01. A cold-climate distribution warehouse is assembling the plumbing schedule that will support its indoor water use documentation. The reviewer asks the team to list the fittings separately from the fixtures they serve, so that each group can be described by the measure that applies to it.
Which item belongs on the fittings list?
a) The service sink in the janitorial room
b) The faucet serving a lavatory basin
c) The water closet in a single-occupant restroom
d) The lavatory basin that receives the water
02. A core and shell office tower is building out base-building restrooms; the tenant suites will be fitted out later under separate contracts. The team is preparing the indoor water use documentation for the fittings and fixtures in its own scope and has been asked how it will show a reduction at all.
What does that demonstration consist of?
a) Running one set of occupancy and use assumptions through a reference set of fixture ratings and through the specified ratings, then comparing the totals.
b) Measuring the specified fittings against the ratings carried by the building that previously occupied the site.
c) Comparing the first full year of metered consumption against the volume the design team estimated before construction began, and reporting the difference as the reduction.
d) Benchmarking the tower's total against the consumption reported for offices of a comparable size in the same city.
03. A developer is deciding which of two data center projects should carry a condensate recovery system in its budget. One sits on a hot, humid coast where the air handling units run in cooling mode nearly year round; the other sits in a high desert where the outdoor air is dry and free cooling covers much of the year. The two buildings have the same floor area, the same cooling equipment and the same makeup water demand.
Which factor most directly determines how much condensate each project can recover?
a) The efficiency of the cooling plant, since an efficient machine does the same work on less energy.
b) The temperature the chilled water is supplied at, since a colder coil surface drives more heat out of the air on every pass.
c) The moisture the coils pull out of the air they treat, which tracks outdoor humidity and hours of operation.
d) The floor area and the number of air handling units serving it, since a larger conditioned volume sends more air across the coils.
04. A hospital tower in a humid subtropical city plans to reuse graywater for toilet flushing. The plumbing engineer has to tell the architect which drains route to the collection and treatment room, and what that routing does to the riser layout.
Which streams may be collected as graywater, and what does collecting them require of the drainage design?
a) Condensate from the air handling units and the fan coils, piped down to the same tank that feeds the flushing system.
b) Rainwater from the tower roof and the podium terraces, stored in a cistern and blended into the reclaimed distribution.
c) Wastewater from the lavatories, showers, water closets and kitchen sinks, gathered in the single sanitary drain and treated to the quality flushing needs.
d) Wastewater from the lavatories, showers and laundry, carried in drainage kept separate from the water closet and kitchen waste lines, then treated before it is reused.
05. A large-format retail store in a cold climate includes an in-store bakery and a delicatessen. The plumbing engineer reports that the restroom fittings and the hand sinks have been taken as far as the schedule allows. The kitchen consultant is still choosing the dishwashing line, the ice machines and the combination ovens.
Where does the store's remaining indoor water reduction most plausibly sit?
a) In the kitchen equipment selection, since each unit's water use follows the model chosen.
b) In the water treatment feeding the store, since softening and filtration discharge a share of everything they process.
c) In the restroom fittings, once the ratings applied to the hand sinks are extended to the customer restrooms on the sales floor.
d) In the fixture use assumptions, by lowering the number of daily uses the calculation assigns to the store's staff.
06. A new civic building distributes treated nonpotable water to its water closets and to hose bibbs in the service yard. That distribution shares chases with the potable service, is run in marked and distinctly colored pipe, and carries backflow prevention where the two systems come close.
What are the marking and the backflow prevention there to accomplish?
a) To show the plumbing inspector where the reclaimed line runs once the walls close.
b) To tell maintenance staff which line should be isolated when a fixture is serviced.
c) To keep nonpotable water out of the potable distribution.
d) To hold the nonpotable and the potable systems at matching pressure.
07. A resort hotel in a hot, humid climate is surveying its back-of-house water use. Several ice machines and the walk-in refrigeration condensers draw potable water continuously, pass it over the equipment to pick up heat, and send it straight to the sanitary drain. The team is deciding where to start.
What makes that stream the strongest candidate for elimination rather than reduction?
a) The equipment can be scheduled to run overnight, so the same cooling is delivered when the hotel draws least water.
b) The stream is easy to meter separately from the guest rooms, so a saving can be documented without reopening the fixture schedule or the occupancy counts.
c) The water is doing nothing but carrying heat, so an air-cooled or closed-loop unit removes the demand instead of trimming it.
d) The discharge leaves warm, so the drainage system has to be given the capacity to carry it away without raising the temperature at the treatment works.
08. A secondary school sits in a climate whose rain falls almost entirely between late autumn and early spring. Roof runoff is collected in a cistern and piped to the water closets, and an automatic connection to the potable service tops the tank up whenever the stored volume runs low. Through the wet months the cistern carries the flushing demand on its own; through the dry half of the year it stands close to empty and the potable connection supplies the fixtures.
What should the project's reported water use reduction be based on?
a) The reduction the cistern achieves in the months it carries the demand, with the dry half set aside as an operating matter.
b) The potable water the harvested supply actually displaces over a full year.
c) The whole flushing demand served through the nonpotable distribution.
d) The volume the cistern holds when it is full, set against the school's daily flushing demand.
09. A university science building has been occupied for two years. Its water service is read once each billing period, and the totals have crept upward with no change in occupancy, in the operating schedule, or in the laboratory equipment. Facilities suspects a leak in a buried line but has nothing that would confirm one.
What does the metering have to resolve before a leak like this can be found?
a) Consumption recorded across the hours of the day, so flow that continues while the building draws none becomes visible.
b) Consumption compared with the same period a year earlier, so a rise the operating staff cannot account for stands out in the totals.
c) Consumption checked against the meter's calibration record, so a drifting instrument is ruled out first.
d) Consumption divided among the building's wings, so the area holding the buried line can be narrowed.
10. A suburban school district is renovating the grounds of an elementary campus in a temperate climate where summer thunderstorms are common. Irrigation runs from a clock that waters every zone for a fixed time on set evenings, year round. Grounds staff report standing water on the fields the morning after a storm, and the renovation scope leaves the planting as it is.
Which change to the control system most directly reduces the water the landscape draws?
a) A rain shutoff device that suspends the cycle while rain is falling, so the clock resumes its programmed schedule afterward.
b) Moving the watering window into the early morning hours, so less of each cycle evaporates before reaching the soil.
c) Pressure regulators and matched nozzles on every zone, so each head operates in the range its manufacturer specifies.
d) A controller that sets run times from local weather data and soil moisture readings, so a zone is skipped when the ground is already wet.