Acid-resisting trap is installed underground, such trap shall be embedded in concrete extending _" beyond the trap.

• 2
• 3
• 4
• 6

The maximum retention time for untreated gray water in a collection reservoir is __________ hours.

• 24
• 48
• 36
• 72

Hose bibbs require protection from backflow by a(n) __________.

• Air gap
• Vacuum breaker
• Reduced pressure principle backflow preventer
• Double check valve

All horizontal drains shall have cleanouts located no more than __________ feet apart.

• 40
• 60
• 80
• 100

Individual and branch vent pipes over 40 feet long require __________.

• not less than 2 inches in diameter
• one-half the diameter of the drain served
• not less than 2 pipe sizes smaller than the largest drain served
• pipe size greater than otherwise required

"Test reports required as evidence of code compliance shall be retained for __________.

• 180 days after completion of the project
• the period required for retention of public records
• 90 days after completion of the project
• 120 days after occupancy of the building

The maximum developed length of a 11/4-inch vent pipe for a 40 gpm sewage ejector pump is __________ feet.

• unlimited
• 40
• 72
• d. 160

Privacy partitions for urinals are not required in a(n) __________ toilet room.

• employee
• Group I-3
• family/assisted use
• mercantile

Prohibited corrosive liquids must be __________ before discharge into the sanitary drainage system.

• permitted for discharge by state and federal agencies
• filtered through a diatomaceous earth filtration system
• diluted by water or passed through a neutralizing medium
• to determine that they are not corrosive to the piping system

A common vent provides venting to __________.

• one fixture
• two fixtures
• three fixtures
• four fixtures