Master Plumber Exam Newest 2026 Questions
and Correct Detailed Answers Already Graded A+
Where are trenches or excavated below the installation level of the pipe the
trench shall be backfilled to the bottom of the pipe with which two things in
layers is not greater than how many inches - CORRECT ANSWER-Sand are fine
gravel 6 inches then Tapton, please
When rock is encountered in trenching, the rock shall be removed, not less than
how many inches below the installation level of the pipe in the trench shall be
backfilled with which two things - CORRECT ANSWER-Not less than 3 inches
and sand and fine gravel again
If soft materials of poor low bearing quality are found at the bottom of the trench
then you want to over excavate not less than how many pipe diameters with and
backfill with which three things - CORRECT ANSWER-Crushed stone, fine,
gravel, or concrete
When you're back filling in 6 inch layers, you have to go how far above the crown
of the pipe at minimum while taping it - CORRECT ANSWER-12 inches above
the crown of the pipe
,Plumbing shall be installed due regard to preserve what - CORRECT ANSWER-
The strength of structural members
Plumbing fixtures and a pertinences used to receive discharge liquid waste shall
be directly or indirectly connected - CORRECT ANSWER-Directly connected
What are considered exceptions to the rule where plumbing fixtures have to be
directly connected there are five - CORRECT ANSWER-Bathtubs showers,
laboratories, clothes, washers, and laundry trays
Every plumbing fixture or a pertinence requiring water shall be directly or
indirectly connected - CORRECT ANSWER-It can be directly or indirectly
connected both is the correct answer
How is pipe tube been fitting sizes expressed in this code book - CORRECT
ANSWER-Nominal pipe size
Where can plumbing systems not be located in? - CORRECT ANSWER-Elevator
shaft or elevator equipment, room rooms
,If there's a conflict between this code and the manufacturer instructions, which
one will take precedence - CORRECT ANSWER-The more restrictive one
Waste products from manufacturing shall not be introduced into the public sewer
until it has been determined by who - CORRECT ANSWER-Code official
Each length of pipe and pipe fitting trap fixture and material shall be marked by
what two things - CORRECT ANSWER-The identification of the manufacturer
and referenced standards
What three things are permitted to be installed at the base of an elevator shaft
Do they have to be directly or indirectly connected? - CORRECT ANSWER-Floor
drains stumps and sump pumps as long as they're indirectly connected
Plastic pipe and fittings shall conform to which NSF - CORRECT ANSWER-
Number 14
Is cast-iron fittings third-party or first party list? - CORRECT ANSWER-Third-
party
, Strainer plates on drain inlet shall be knocked greater than what - CORRECT
ANSWER-Half an inch
Where there are openings in walls floors or ceilings for the passage of pipes, the
annular space between the pipes and the side of the opening shall be sealed with
- CORRECT ANSWER-Caulking, materials or closed gasketing system
Metallic pipe shall not be placed in direct contact with what - CORRECT
ANSWER-Steel framing, concrete, cinder walls, or other masonry
If cheating is used to protect metallic pipe against materials, the sheeting shall
have a thickness of not less than what and what material shall be made out of -
CORRECT ANSWER-.008 in plastic
What two types of metallic piping serves as an exception where it can be in
contact with corrosive materials - CORRECT ANSWER-Galvanized, steel, and
ductile iron
Any pipe that passes through a foundation wall shall be provided with what two
things and how many pipe size is greater - CORRECT ANSWER-Are relieving arc
or pipe sleeve two nominal pipe size is bigger
and Correct Detailed Answers Already Graded A+
Where are trenches or excavated below the installation level of the pipe the
trench shall be backfilled to the bottom of the pipe with which two things in
layers is not greater than how many inches - CORRECT ANSWER-Sand are fine
gravel 6 inches then Tapton, please
When rock is encountered in trenching, the rock shall be removed, not less than
how many inches below the installation level of the pipe in the trench shall be
backfilled with which two things - CORRECT ANSWER-Not less than 3 inches
and sand and fine gravel again
If soft materials of poor low bearing quality are found at the bottom of the trench
then you want to over excavate not less than how many pipe diameters with and
backfill with which three things - CORRECT ANSWER-Crushed stone, fine,
gravel, or concrete
When you're back filling in 6 inch layers, you have to go how far above the crown
of the pipe at minimum while taping it - CORRECT ANSWER-12 inches above
the crown of the pipe
,Plumbing shall be installed due regard to preserve what - CORRECT ANSWER-
The strength of structural members
Plumbing fixtures and a pertinences used to receive discharge liquid waste shall
be directly or indirectly connected - CORRECT ANSWER-Directly connected
What are considered exceptions to the rule where plumbing fixtures have to be
directly connected there are five - CORRECT ANSWER-Bathtubs showers,
laboratories, clothes, washers, and laundry trays
Every plumbing fixture or a pertinence requiring water shall be directly or
indirectly connected - CORRECT ANSWER-It can be directly or indirectly
connected both is the correct answer
How is pipe tube been fitting sizes expressed in this code book - CORRECT
ANSWER-Nominal pipe size
Where can plumbing systems not be located in? - CORRECT ANSWER-Elevator
shaft or elevator equipment, room rooms
,If there's a conflict between this code and the manufacturer instructions, which
one will take precedence - CORRECT ANSWER-The more restrictive one
Waste products from manufacturing shall not be introduced into the public sewer
until it has been determined by who - CORRECT ANSWER-Code official
Each length of pipe and pipe fitting trap fixture and material shall be marked by
what two things - CORRECT ANSWER-The identification of the manufacturer
and referenced standards
What three things are permitted to be installed at the base of an elevator shaft
Do they have to be directly or indirectly connected? - CORRECT ANSWER-Floor
drains stumps and sump pumps as long as they're indirectly connected
Plastic pipe and fittings shall conform to which NSF - CORRECT ANSWER-
Number 14
Is cast-iron fittings third-party or first party list? - CORRECT ANSWER-Third-
party
, Strainer plates on drain inlet shall be knocked greater than what - CORRECT
ANSWER-Half an inch
Where there are openings in walls floors or ceilings for the passage of pipes, the
annular space between the pipes and the side of the opening shall be sealed with
- CORRECT ANSWER-Caulking, materials or closed gasketing system
Metallic pipe shall not be placed in direct contact with what - CORRECT
ANSWER-Steel framing, concrete, cinder walls, or other masonry
If cheating is used to protect metallic pipe against materials, the sheeting shall
have a thickness of not less than what and what material shall be made out of -
CORRECT ANSWER-.008 in plastic
What two types of metallic piping serves as an exception where it can be in
contact with corrosive materials - CORRECT ANSWER-Galvanized, steel, and
ductile iron
Any pipe that passes through a foundation wall shall be provided with what two
things and how many pipe size is greater - CORRECT ANSWER-Are relieving arc
or pipe sleeve two nominal pipe size is bigger
