Master Plumber Exam 1 questions and
answers 2026\2027 A+ Grade
Sewage Ejector
- correct answer Type of pump that discharges waste in the sump pit and transfers the waste to the
house drain. (Max Fajardo)
503 mm
- correct answer Minimum dimension of a septic tank manhole.
Industrial drain
- correct answer drain that discharges objectionable waste such as acids and other chemicals from
industrial equipment .
75 mm
- correct answer Minimum diameter of pipe of any water closet.
3
- correct answer Maximum number of water closets able to discharge into a shared 75mm diameter
horizontal soil branch
Combination Sewer
- correct answer Type of sewer that discharges both storm water and sewage from households,
rendered obsolete due to the health hazards it poses
Septic Tank
- correct 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
- correct answer Term defined as the settling down or separation of solid matter suspended in a liquid.
1%
- correct answer Minimum slope or grade (in %) permitted with 100mm (4'') pipes.
Scum
- correct answer Lighter organic solid particles found in sewage, cesspools and septic tanks, found
floating on the liquid.
Sludge
- correct answer Term defined as the organic particles that have settled down in septic tanks, cesspools
or sewage.
900 mm
- correct answer Minimum WIDTH of a septic tank for residential dwellings. (mm)
1500 mm
- correct answer Minimum LENGTH of a septic tank for residential dwellings. (mm)
1200 mm
- correct answer Minimum DEPTH of a septic tank for residential dwellings. (mm)
Hair
- correct answer Leading cause of pipe clogs in waste and soil pipes.
Drainage, Waste and Vent
- correct answer Definition of DWV
Acrylonitrile butadiene styrene
- correct answer Definition of ABS
,Oval
- correct answer Cross sectional shape of the interior of Polybutene pipes (PB).
38 mm
- correct answer Minimum size of cleanouts. (mm)
Corporation Stop
- correct 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
- correct answer Type of valve used to prevent backflow or reversal of flow of water, usually found after
the water meter.
Union Patente
- correct 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
- correct 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
- correct answer Type of piping system that is characterized by threading and connecting cast iron pipes
in the building.
Teflon Tape
- correct answer Material used to fuse joints or connections of GI pipes.
Caulking
- correct answer Process of joining the joints and connections of cast iron pipes.
, Motor Oil
- correct answer Type of oil used when threading GI pipes.
Centrifugal Pump
- correct answer Type of pump used for high-rise or mid-rise buildings, when booster or piston pumps
are unavailable or inadequate.
Piston Pump
- correct answer Type of pump used for residential or low-rise buildings, and comes in single action,
double action or twin.
Drum Trap
- correct answer Type of trap that is installed only in bathtubs.
Flushometer Valve
- correct 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
- correct answer Number of teeth per inch in a hacksaw blade used to cut GI pipes.
Looped Vent
- correct answer Type of vent used in an island counter type kitchen sink.
Trap Seal
- correct answer Maximum vertical depth of liquid that a trap can contain.
Sump Pit
- correct answer Type of detention pit usually found in basements, used to gather and discharge waste
water, sometimes with the help of a pump.
Standpipe
- correct answer Vertical pipe that is used for the storage of water, usually contains pressure and is used
for fire suppression.
answers 2026\2027 A+ Grade
Sewage Ejector
- correct answer Type of pump that discharges waste in the sump pit and transfers the waste to the
house drain. (Max Fajardo)
503 mm
- correct answer Minimum dimension of a septic tank manhole.
Industrial drain
- correct answer drain that discharges objectionable waste such as acids and other chemicals from
industrial equipment .
75 mm
- correct answer Minimum diameter of pipe of any water closet.
3
- correct answer Maximum number of water closets able to discharge into a shared 75mm diameter
horizontal soil branch
Combination Sewer
- correct answer Type of sewer that discharges both storm water and sewage from households,
rendered obsolete due to the health hazards it poses
Septic Tank
- correct 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
- correct answer Term defined as the settling down or separation of solid matter suspended in a liquid.
1%
- correct answer Minimum slope or grade (in %) permitted with 100mm (4'') pipes.
Scum
- correct answer Lighter organic solid particles found in sewage, cesspools and septic tanks, found
floating on the liquid.
Sludge
- correct answer Term defined as the organic particles that have settled down in septic tanks, cesspools
or sewage.
900 mm
- correct answer Minimum WIDTH of a septic tank for residential dwellings. (mm)
1500 mm
- correct answer Minimum LENGTH of a septic tank for residential dwellings. (mm)
1200 mm
- correct answer Minimum DEPTH of a septic tank for residential dwellings. (mm)
Hair
- correct answer Leading cause of pipe clogs in waste and soil pipes.
Drainage, Waste and Vent
- correct answer Definition of DWV
Acrylonitrile butadiene styrene
- correct answer Definition of ABS
,Oval
- correct answer Cross sectional shape of the interior of Polybutene pipes (PB).
38 mm
- correct answer Minimum size of cleanouts. (mm)
Corporation Stop
- correct 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
- correct answer Type of valve used to prevent backflow or reversal of flow of water, usually found after
the water meter.
Union Patente
- correct 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
- correct 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
- correct answer Type of piping system that is characterized by threading and connecting cast iron pipes
in the building.
Teflon Tape
- correct answer Material used to fuse joints or connections of GI pipes.
Caulking
- correct answer Process of joining the joints and connections of cast iron pipes.
, Motor Oil
- correct answer Type of oil used when threading GI pipes.
Centrifugal Pump
- correct answer Type of pump used for high-rise or mid-rise buildings, when booster or piston pumps
are unavailable or inadequate.
Piston Pump
- correct answer Type of pump used for residential or low-rise buildings, and comes in single action,
double action or twin.
Drum Trap
- correct answer Type of trap that is installed only in bathtubs.
Flushometer Valve
- correct 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
- correct answer Number of teeth per inch in a hacksaw blade used to cut GI pipes.
Looped Vent
- correct answer Type of vent used in an island counter type kitchen sink.
Trap Seal
- correct answer Maximum vertical depth of liquid that a trap can contain.
Sump Pit
- correct answer Type of detention pit usually found in basements, used to gather and discharge waste
water, sometimes with the help of a pump.
Standpipe
- correct answer Vertical pipe that is used for the storage of water, usually contains pressure and is used
for fire suppression.
