MASTER PLUMBING WSSC PRACTICE
EVALUATION 2026 QUESTION BANK FULL
SOLUTION SET
◉ 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.
EVALUATION 2026 QUESTION BANK FULL
SOLUTION SET
◉ 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.
