Texas State Plumbing Inspectors Exam
2026 Questions and Answers
Fixture connections which may be served through access panels are considered -
Answer -Accessible
The part of the lowest piping of a drainage system, which recieves the discharge
from the soil, waste and other drainage pipes inside the walls of the building and
conveys it to a point 2 feet outside the building wall is a - Answer -Building drain
A vertical vent that is a continuation of the drain to which it connects is a - Answer
-Continuous vent
A vent which also serves as a drain is a - Answer -Wet vent
A strack is always - Answer -Vertical
A pipe which makes an angle of not more than 45 degrees with the vertical is
considered - Answer -Horizontal
The vertical depth of a trap seal is measured from - Answer -The weir and the top
of the dip of the trap
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,The principal artery of the venting system to which branches may be connected is
called - Answer -Main vent
A pressure surge absorbing device operating through the compressibility of air is
called - Answer -Hammer arrestor
A device installed in a drainage system to prevent reverse flow is a - Answer -
Backwater valve
Any pressure less than that exerted by atmosphere is - Answer -A vacuum
A plugged fitting located at the base of all soil stacks is called - Answer -Stack
cleanout
A vertical line of piping that extends one or more floors and recieved the discharge
of water closets and other fixtures is known as - Answer -Soil stack
A pipe which contains waste that is free from fecal matter is - Answer -Waste
The piping that extends from the end of the building drain and conveys discharge
to the public sewer system is - Answer -Building sewer
A branch can be in any part of the plumbing system except - Answer -Riser
An area drain is - Answer -A catch basin
Which item is not part of a plumbing system - Answer -Sprinkler systems
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, Which of the following may give approval for a plumber to cover their installation
- Answer -Authority having jurisdiction
A lavatory drain that is connected into the vent of the water closet is referred to as -
Answer -Wet vent
A pipe that supplies potable water to any building or part of the lot is known as a -
Answer -Building supply
The drain line between the trap and the vent is called - Answer -Trap arm
Without any movement of the water the pressure measured with a gauge would be
referred to as - Answer -Static pressure
Vent pipes - Answer -Stop back siphonage of traps
On a drain line, 1/4 in to the foot is known as - Answer -Fall. grade or slope
Trenches installed parallel to footings shall not extend below the _________
bearing plane of the footing or wall - Answer -45 degree
Loose earth free from rocks, broken concrete and frozen chunks shall be placed in
the trench in _________ layers and tamped in place until the crown of the pipe is
covered by ___________ of tamped earth - Answer -6in-12in
©COPYRIGHT 2025,ALL RIGHTS RESERVED 3
2026 Questions and Answers
Fixture connections which may be served through access panels are considered -
Answer -Accessible
The part of the lowest piping of a drainage system, which recieves the discharge
from the soil, waste and other drainage pipes inside the walls of the building and
conveys it to a point 2 feet outside the building wall is a - Answer -Building drain
A vertical vent that is a continuation of the drain to which it connects is a - Answer
-Continuous vent
A vent which also serves as a drain is a - Answer -Wet vent
A strack is always - Answer -Vertical
A pipe which makes an angle of not more than 45 degrees with the vertical is
considered - Answer -Horizontal
The vertical depth of a trap seal is measured from - Answer -The weir and the top
of the dip of the trap
©COPYRIGHT 2025,ALL RIGHTS RESERVED 1
,The principal artery of the venting system to which branches may be connected is
called - Answer -Main vent
A pressure surge absorbing device operating through the compressibility of air is
called - Answer -Hammer arrestor
A device installed in a drainage system to prevent reverse flow is a - Answer -
Backwater valve
Any pressure less than that exerted by atmosphere is - Answer -A vacuum
A plugged fitting located at the base of all soil stacks is called - Answer -Stack
cleanout
A vertical line of piping that extends one or more floors and recieved the discharge
of water closets and other fixtures is known as - Answer -Soil stack
A pipe which contains waste that is free from fecal matter is - Answer -Waste
The piping that extends from the end of the building drain and conveys discharge
to the public sewer system is - Answer -Building sewer
A branch can be in any part of the plumbing system except - Answer -Riser
An area drain is - Answer -A catch basin
Which item is not part of a plumbing system - Answer -Sprinkler systems
©COPYRIGHT 2025,ALL RIGHTS RESERVED 2
, Which of the following may give approval for a plumber to cover their installation
- Answer -Authority having jurisdiction
A lavatory drain that is connected into the vent of the water closet is referred to as -
Answer -Wet vent
A pipe that supplies potable water to any building or part of the lot is known as a -
Answer -Building supply
The drain line between the trap and the vent is called - Answer -Trap arm
Without any movement of the water the pressure measured with a gauge would be
referred to as - Answer -Static pressure
Vent pipes - Answer -Stop back siphonage of traps
On a drain line, 1/4 in to the foot is known as - Answer -Fall. grade or slope
Trenches installed parallel to footings shall not extend below the _________
bearing plane of the footing or wall - Answer -45 degree
Loose earth free from rocks, broken concrete and frozen chunks shall be placed in
the trench in _________ layers and tamped in place until the crown of the pipe is
covered by ___________ of tamped earth - Answer -6in-12in
©COPYRIGHT 2025,ALL RIGHTS RESERVED 3
