1
MASTER PLUMBING WSSC QUESTIONS WITH
COMPLETE SOLUTIONS 100% VERIFIED GRADED
A+ 2025✓
Who is responsible for maintaining the plumbing system in a safe condition?
Ans: The owner or owner's agent is responsible.
Before work commences when must a permit be obtained?
Ans: A permit must be obtained or a 100% (Double the normal fee) will be
charged.
Underground Piping
Ans: All underground piping shall be left uncovered until inspected.
Inspector's Authority
Ans: The inspector has authority to stop work being done dangerously or
unsafely.
Air Gap
Ans: The vertical distance between the opening of the water supply and
flood level rim of a receptacle.
Branch
Ans: Any part of the piping system except mains, stacks or risers.
Pretest - Stuvia US
,2
Branch Vent
Ans: A vent connecting individual vents with a stack vent or vent stack.
Building Drain
Ans: The lowest part of a drainage system which receives waste from soil and
waste pipes and connects to the building sewer.
Building Sewer
Ans: Drainage piping that conveys waste from the building drain to the
public sewer or disposal system.
Cleanout
Ans: Access opening in the drainage system used to remove obstructions.
Combination Fixture
Ans: Two or three compartment sink drained by a continuous waste
connected to one trap.
Combinate Waste and Vent System
Ans: Horizontal wet venting system for sinks and floor drains.
Common Vent
Ans: A single vent serving as the vent for two fixture drains.
Critical Level
Pretest - Stuvia US
, 3
Ans: Is an elevation mark on a vacuum breaker setting the minimum
elevation device can be installed above the flood level rim of a fixture.
Cross Connection
Ans: Is an actual or potential tie between potable water and any source of
pollution or contamination.
Developed Length
Ans: A measurement of piping taken along the centerline of pipe and fittings
Drain
Ans: any pipe that conveys waste water in the drainage system.
Indirect Waste
Ans: Waste pipe that drains through an air gap to the drainage system.
Individual Vent
Ans: A pipe installed to vent a fixture trap. It may connect to the vent system
above the fixture or terminate in the open air.
Main
Ans: Is the primary or principal pipe that drains through an air gap to the
drainage system.
Potable Water
Pretest - Stuvia US
MASTER PLUMBING WSSC QUESTIONS WITH
COMPLETE SOLUTIONS 100% VERIFIED GRADED
A+ 2025✓
Who is responsible for maintaining the plumbing system in a safe condition?
Ans: The owner or owner's agent is responsible.
Before work commences when must a permit be obtained?
Ans: A permit must be obtained or a 100% (Double the normal fee) will be
charged.
Underground Piping
Ans: All underground piping shall be left uncovered until inspected.
Inspector's Authority
Ans: The inspector has authority to stop work being done dangerously or
unsafely.
Air Gap
Ans: The vertical distance between the opening of the water supply and
flood level rim of a receptacle.
Branch
Ans: Any part of the piping system except mains, stacks or risers.
Pretest - Stuvia US
,2
Branch Vent
Ans: A vent connecting individual vents with a stack vent or vent stack.
Building Drain
Ans: The lowest part of a drainage system which receives waste from soil and
waste pipes and connects to the building sewer.
Building Sewer
Ans: Drainage piping that conveys waste from the building drain to the
public sewer or disposal system.
Cleanout
Ans: Access opening in the drainage system used to remove obstructions.
Combination Fixture
Ans: Two or three compartment sink drained by a continuous waste
connected to one trap.
Combinate Waste and Vent System
Ans: Horizontal wet venting system for sinks and floor drains.
Common Vent
Ans: A single vent serving as the vent for two fixture drains.
Critical Level
Pretest - Stuvia US
, 3
Ans: Is an elevation mark on a vacuum breaker setting the minimum
elevation device can be installed above the flood level rim of a fixture.
Cross Connection
Ans: Is an actual or potential tie between potable water and any source of
pollution or contamination.
Developed Length
Ans: A measurement of piping taken along the centerline of pipe and fittings
Drain
Ans: any pipe that conveys waste water in the drainage system.
Indirect Waste
Ans: Waste pipe that drains through an air gap to the drainage system.
Individual Vent
Ans: A pipe installed to vent a fixture trap. It may connect to the vent system
above the fixture or terminate in the open air.
Main
Ans: Is the primary or principal pipe that drains through an air gap to the
drainage system.
Potable Water
Pretest - Stuvia US
