WATER DISTRIBUTION SYSTEM Exam
Questions and Answers(SCORED A+)
Water distribution system - ANSWER-A system of pipes, valves, and fixtures for
distributing and using water in a building.
Service Pipe - ANSWER-Pipe from the street water main or other source of water
supply to the building served.
Water meter - ANSWER-Device used to measure in liters or gallons the amount of
water that passes through the water service.
Horizontal supply main - ANSWER-The principal water distribution pipe running from
the water meter from which the various branches and risers to the fixtures are taken.
Riser - ANSWER-A water supply pipe extending vertically to one full story or more to
convey water into pipe branches or plumbing fixtures.
Fixture branch - ANSWER-The water supply pipe between the fixture supply pipe
and the water distributing pipe.
Controls & Valves - ANSWER-Used for controls, isolation and repair of the water
distribution system.
Direct upfeed system - ANSWER-Water is provided by the city water companies
using normal pressure from public water main.
Air pressure system - ANSWER-Used when pressure supplied by city water supply
is inadequate.
Downfeed/ overheadfeed gravity system - ANSWER-Water is pumped into a large
tank on the top of the building and is distributed to the fixtures by means of gravity.
Gate valve - ANSWER-Used mainly to completely close or completely open the
water line.
Globe valve - ANSWER-Controls the flow of water with a movable spindle.
Check valve - ANSWER-Main function is to prevent reversal of flow in the line.
Angle valve - ANSWER-Operates in the same manner as a globe valve and used to
make a 90 degrees turn in the plumbing line.
Butterfly valve - ANSWER-Typically used to regulate a fluid flowing through a section
of pipe and flat circular plate is positioned in the center of the pipe.
Questions and Answers(SCORED A+)
Water distribution system - ANSWER-A system of pipes, valves, and fixtures for
distributing and using water in a building.
Service Pipe - ANSWER-Pipe from the street water main or other source of water
supply to the building served.
Water meter - ANSWER-Device used to measure in liters or gallons the amount of
water that passes through the water service.
Horizontal supply main - ANSWER-The principal water distribution pipe running from
the water meter from which the various branches and risers to the fixtures are taken.
Riser - ANSWER-A water supply pipe extending vertically to one full story or more to
convey water into pipe branches or plumbing fixtures.
Fixture branch - ANSWER-The water supply pipe between the fixture supply pipe
and the water distributing pipe.
Controls & Valves - ANSWER-Used for controls, isolation and repair of the water
distribution system.
Direct upfeed system - ANSWER-Water is provided by the city water companies
using normal pressure from public water main.
Air pressure system - ANSWER-Used when pressure supplied by city water supply
is inadequate.
Downfeed/ overheadfeed gravity system - ANSWER-Water is pumped into a large
tank on the top of the building and is distributed to the fixtures by means of gravity.
Gate valve - ANSWER-Used mainly to completely close or completely open the
water line.
Globe valve - ANSWER-Controls the flow of water with a movable spindle.
Check valve - ANSWER-Main function is to prevent reversal of flow in the line.
Angle valve - ANSWER-Operates in the same manner as a globe valve and used to
make a 90 degrees turn in the plumbing line.
Butterfly valve - ANSWER-Typically used to regulate a fluid flowing through a section
of pipe and flat circular plate is positioned in the center of the pipe.
