WATER SUPPLY SYSTEMS 2026 EXAM TEST QUESTIONS
AND SOLUTIONS RATED A+
✔✔angle of repose - ✔✔The______ is the greatest angle above the horizontal plane at
which material will lie without sliding back into the trench.
✔✔Indirectly - ✔✔In a combination gravity and forced-feed system, water is ______
pumped into the water distribution system.
✔✔Indicator Post - ✔✔A(n)______ is a device attached to a gate valve that provides a
means to operate a buried gate and indicates whether the valve is closed or open.
✔✔Horizontal - ✔✔Double-check backflow prevention assemblies are usually tested
and approved for _______ installations.
✔✔Effective - ✔✔The ______ opening is the minimum cross-sectional area at the point
of water supply discharge measured or expressed in terms of diameter or, if the opening
is not circular, the diameter of a circle of equivalent cross-sectional area.
✔✔Backsiphonage - ✔✔______ backflow is backflow condition in which used,
contaminated, or polluted water from a plumbing fixture or vessel flows back into a
water supply pipe due to pressure being less than atmospheric pressure piping.
✔✔Identification - ✔✔The ______ of building water supply system piping is critical to
the safe operation of the plumbing system and the protection of building occupants.
✔✔accessible - ✔✔_________, when applied to a fixture, connection, appliance, or
equipment, means having access thereto but first may require the removal of an access
panel door, or similar obstruction.
✔✔Variable Frequency Drive - ✔✔A(n)_______ is an electronic device that monitors
and controls the direction, speed, torque, and other operating functions of an electric
motor in addition to providing motor protection.
✔✔Main - ✔✔A trunk-and-branch piping layout is a water piping layout that consists of
a(n)_____, which travels through the building and decreases in size as various
branches of piping are taken off from it.
✔✔Pressure Drop - ✔✔______ is the term used to describe power that is consumed in
moving liquids through piping, fittings, and other system components.
✔✔Control Valve - ✔✔A(n)______ is a fullway gate or ball valve that is intended to be
fully opened or fully closed when in service and isolates a complete piping system or an
individual zone, fixture, or appliance within a system.
, ✔✔Flow Velocities - ✔✔Water pipe sizing has two primary objectives: maintaining
_______ at levels that are appropriate for the type of pipe being installed and matching
pipe sizes to the total demand in WSFUs.
✔✔Approved - ✔✔A reduce-size flexible water connector installed between a supply
pipe and a fixture shall be of a(n)______ type.
✔✔Remote - ✔✔Pipe branches should be sized starting at the most ______ fixture
branch (hot or cold).
✔✔Intermiten - ✔✔_______ water flow is water flow that periodically starts and stops.
✔✔Equivalent Length - ✔✔______ is the friction loss caused by a fitting or valve
equated to the friction loss of a straight length of pipe.
✔✔Pressure - ✔✔______ is force acting on a surface and can be described or
measured as a force per unit of area, or force divided by area.
✔✔Static - ✔✔Where the group of fixtures contains flushometer valves, the ______
pressure for the group shall be not less than 15lbs-force per square inch (psi) (103kPa)
✔✔Rate of Flow - ✔✔______ is the volume of a moving fluid related to time.
✔✔Flat Plate - ✔✔______ collectors are the most common type of solar energy
collectors installed in domestic water heater applications.
✔✔212 degrees Fahrenheit - ✔✔Superheated water is water under pressure that is
heated above ______ degrees F without becoming steam.
✔✔Center - ✔✔A(n)______ flue is a single flue that passes through a water heater tank
from the bottom to the top.
✔✔Hot Water - ✔✔The primary objective of a DHW system is to safely provide ______
to fixtures and appliances at a predetermined temperature
✔✔Scalding - ✔✔______ is an injury caused by exposure to hot water.
✔✔Fusible Plug - ✔✔The ______ temperature and pressure relief valve had a lead plug
that melted when water temperature reached 210 degrees F
✔✔Internal - ✔✔A(n)______ heat exchanger resides in a water heating storage tank
and allows the transfer of heat from an HTF to the potable water without the two liquids
mixing.
AND SOLUTIONS RATED A+
✔✔angle of repose - ✔✔The______ is the greatest angle above the horizontal plane at
which material will lie without sliding back into the trench.
✔✔Indirectly - ✔✔In a combination gravity and forced-feed system, water is ______
pumped into the water distribution system.
✔✔Indicator Post - ✔✔A(n)______ is a device attached to a gate valve that provides a
means to operate a buried gate and indicates whether the valve is closed or open.
✔✔Horizontal - ✔✔Double-check backflow prevention assemblies are usually tested
and approved for _______ installations.
✔✔Effective - ✔✔The ______ opening is the minimum cross-sectional area at the point
of water supply discharge measured or expressed in terms of diameter or, if the opening
is not circular, the diameter of a circle of equivalent cross-sectional area.
✔✔Backsiphonage - ✔✔______ backflow is backflow condition in which used,
contaminated, or polluted water from a plumbing fixture or vessel flows back into a
water supply pipe due to pressure being less than atmospheric pressure piping.
✔✔Identification - ✔✔The ______ of building water supply system piping is critical to
the safe operation of the plumbing system and the protection of building occupants.
✔✔accessible - ✔✔_________, when applied to a fixture, connection, appliance, or
equipment, means having access thereto but first may require the removal of an access
panel door, or similar obstruction.
✔✔Variable Frequency Drive - ✔✔A(n)_______ is an electronic device that monitors
and controls the direction, speed, torque, and other operating functions of an electric
motor in addition to providing motor protection.
✔✔Main - ✔✔A trunk-and-branch piping layout is a water piping layout that consists of
a(n)_____, which travels through the building and decreases in size as various
branches of piping are taken off from it.
✔✔Pressure Drop - ✔✔______ is the term used to describe power that is consumed in
moving liquids through piping, fittings, and other system components.
✔✔Control Valve - ✔✔A(n)______ is a fullway gate or ball valve that is intended to be
fully opened or fully closed when in service and isolates a complete piping system or an
individual zone, fixture, or appliance within a system.
, ✔✔Flow Velocities - ✔✔Water pipe sizing has two primary objectives: maintaining
_______ at levels that are appropriate for the type of pipe being installed and matching
pipe sizes to the total demand in WSFUs.
✔✔Approved - ✔✔A reduce-size flexible water connector installed between a supply
pipe and a fixture shall be of a(n)______ type.
✔✔Remote - ✔✔Pipe branches should be sized starting at the most ______ fixture
branch (hot or cold).
✔✔Intermiten - ✔✔_______ water flow is water flow that periodically starts and stops.
✔✔Equivalent Length - ✔✔______ is the friction loss caused by a fitting or valve
equated to the friction loss of a straight length of pipe.
✔✔Pressure - ✔✔______ is force acting on a surface and can be described or
measured as a force per unit of area, or force divided by area.
✔✔Static - ✔✔Where the group of fixtures contains flushometer valves, the ______
pressure for the group shall be not less than 15lbs-force per square inch (psi) (103kPa)
✔✔Rate of Flow - ✔✔______ is the volume of a moving fluid related to time.
✔✔Flat Plate - ✔✔______ collectors are the most common type of solar energy
collectors installed in domestic water heater applications.
✔✔212 degrees Fahrenheit - ✔✔Superheated water is water under pressure that is
heated above ______ degrees F without becoming steam.
✔✔Center - ✔✔A(n)______ flue is a single flue that passes through a water heater tank
from the bottom to the top.
✔✔Hot Water - ✔✔The primary objective of a DHW system is to safely provide ______
to fixtures and appliances at a predetermined temperature
✔✔Scalding - ✔✔______ is an injury caused by exposure to hot water.
✔✔Fusible Plug - ✔✔The ______ temperature and pressure relief valve had a lead plug
that melted when water temperature reached 210 degrees F
✔✔Internal - ✔✔A(n)______ heat exchanger resides in a water heating storage tank
and allows the transfer of heat from an HTF to the potable water without the two liquids
mixing.
