2018 International Plumbing Code

1. A __________ is permitted to discharge to an approved nonpotable water system.

• clothes washer

• bidet

• floor drain

• sink

Answer explanation

301.3, Exception

When installed horizontally, 1-1/4-inch polypropylene pipe and tubing shall be supported at maximum intervals of __________.

• 32 inches

• 8 feet

• 48 inches

• 10 feet

Answer explanation

Table 308.5

1. All of the following are minimum requirements of a water heater installation, except __________.

• a valve on the cold water supply to the water heater

• a drain valve at the bottom of each tank-type water heater

• a means to prevent siphoning of the tank in the event of a negative supply

  pressure

• a means to provide continuous circulation from the piping systems to the

  heater

Answer explanation

501.3, 503.1 and 504.1

When there is a conflict between the requirements of the code and the manufacturer’s

installation instructions, the __________ requirements apply.

• code

• more specific

• more restrictive

• manufacturer’s

Answer explanation

301.7

1. When is a common building sewer connecting more than one building to the public sewer allowed?

• when the building tenants agree to the shared use of the sewer

• when the city sewer system does not extend to the property line

• when the common sewer is controlled by a property owners association

• when all buildings using the common sewer are located on the same

  property

Answer explanation

Sec. 701.3

2. Where the wastewater temperature will exceed __________ °F, the drainage piping material must be rated for the highest temperature of the wastewater.

​ (a)  

• 140
• 110
• 120
• 160

Answer explanation

702.5

1. Water closets installed in public and employee restrooms do not require __________ seats.

a. nonabsorbent b. elongated

c. open front d. integral

• nonabsorbent

• elongated

• open front

• integral

Answer explanation

425.2 and 425.3

3. A solvent-cement joint between ABS and PVC plastic piping is _​ (a)   _________.

• where the blg drain connects the bld sewer
• prohibited
• permitted in above ground locations only
• permitted with yellow primer with ASTM D3138

6. The minimum burial depth of exterior water service piping is __________ inches

below grade.

• 6

• 12

• 24

• 30

Answer explanation

305.4

2. In each toilet room of an institutional occupancy, urinals may be substituted for no more than __________ percent of the required number of water closets.

• 50

• 33

• 67

• 75

Answer explanation

424.2