Master Plumber Exam Study
Guide – Practice Questions
with Verified Answers. GRADED
A+. Latest 2026/2027 Update
Sewage Ejector - Answer✔✔-Type of pump that discharges waste in the sump
pit and transfers the waste to the house drain. (Max Fajardo)
503 mm - Answer✔✔-Minimum dimension of a septic tank manhole.
Industrial drain - Answer✔✔-drain that discharges objectionable waste such as
acids and other chemicals from industrial equipment .
75 mm - Answer✔✔-Minimum diameter of pipe of any water closet.
3 - Answer✔✔-Maximum number of water closets able to discharge into a
shared 75mm diameter horizontal soil branch
Combination Sewer - Answer✔✔-Type of sewer that discharges both storm
water and sewage from households, rendered obsolete due to the health
hazards it poses
,Septic Tank - Answer✔✔-Airtight receptacle used to expedite the
decomposition of elements contained in raw sewage, usually located 1.5
meters from the property line and 15.2 meters from the water main or any
potable water source. It is comprised of two chambers that contain anaerobic
bacteria that break down wastes.
Sedimentation - Answer✔✔-Term defined as the settling down or separation of
solid matter suspended in a liquid.
1% - Answer✔✔-Minimum slope or grade (in %) permitted with 100mm (4'')
pipes.
Scum - Answer✔✔-Lighter organic solid particles found in sewage, cesspools
and septic tanks, found floating on the liquid.
Sludge - Answer✔✔-Term defined as the organic particles that have settled
down in septic tanks, cesspools or sewage.
900 mm - Answer✔✔-Minimum WIDTH of a septic tank for residential
dwellings. (mm)
1500 mm - Answer✔✔-Minimum LENGTH of a septic tank for residential
dwellings. (mm)
1200 mm - Answer✔✔-Minimum DEPTH of a septic tank for residential
dwellings. (mm)
,Hair - Answer✔✔-Leading cause of pipe clogs in waste and soil pipes.
Drainage, Waste and Vent - Answer✔✔-Definition of DWV
Acrylonitrile butadiene styrene - Answer✔✔-Definition of ABS
Oval - Answer✔✔-Cross sectional shape of the interior of Polybutene pipes
(PB).
38 mm - Answer✔✔-Minimum size of cleanouts. (mm)
Corporation Stop - Answer✔✔-Type of valve found in the service main, used as
a control of the water service and shut off valve when service is disconnected.
Check Valve - Answer✔✔-Type of valve used to prevent backflow or reversal of
flow of water, usually found after the water meter.
Union Patente - Answer✔✔-Fitting used to describe the connection of the
service pipe and water meter. Usually used as the demarcation between the
property of the water service and water supply pipe system residential dwelling
or building.
Booster Pump / Pneumatic Pump - Answer✔✔-Type of pump used to
distribute water within a building or residence, when an upfeed system cannot
provide adequate pressure to supply fixtures with potable water.
, Durham System - Answer✔✔-Type of piping system that is characterized by
threading and connecting cast iron pipes in the building.
Teflon Tape - Answer✔✔-Material used to fuse joints or connections of GI
pipes.
Caulking - Answer✔✔-Process of joining the joints and connections of cast iron
pipes.
Motor Oil - Answer✔✔-Type of oil used when threading GI pipes.
Centrifugal Pump - Answer✔✔-Type of pump used for high-rise or mid-rise
buildings, when booster or piston pumps are unavailable or inadequate.
Piston Pump - Answer✔✔-Type of pump used for residential or low-rise
buildings, and comes in single action, double action or twin.
Drum Trap - Answer✔✔-Type of trap that is installed only in bathtubs.
Flushometer Valve - Answer✔✔-Type of flushing valve used in commercial
water closets, usually installed with a pressure tank that expels air pressure and
a set amount of water when flushing.
14 - Answer✔✔-Number of teeth per inch in a hacksaw blade used to cut GI
pipes.
Guide – Practice Questions
with Verified Answers. GRADED
A+. Latest 2026/2027 Update
Sewage Ejector - Answer✔✔-Type of pump that discharges waste in the sump
pit and transfers the waste to the house drain. (Max Fajardo)
503 mm - Answer✔✔-Minimum dimension of a septic tank manhole.
Industrial drain - Answer✔✔-drain that discharges objectionable waste such as
acids and other chemicals from industrial equipment .
75 mm - Answer✔✔-Minimum diameter of pipe of any water closet.
3 - Answer✔✔-Maximum number of water closets able to discharge into a
shared 75mm diameter horizontal soil branch
Combination Sewer - Answer✔✔-Type of sewer that discharges both storm
water and sewage from households, rendered obsolete due to the health
hazards it poses
,Septic Tank - Answer✔✔-Airtight receptacle used to expedite the
decomposition of elements contained in raw sewage, usually located 1.5
meters from the property line and 15.2 meters from the water main or any
potable water source. It is comprised of two chambers that contain anaerobic
bacteria that break down wastes.
Sedimentation - Answer✔✔-Term defined as the settling down or separation of
solid matter suspended in a liquid.
1% - Answer✔✔-Minimum slope or grade (in %) permitted with 100mm (4'')
pipes.
Scum - Answer✔✔-Lighter organic solid particles found in sewage, cesspools
and septic tanks, found floating on the liquid.
Sludge - Answer✔✔-Term defined as the organic particles that have settled
down in septic tanks, cesspools or sewage.
900 mm - Answer✔✔-Minimum WIDTH of a septic tank for residential
dwellings. (mm)
1500 mm - Answer✔✔-Minimum LENGTH of a septic tank for residential
dwellings. (mm)
1200 mm - Answer✔✔-Minimum DEPTH of a septic tank for residential
dwellings. (mm)
,Hair - Answer✔✔-Leading cause of pipe clogs in waste and soil pipes.
Drainage, Waste and Vent - Answer✔✔-Definition of DWV
Acrylonitrile butadiene styrene - Answer✔✔-Definition of ABS
Oval - Answer✔✔-Cross sectional shape of the interior of Polybutene pipes
(PB).
38 mm - Answer✔✔-Minimum size of cleanouts. (mm)
Corporation Stop - Answer✔✔-Type of valve found in the service main, used as
a control of the water service and shut off valve when service is disconnected.
Check Valve - Answer✔✔-Type of valve used to prevent backflow or reversal of
flow of water, usually found after the water meter.
Union Patente - Answer✔✔-Fitting used to describe the connection of the
service pipe and water meter. Usually used as the demarcation between the
property of the water service and water supply pipe system residential dwelling
or building.
Booster Pump / Pneumatic Pump - Answer✔✔-Type of pump used to
distribute water within a building or residence, when an upfeed system cannot
provide adequate pressure to supply fixtures with potable water.
, Durham System - Answer✔✔-Type of piping system that is characterized by
threading and connecting cast iron pipes in the building.
Teflon Tape - Answer✔✔-Material used to fuse joints or connections of GI
pipes.
Caulking - Answer✔✔-Process of joining the joints and connections of cast iron
pipes.
Motor Oil - Answer✔✔-Type of oil used when threading GI pipes.
Centrifugal Pump - Answer✔✔-Type of pump used for high-rise or mid-rise
buildings, when booster or piston pumps are unavailable or inadequate.
Piston Pump - Answer✔✔-Type of pump used for residential or low-rise
buildings, and comes in single action, double action or twin.
Drum Trap - Answer✔✔-Type of trap that is installed only in bathtubs.
Flushometer Valve - Answer✔✔-Type of flushing valve used in commercial
water closets, usually installed with a pressure tank that expels air pressure and
a set amount of water when flushing.
14 - Answer✔✔-Number of teeth per inch in a hacksaw blade used to cut GI
pipes.
