Master Plumber Exam 1 Questions and Answers Fully Solved Latest Version 2025-2026
Sewage Ejector - Answers Type of pump that discharges waste in the sump pit and transfers
the waste to the house drain. (Max Fajardo)
503 mm - Answers Minimum dimension of a septic tank manhole.
Industrial drain - Answers drain that discharges objectionable waste such as acids and other
chemicals from industrial equipment .
75 mm - Answers Minimum diameter of pipe of any water closet.
3 - Answers Maximum number of water closets able to discharge into a shared 75mm diameter
horizontal soil branch
Combination Sewer - Answers Type of sewer that discharges both storm water and sewage
from households, rendered obsolete due to the health hazards it poses
Septic Tank - Answers 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 - Answers Term defined as the settling down or separation of solid matter
suspended in a liquid.
1% - Answers Minimum slope or grade (in %) permitted with 100mm (4'') pipes.
Scum - Answers Lighter organic solid particles found in sewage, cesspools and septic tanks,
found floating on the liquid.
Sludge - Answers Term defined as the organic particles that have settled down in septic tanks,
cesspools or sewage.
900 mm - Answers Minimum WIDTH of a septic tank for residential dwellings. (mm)
1500 mm - Answers Minimum LENGTH of a septic tank for residential dwellings. (mm)
1200 mm - Answers Minimum DEPTH of a septic tank for residential dwellings. (mm)
Hair - Answers Leading cause of pipe clogs in waste and soil pipes.
Drainage, Waste and Vent - Answers Definition of DWV
Acrylonitrile butadiene styrene - Answers Definition of ABS
Oval - Answers Cross sectional shape of the interior of Polybutene pipes (PB).
,38 mm - Answers Minimum size of cleanouts. (mm)
Corporation Stop - Answers 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 - Answers Type of valve used to prevent backflow or reversal of flow of water,
usually found after the water meter.
Union Patente - Answers 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 - Answers 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 - Answers Type of piping system that is characterized by threading and
connecting cast iron pipes in the building.
Teflon Tape - Answers Material used to fuse joints or connections of GI pipes.
Caulking - Answers Process of joining the joints and connections of cast iron pipes.
Motor Oil - Answers Type of oil used when threading GI pipes.
Centrifugal Pump - Answers Type of pump used for high-rise or mid-rise buildings, when booster
or piston pumps are unavailable or inadequate.
Piston Pump - Answers Type of pump used for residential or low-rise buildings, and comes in
single action, double action or twin.
Drum Trap - Answers Type of trap that is installed only in bathtubs.
Flushometer Valve - Answers 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 - Answers Number of teeth per inch in a hacksaw blade used to cut GI pipes.
Looped Vent - Answers Type of vent used in an island counter type kitchen sink.
Trap Seal - Answers Maximum vertical depth of liquid that a trap can contain.
Sump Pit - Answers Type of detention pit usually found in basements, used to gather and
discharge waste water, sometimes with the help of a pump.
Standpipe - Answers Vertical pipe that is used for the storage of water, usually contains
pressure and is used for fire suppression.
,Return Bend - Answers Type of pipe with a 180 degree bend.
2 - Answers Water Supply Fixture unit of a bath tub.
2 - Answers Water Supply Fixture unit of a shower
38 mm - Answers Diameter of pipe used for bath tub drum traps. (Max Fajardo, p. 172) (mm)
38 mm - Answers Diameter of pipe used for wash basins / lavatories. (Max Fajardo, p. 172)
(mm)
75 mm - Answers Diameter of pipe used for water closets. (Max Fajardo, p. 172) (mm)
50 mm - Answers Diameter of pipe used for floor drains. (Max Fajardo, p. 172) (mm)
Bleeder - Answers Type of connection found in a looped vent, connecting the looped vent pipe
to the waste pipe.
50% - Answers Percentage required of liquid flow for a waste or soil pipe to have adequate
drainage or discharge.
Circuit Vent - Answers Type of vent that connects a battery of fixtures to a stack vent.
Privy - Answers A concrete sealed vault with a wooden shelter constructed for the collection of
raw sewage.
Cesspool - Answers Hole in the ground curbed with stones, bricks, CHB or other materials to
allow raw contaminated sewage to leach into the ground.
Trap Seal Loss - Answers A common problem in traps due to inadequate ventilation.
Unit Vent - Answers Type of vent that is shared by two fixtures of the same type.
Solvent System - Answers Type of system used in plumbing that eliminates the vent stack,
relying of downward pressure and suction.
The waste and sewage discharges form slug-like (bullet) pressings or pressure.
volume/flow rate - Answers Formula for detention time of a tank
national master plumbers association of the philippines - Answers NAMPAP
shut off valve - Answers a gate valve normally used to shut off flow of water from supply pipe
key cock - Answers a faucet normally turned 90 degrees to open or close
indirect system - Answers overhead tank water distribution system is a _____ system
, jack pump - Answers pump normally used for farm purposes
centrifugal rotary - Answers pumps with turbines
building design
occupants
heating capacity - Answers things to consider when sizing the hot water tank
4"? - Answers minimum house drain diameter
.5 - Answers pipe sleeves must be ___ x the size of a pipe they protect
lead - Answers cleanout plugs must be made of
2 - Answers minimum " for underground drainage pipe
100 - Answers temperature needed to be considered hot water ___ C
bedpan washer - Answers aka clinical sink
2 - Answers minimum water service connections for hospital
backflow prevention device - Answers sillcocks require a ____
private water source - Answers a well is considered mostly as a ____
6 - Answers maximum distance in ft a 2 in trap from its vent
.02 - Answers maximum allowable % for soldered connections with lead pipe joints
8 - Answers maximum allowable % for soldered connections with lead
12 - Answers minimum ' clearance infront of a cleanout
10 - Answers minimum ' clearance from a terminal and a window opening in a building
6 - Answers maximum pipe side diameter not needing an effing manhole
1" - Answers recommended size of MWSS for service pipe in 2 storey residential
3/4 - Answers minimum water supply size for flush valve urinal
1 - Answers minimum water supply pipe diameter size " for flushometer valve water closet
1/2 - Answers minimum water supply pipe diameter size " for water closet without flushometer
valve
potability - Answers first steps in selecting water source
Sewage Ejector - Answers Type of pump that discharges waste in the sump pit and transfers
the waste to the house drain. (Max Fajardo)
503 mm - Answers Minimum dimension of a septic tank manhole.
Industrial drain - Answers drain that discharges objectionable waste such as acids and other
chemicals from industrial equipment .
75 mm - Answers Minimum diameter of pipe of any water closet.
3 - Answers Maximum number of water closets able to discharge into a shared 75mm diameter
horizontal soil branch
Combination Sewer - Answers Type of sewer that discharges both storm water and sewage
from households, rendered obsolete due to the health hazards it poses
Septic Tank - Answers 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 - Answers Term defined as the settling down or separation of solid matter
suspended in a liquid.
1% - Answers Minimum slope or grade (in %) permitted with 100mm (4'') pipes.
Scum - Answers Lighter organic solid particles found in sewage, cesspools and septic tanks,
found floating on the liquid.
Sludge - Answers Term defined as the organic particles that have settled down in septic tanks,
cesspools or sewage.
900 mm - Answers Minimum WIDTH of a septic tank for residential dwellings. (mm)
1500 mm - Answers Minimum LENGTH of a septic tank for residential dwellings. (mm)
1200 mm - Answers Minimum DEPTH of a septic tank for residential dwellings. (mm)
Hair - Answers Leading cause of pipe clogs in waste and soil pipes.
Drainage, Waste and Vent - Answers Definition of DWV
Acrylonitrile butadiene styrene - Answers Definition of ABS
Oval - Answers Cross sectional shape of the interior of Polybutene pipes (PB).
,38 mm - Answers Minimum size of cleanouts. (mm)
Corporation Stop - Answers 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 - Answers Type of valve used to prevent backflow or reversal of flow of water,
usually found after the water meter.
Union Patente - Answers 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 - Answers 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 - Answers Type of piping system that is characterized by threading and
connecting cast iron pipes in the building.
Teflon Tape - Answers Material used to fuse joints or connections of GI pipes.
Caulking - Answers Process of joining the joints and connections of cast iron pipes.
Motor Oil - Answers Type of oil used when threading GI pipes.
Centrifugal Pump - Answers Type of pump used for high-rise or mid-rise buildings, when booster
or piston pumps are unavailable or inadequate.
Piston Pump - Answers Type of pump used for residential or low-rise buildings, and comes in
single action, double action or twin.
Drum Trap - Answers Type of trap that is installed only in bathtubs.
Flushometer Valve - Answers 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 - Answers Number of teeth per inch in a hacksaw blade used to cut GI pipes.
Looped Vent - Answers Type of vent used in an island counter type kitchen sink.
Trap Seal - Answers Maximum vertical depth of liquid that a trap can contain.
Sump Pit - Answers Type of detention pit usually found in basements, used to gather and
discharge waste water, sometimes with the help of a pump.
Standpipe - Answers Vertical pipe that is used for the storage of water, usually contains
pressure and is used for fire suppression.
,Return Bend - Answers Type of pipe with a 180 degree bend.
2 - Answers Water Supply Fixture unit of a bath tub.
2 - Answers Water Supply Fixture unit of a shower
38 mm - Answers Diameter of pipe used for bath tub drum traps. (Max Fajardo, p. 172) (mm)
38 mm - Answers Diameter of pipe used for wash basins / lavatories. (Max Fajardo, p. 172)
(mm)
75 mm - Answers Diameter of pipe used for water closets. (Max Fajardo, p. 172) (mm)
50 mm - Answers Diameter of pipe used for floor drains. (Max Fajardo, p. 172) (mm)
Bleeder - Answers Type of connection found in a looped vent, connecting the looped vent pipe
to the waste pipe.
50% - Answers Percentage required of liquid flow for a waste or soil pipe to have adequate
drainage or discharge.
Circuit Vent - Answers Type of vent that connects a battery of fixtures to a stack vent.
Privy - Answers A concrete sealed vault with a wooden shelter constructed for the collection of
raw sewage.
Cesspool - Answers Hole in the ground curbed with stones, bricks, CHB or other materials to
allow raw contaminated sewage to leach into the ground.
Trap Seal Loss - Answers A common problem in traps due to inadequate ventilation.
Unit Vent - Answers Type of vent that is shared by two fixtures of the same type.
Solvent System - Answers Type of system used in plumbing that eliminates the vent stack,
relying of downward pressure and suction.
The waste and sewage discharges form slug-like (bullet) pressings or pressure.
volume/flow rate - Answers Formula for detention time of a tank
national master plumbers association of the philippines - Answers NAMPAP
shut off valve - Answers a gate valve normally used to shut off flow of water from supply pipe
key cock - Answers a faucet normally turned 90 degrees to open or close
indirect system - Answers overhead tank water distribution system is a _____ system
, jack pump - Answers pump normally used for farm purposes
centrifugal rotary - Answers pumps with turbines
building design
occupants
heating capacity - Answers things to consider when sizing the hot water tank
4"? - Answers minimum house drain diameter
.5 - Answers pipe sleeves must be ___ x the size of a pipe they protect
lead - Answers cleanout plugs must be made of
2 - Answers minimum " for underground drainage pipe
100 - Answers temperature needed to be considered hot water ___ C
bedpan washer - Answers aka clinical sink
2 - Answers minimum water service connections for hospital
backflow prevention device - Answers sillcocks require a ____
private water source - Answers a well is considered mostly as a ____
6 - Answers maximum distance in ft a 2 in trap from its vent
.02 - Answers maximum allowable % for soldered connections with lead pipe joints
8 - Answers maximum allowable % for soldered connections with lead
12 - Answers minimum ' clearance infront of a cleanout
10 - Answers minimum ' clearance from a terminal and a window opening in a building
6 - Answers maximum pipe side diameter not needing an effing manhole
1" - Answers recommended size of MWSS for service pipe in 2 storey residential
3/4 - Answers minimum water supply size for flush valve urinal
1 - Answers minimum water supply pipe diameter size " for flushometer valve water closet
1/2 - Answers minimum water supply pipe diameter size " for water closet without flushometer
valve
potability - Answers first steps in selecting water source
