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& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Your Report
Wrong
Q.1) Of the four board subjects given for Master Plumbers examination, which of this subject was
originally split into two subjects?
A. Plumbing Code
B. Design and Installations
C. Plumbing Arithmetic (Your Answer)
D. Practical Problems (Correct Answer)
Wrong
Q.2) Copper tube and fittings used for drainage and vent piping installed aboveground shall be at
least ____.
A. Type DWV (Correct Answer)
B. Type L
C. Type K
D. Type M (Your Answer)
Correct
Q.3) A domestic dishwasher drain shall first connect to ____.
A. an approved airgap fitting (Your Answer)
B. a double-check valve
C. a triple-check valve
D. an approved valve
Correct
Q.4) Unions shall be installed in a water supply system within ____ to a water heater
A. 36 inches
B. 12 inches (Your Answer)
C. 24 inches
D. 48 inches
Correct
Q.5) A branch line serving a trap in a combination waste and vent system is required to be separately
vented when the length of the branch exceeds ____.
A. 15 (Your Answer)
B. 10
C. 5
D. 25
Wrong
Q.6) Three-inch horizontal drainage piping shall be run in practical alignment and at a uniform slope
of not less than ____.
A. 1/4 inch per foot (Correct Answer)
B. 1/16 inch per foot
C. 1/2 inch per foot (Your Answer)
D. 1/8 inch per foot
10/1/2026,
Plumbing
6:02:37
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Master
AMPlumbing
Plumber
Master Plumber
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Master
Problems
Plumber
Exam Problems
&Exam
Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Problems
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
, PlumbingPlumbing
Master Plumber
Plumbing
Master Plumber
Exam
Master
Problems
Plumber
Exam Problems
&Exam
Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Problems
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Correct
Q.7) The minimum requirement for the slope of horizontal drainage pipes between manholes is
A. 4%
B. 2-1/2 %
C. 2% (Your Answer)
D. 3%
Wrong
Q.8) A drain connecting the compartments of a set of fixtures to its trap is called a(an) ____.
A. continuous waste (Correct Answer)
B. special waste
C. indirect waste (Your Answer)
D. combination waste and vent
Unanswered
Q.9) The maximum number of lavatories on a 2-1/2 inch horizontal waste line is ____.
A. 10
B. 14 (Correct Answer)
C. 20
D. 6
Wrong
Q.10) The maximum distance a gas shutoff valve may be from a gas appliance (except for range and
dryer connectors) is ____.
A. 6 feet (Correct Answer)
B. 10feet
C. 3 feet (Your Answer)
D. 2 feet
Wrong
Q.11) An ejector discharge line shall be provided with a ____
A. gate valve only
B. backwater valve and gate valve (Correct Answer)
C. backwater valve only
D. swing check valve and a globe valve (Your Answer)
Correct
Q.12) In the water test of the entire plumbing system all openings should be tightly closed except at
A. protruding cleanouts
B. bleeders
C. stack vent
D. highest opening (Your Answer)
Wrong
Q.13) Because of structural conditions, a 4-inch house drain is installed with a slope of 1/8 inch per
foot. This installation will result in a(an) ____.
10/1/2026,
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6:02:37
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Master
AMPlumbing
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Master Plumber
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Master
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Plumber
Exam Problems
&Exam
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Problems
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
, PlumbingPlumbing
Master Plumber
Plumbing
Master Plumber
Exam
Master
Problems
Plumber
Exam Problems
&Exam
Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Problems
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
A. increased scouring and cleansing action
B. reduction in fixture unit loading allowance (Correct Answer)
C. separation of solids and liquid (Your Answer)
D. increased allowance in fixture unit loading
Correct
Q.14) A ____ may be installed with indirect waste
A. water closet
B. domestic kitchen sink
C. drinking fountain (Your Answer)
D. lavatory
Correct
Q.15) A ____ trap is not self-cleaning
A. plaster
B. cast-iron
C. bell
D. grease (Your Answer)
Correct
Q.16) Chemical or industrial liquid wastes that are likely to damage the public sanitary sewer system
shall ____.
A. be pretreated to render them innocuous (Your Answer)
B. not be used under any condition
C. be drained into a holding tank
D. be drained into a storm drain
Wrong
Q.17) A seamless drawn-brass fixture tailpiece shall be ____.
A. 24 B&S gauge (Your Answer)
B. 20 B&S gauge (Correct Answer)
C. 22 B&S gauge
D. 26 B&S gauge
Correct
Q.18) Hub and spigot cast-iron piping in 10-foot lengths, installed horizontally, shall be supported at
intervals of not more than ____.
A. 10 feet (Your Answer)
B. 12 feet
C. 5 feet
D. 15 feet
Wrong
Q.19) Water heater vents terminate above a roof surface at least ____ from a vertical wall.
*
10/1/2026,
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Master
AMPlumbing
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& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
, PlumbingPlumbing
Master Plumber
Plumbing
Master Plumber
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Master
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Exam Problems
&Exam
Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Problems
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
A. 12 inches (Correct Answer)
B. 6 inches (Your Answer)
C. 8 feet
D. 3 feet
Correct
Q.20) The distance from the center of a water closet to any side wall or partition shall not be closer
than ____.
A. 15 inches (Your Answer)
B. 12 inches
C. 24 inches
D. 30 inches
Correct
Q.21) Drinking fountains may be installed with ____.
A. steel pipe
B. indirect wastes (Your Answer)
C. yoke venting
D. bell traps
Correct
Q.22) Joints at the roof around pipes shall be made watertight by the use of ____.
A. epoxy glue
B. flashings (Your Answer)
C. waterproof paint
D. tar and paper
Correct
Q.23) A device to prevent backflow into the potable water system is called a ____.
*
A. backflow connection
B. siphon leg
C. backflow preventer (Your Answer)
D. back-siphonage
Correct
Q.24) Building sewers shall be tested by completely filling the sewer with water from the ____.
*
A. lowest to the highest point (Your Answer)
10/1/2026,
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Master
AMPlumbing
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Master Plumber
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Master
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Problems
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& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Master Plumber
Plumbing
Master Plumber
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Master
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Plumber
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Problems
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& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Your Report
Wrong
Q.1) Of the four board subjects given for Master Plumbers examination, which of this subject was
originally split into two subjects?
A. Plumbing Code
B. Design and Installations
C. Plumbing Arithmetic (Your Answer)
D. Practical Problems (Correct Answer)
Wrong
Q.2) Copper tube and fittings used for drainage and vent piping installed aboveground shall be at
least ____.
A. Type DWV (Correct Answer)
B. Type L
C. Type K
D. Type M (Your Answer)
Correct
Q.3) A domestic dishwasher drain shall first connect to ____.
A. an approved airgap fitting (Your Answer)
B. a double-check valve
C. a triple-check valve
D. an approved valve
Correct
Q.4) Unions shall be installed in a water supply system within ____ to a water heater
A. 36 inches
B. 12 inches (Your Answer)
C. 24 inches
D. 48 inches
Correct
Q.5) A branch line serving a trap in a combination waste and vent system is required to be separately
vented when the length of the branch exceeds ____.
A. 15 (Your Answer)
B. 10
C. 5
D. 25
Wrong
Q.6) Three-inch horizontal drainage piping shall be run in practical alignment and at a uniform slope
of not less than ____.
A. 1/4 inch per foot (Correct Answer)
B. 1/16 inch per foot
C. 1/2 inch per foot (Your Answer)
D. 1/8 inch per foot
10/1/2026,
Plumbing
6:02:37
Plumbing
Master
AMPlumbing
Plumber
Master Plumber
Exam
Master
Problems
Plumber
Exam Problems
&Exam
Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Problems
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
, PlumbingPlumbing
Master Plumber
Plumbing
Master Plumber
Exam
Master
Problems
Plumber
Exam Problems
&Exam
Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Problems
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
Correct
Q.7) The minimum requirement for the slope of horizontal drainage pipes between manholes is
A. 4%
B. 2-1/2 %
C. 2% (Your Answer)
D. 3%
Wrong
Q.8) A drain connecting the compartments of a set of fixtures to its trap is called a(an) ____.
A. continuous waste (Correct Answer)
B. special waste
C. indirect waste (Your Answer)
D. combination waste and vent
Unanswered
Q.9) The maximum number of lavatories on a 2-1/2 inch horizontal waste line is ____.
A. 10
B. 14 (Correct Answer)
C. 20
D. 6
Wrong
Q.10) The maximum distance a gas shutoff valve may be from a gas appliance (except for range and
dryer connectors) is ____.
A. 6 feet (Correct Answer)
B. 10feet
C. 3 feet (Your Answer)
D. 2 feet
Wrong
Q.11) An ejector discharge line shall be provided with a ____
A. gate valve only
B. backwater valve and gate valve (Correct Answer)
C. backwater valve only
D. swing check valve and a globe valve (Your Answer)
Correct
Q.12) In the water test of the entire plumbing system all openings should be tightly closed except at
A. protruding cleanouts
B. bleeders
C. stack vent
D. highest opening (Your Answer)
Wrong
Q.13) Because of structural conditions, a 4-inch house drain is installed with a slope of 1/8 inch per
foot. This installation will result in a(an) ____.
10/1/2026,
Plumbing
6:02:37
Plumbing
Master
AMPlumbing
Plumber
Master Plumber
Exam
Master
Problems
Plumber
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Problems
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
, PlumbingPlumbing
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Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
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& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
A. increased scouring and cleansing action
B. reduction in fixture unit loading allowance (Correct Answer)
C. separation of solids and liquid (Your Answer)
D. increased allowance in fixture unit loading
Correct
Q.14) A ____ may be installed with indirect waste
A. water closet
B. domestic kitchen sink
C. drinking fountain (Your Answer)
D. lavatory
Correct
Q.15) A ____ trap is not self-cleaning
A. plaster
B. cast-iron
C. bell
D. grease (Your Answer)
Correct
Q.16) Chemical or industrial liquid wastes that are likely to damage the public sanitary sewer system
shall ____.
A. be pretreated to render them innocuous (Your Answer)
B. not be used under any condition
C. be drained into a holding tank
D. be drained into a storm drain
Wrong
Q.17) A seamless drawn-brass fixture tailpiece shall be ____.
A. 24 B&S gauge (Your Answer)
B. 20 B&S gauge (Correct Answer)
C. 22 B&S gauge
D. 26 B&S gauge
Correct
Q.18) Hub and spigot cast-iron piping in 10-foot lengths, installed horizontally, shall be supported at
intervals of not more than ____.
A. 10 feet (Your Answer)
B. 12 feet
C. 5 feet
D. 15 feet
Wrong
Q.19) Water heater vents terminate above a roof surface at least ____ from a vertical wall.
*
10/1/2026,
Plumbing
6:02:37
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Master
AMPlumbing
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Master Plumber
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Master
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& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
, PlumbingPlumbing
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Plumbing
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& Solutions.pdfY!G*EIH(*#Y!(*#Y#*!#!&**#*GESMSS*(@U(*UE@&*EH*HJE@&EH*@(o8
A. 12 inches (Correct Answer)
B. 6 inches (Your Answer)
C. 8 feet
D. 3 feet
Correct
Q.20) The distance from the center of a water closet to any side wall or partition shall not be closer
than ____.
A. 15 inches (Your Answer)
B. 12 inches
C. 24 inches
D. 30 inches
Correct
Q.21) Drinking fountains may be installed with ____.
A. steel pipe
B. indirect wastes (Your Answer)
C. yoke venting
D. bell traps
Correct
Q.22) Joints at the roof around pipes shall be made watertight by the use of ____.
A. epoxy glue
B. flashings (Your Answer)
C. waterproof paint
D. tar and paper
Correct
Q.23) A device to prevent backflow into the potable water system is called a ____.
*
A. backflow connection
B. siphon leg
C. backflow preventer (Your Answer)
D. back-siphonage
Correct
Q.24) Building sewers shall be tested by completely filling the sewer with water from the ____.
*
A. lowest to the highest point (Your Answer)
10/1/2026,
Plumbing
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Plumbing
Master
AMPlumbing
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Master Plumber
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Master
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