answer 19

5 pipe hanger

Question 20

Strainer plats installed on drain inlets shall not have an opening greater than _______.

Answer 20

1/2 inch

Question 21

Pipes passing through concrete or cinder block must be protected by protective sheathing or wrap with a minimum wall thickness of ______ inch

Answer 21

0.025