PLUMBING #1 GENERAL EXAMINATION
QUESTIONS WITH COMPLETE
ANSWERS
Sheet metal, constituting a part of any vent connector, shall be at least how many
inches. - Answer-0.0304
One material NOT approved for the installation of an external trap for a urinal is.... -
Answer-drawn-copper, alloy tubing traps
Hub and spigot cast-iron piping in 10-foot lengths, installed horizontally, shall be
supported at intervals of not more than ___ feet. - Answer-10 feet
A drain connecting the compartments of a set of fixture to a trap is called a (an) -
Answer-continuous waste
A device to prevent back flow into the potable water system is called a....... - Answer-
backflow preventer
Copper tube and fittings for drainage and vent piping installed above ground shall be at
least ________ - Answer-Type DWV
A ____ shall be permitted to be installed with indirect waste. - Answer-drinking fountain
Vitrified clay pipe and fitting are _____. - Answer-approved for use as a building drain
and shall be kept NOT less than 12 inches below ground.
Cast-iron soil pipe shall NOT be - Answer-threaded
All trenches deeper than the footing of any building or structure and paralleling the
same must be at least _____ from the bottom exterior edge of the footing or as
approved. - Answer-45 degrees
Sewer or other drainage piping that shall not be installed under or within 2 feet of any
building or structure is..... - Answer-SDR 35 sewer pipe
Cast-iron soil pipe shall be supported at.... - Answer-their base and each floor
Water service pipes, or any other underground pipes, shall NOT be run or laid in the
same trench with ______ unless specific conditions are met. - Answer-SDR 35 sewer
piping
, Notifications for inspections of work authorized by the permit shall be made - Answer-
NOT LESS than 24 hrs BEFOREEE the work has to be inspected
What water pipe systems shall be permitted to be tested with air? - Answer-PEX
The MINIMUM size waste pipe for a domestic kitchen sink is how many inches? -
Answer-2 inches
The MINIMUM size trap and trap arm for a kitchen sink is how many inches? - Answer-
1-1/2
One and a half
Horizontal drainage lines connecting with other horizontal shall enter through - Answer-
45 degree Y branches
In each run of horizontal drain piping, the distance between cleanouts shall NOT exceed
- Answer-100 feet
Three-inch horizontal shall be run in practical alignment and at a uniform slope of not
less than _____ inches per foot. How many inches per foot? - Answer-1/4
Where a fixture is installed on a floor level below the elevation of the next upstream
manhole, the fixtures shall be protected from back flow of sewage by installing
_____......... - Answer-a backwater valve
A sewage ejector discharge line shall be provided with a.... - Answer-backwater valve
and gate valve
The MAXIMUM number of water closets on a 3 inch stack is?? - Answer-four
Unless increased for it's entire length, the maximum length for a 1-1/2 inch vent pipe is
___ feet? - Answer-60 feet
The MAXIMUM fixtures units allowed on a 4-inch horizontal drain line with a 2 percent
slope is _____???? - Answer-216
A two inch waste stack will serve a maximum of??? - Answer-eight kitchen sinks
The MINIMUM size of a building sewer shall be determined on the basis of the total
number of fixture units drained by such sewer in accordance with ____? - Answer-table
717.1 fixtures unit loading
A fixture vent pipe increased one pipe size its entire length ____ - Answer-may exceed
the maximum horizontal length otherwise limited by code
A plumbing vent shall terminate no less than ____ - Answer-10 feet from an air intake
QUESTIONS WITH COMPLETE
ANSWERS
Sheet metal, constituting a part of any vent connector, shall be at least how many
inches. - Answer-0.0304
One material NOT approved for the installation of an external trap for a urinal is.... -
Answer-drawn-copper, alloy tubing traps
Hub and spigot cast-iron piping in 10-foot lengths, installed horizontally, shall be
supported at intervals of not more than ___ feet. - Answer-10 feet
A drain connecting the compartments of a set of fixture to a trap is called a (an) -
Answer-continuous waste
A device to prevent back flow into the potable water system is called a....... - Answer-
backflow preventer
Copper tube and fittings for drainage and vent piping installed above ground shall be at
least ________ - Answer-Type DWV
A ____ shall be permitted to be installed with indirect waste. - Answer-drinking fountain
Vitrified clay pipe and fitting are _____. - Answer-approved for use as a building drain
and shall be kept NOT less than 12 inches below ground.
Cast-iron soil pipe shall NOT be - Answer-threaded
All trenches deeper than the footing of any building or structure and paralleling the
same must be at least _____ from the bottom exterior edge of the footing or as
approved. - Answer-45 degrees
Sewer or other drainage piping that shall not be installed under or within 2 feet of any
building or structure is..... - Answer-SDR 35 sewer pipe
Cast-iron soil pipe shall be supported at.... - Answer-their base and each floor
Water service pipes, or any other underground pipes, shall NOT be run or laid in the
same trench with ______ unless specific conditions are met. - Answer-SDR 35 sewer
piping
, Notifications for inspections of work authorized by the permit shall be made - Answer-
NOT LESS than 24 hrs BEFOREEE the work has to be inspected
What water pipe systems shall be permitted to be tested with air? - Answer-PEX
The MINIMUM size waste pipe for a domestic kitchen sink is how many inches? -
Answer-2 inches
The MINIMUM size trap and trap arm for a kitchen sink is how many inches? - Answer-
1-1/2
One and a half
Horizontal drainage lines connecting with other horizontal shall enter through - Answer-
45 degree Y branches
In each run of horizontal drain piping, the distance between cleanouts shall NOT exceed
- Answer-100 feet
Three-inch horizontal shall be run in practical alignment and at a uniform slope of not
less than _____ inches per foot. How many inches per foot? - Answer-1/4
Where a fixture is installed on a floor level below the elevation of the next upstream
manhole, the fixtures shall be protected from back flow of sewage by installing
_____......... - Answer-a backwater valve
A sewage ejector discharge line shall be provided with a.... - Answer-backwater valve
and gate valve
The MAXIMUM number of water closets on a 3 inch stack is?? - Answer-four
Unless increased for it's entire length, the maximum length for a 1-1/2 inch vent pipe is
___ feet? - Answer-60 feet
The MAXIMUM fixtures units allowed on a 4-inch horizontal drain line with a 2 percent
slope is _____???? - Answer-216
A two inch waste stack will serve a maximum of??? - Answer-eight kitchen sinks
The MINIMUM size of a building sewer shall be determined on the basis of the total
number of fixture units drained by such sewer in accordance with ____? - Answer-table
717.1 fixtures unit loading
A fixture vent pipe increased one pipe size its entire length ____ - Answer-may exceed
the maximum horizontal length otherwise limited by code
A plumbing vent shall terminate no less than ____ - Answer-10 feet from an air intake
