COSC 325 – Final Exam with Complete
Solutions
Water closet (mounting types) Correct Ans-Floor set and Wall-hung
Water closet (flush devices) Correct Ans-Flush tank
Flushometer valve
ADA compliant water closet seat Correct Ans-between 17'' and 19''
ADA compliant wall-hung urinal Correct Ans-maximum 17''
ADA compliant wall-hung urinal flushometer valve handle Correct Ans-maximum 44''
ADA compliant wall-hung urinal (clear floor space) Correct Ans-Minimum 30''
Wall-hung lavatory knee clearance Correct Ans-Minimum 29''
Drinking fountain knee clearance Correct Ans-Minimum 27''
Urinal (flushing actions) Correct Ans-Washout
Siphon Jet
,Blowout
Lavatory (mounting types) Correct Ans-Wall-hung
Pedestal
Countertop
Electronic faucet (power types) Correct Ans-Battery
Plugged into an electric receptable
Clothes washer outlet box Correct Ans-a plastic encosure that accommodates water supply
and waste connections
Hard water Correct Ans-potable water that conatins excessive amounts of calcium and
magnesium
Water softener Correct Ans-a plumbing appliance that removes dissolved minerals from water
by an ion-exchange process
Water hammer Correct Ans-a water supply system defect in which a loud noise is created
when a quick-closin valve is suddenly closed
Water hammer arrestor Correct Ans-a device installed on water supply pipe near the fixture
with the quick-closing valve to control the effects of water hammer
,Rough-in Correct Ans-the installation of all parts of a plumbing system that can be completed
prior to the installation of the fixtures
Air test Correct Ans-is plumbing system test in which inlets and oulets to the systems are
sealed and air is forced into the system
Air test uniform air pressure Correct Ans-5 PSI
15 mins
Water test Correct Ans-a plumbing system test in which pipe openings are sealed with plugs
or caps and the pipe is filled with water
Conductor Correct Ans-material that has very little resistance and permits electrons to move
through it easily
Insulator Correct Ans-any material that has a very high resistance and resists the flow of
electrons
Generated electricity Correct Ans-the alternating current (AC) created by power plant
generator
Three phase Correct Ans-three distinct wave cycles, 3-wires, 415V
, Single phase Correct Ans-power supply has one distinct wave cycle, single wire, 230V
Service panel Correct Ans-is an electrical device containing fuses or circuit breakers for
protecting the individual circuits of a residence and serves as a means of disconnecting the entire
residence from the distribution system
Circuit Correct Ans-a complete path (when on) for current to take and includes electrical
control devices, circuit protection, conductors, and load(s)
System ground Correct Ans-is a special circuit designed to protect the entire distribution
system of a residence
Equipment ground Correct Ans-is a circuit designed to protect individual components
connected to an electrical system
2 methods for grounding an electrical system Correct Ans-metal water pipe and alternative
electrode
Electrode Correct Ans-is a long metal rod used to make contact with the earth for grounding
purposes
Fuse Correct Ans-an electric overcurrent protection device used to limit the rate of current
flow in a circuit
Solutions
Water closet (mounting types) Correct Ans-Floor set and Wall-hung
Water closet (flush devices) Correct Ans-Flush tank
Flushometer valve
ADA compliant water closet seat Correct Ans-between 17'' and 19''
ADA compliant wall-hung urinal Correct Ans-maximum 17''
ADA compliant wall-hung urinal flushometer valve handle Correct Ans-maximum 44''
ADA compliant wall-hung urinal (clear floor space) Correct Ans-Minimum 30''
Wall-hung lavatory knee clearance Correct Ans-Minimum 29''
Drinking fountain knee clearance Correct Ans-Minimum 27''
Urinal (flushing actions) Correct Ans-Washout
Siphon Jet
,Blowout
Lavatory (mounting types) Correct Ans-Wall-hung
Pedestal
Countertop
Electronic faucet (power types) Correct Ans-Battery
Plugged into an electric receptable
Clothes washer outlet box Correct Ans-a plastic encosure that accommodates water supply
and waste connections
Hard water Correct Ans-potable water that conatins excessive amounts of calcium and
magnesium
Water softener Correct Ans-a plumbing appliance that removes dissolved minerals from water
by an ion-exchange process
Water hammer Correct Ans-a water supply system defect in which a loud noise is created
when a quick-closin valve is suddenly closed
Water hammer arrestor Correct Ans-a device installed on water supply pipe near the fixture
with the quick-closing valve to control the effects of water hammer
,Rough-in Correct Ans-the installation of all parts of a plumbing system that can be completed
prior to the installation of the fixtures
Air test Correct Ans-is plumbing system test in which inlets and oulets to the systems are
sealed and air is forced into the system
Air test uniform air pressure Correct Ans-5 PSI
15 mins
Water test Correct Ans-a plumbing system test in which pipe openings are sealed with plugs
or caps and the pipe is filled with water
Conductor Correct Ans-material that has very little resistance and permits electrons to move
through it easily
Insulator Correct Ans-any material that has a very high resistance and resists the flow of
electrons
Generated electricity Correct Ans-the alternating current (AC) created by power plant
generator
Three phase Correct Ans-three distinct wave cycles, 3-wires, 415V
, Single phase Correct Ans-power supply has one distinct wave cycle, single wire, 230V
Service panel Correct Ans-is an electrical device containing fuses or circuit breakers for
protecting the individual circuits of a residence and serves as a means of disconnecting the entire
residence from the distribution system
Circuit Correct Ans-a complete path (when on) for current to take and includes electrical
control devices, circuit protection, conductors, and load(s)
System ground Correct Ans-is a special circuit designed to protect the entire distribution
system of a residence
Equipment ground Correct Ans-is a circuit designed to protect individual components
connected to an electrical system
2 methods for grounding an electrical system Correct Ans-metal water pipe and alternative
electrode
Electrode Correct Ans-is a long metal rod used to make contact with the earth for grounding
purposes
Fuse Correct Ans-an electric overcurrent protection device used to limit the rate of current
flow in a circuit
