Arizona Plumbing Exam Prep FREE Sample Exam — Fixed Set

A small ejector pump serving a basement fixture group discharges continuously at 4 gpm into the drainage system. How is that flow converted for sizing?

At 1 DFU per gpm, for 4 DFU

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It is ignored because it is pumped, not gravity

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At 2 DFU per gpm, for 8 DFU

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At 7.5 DFU per gpm, for 30 DFU

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A dry vent serves a group whose highest flood-level rim is at 40 inches above the floor. The vent is roughed to turn horizontal at 44 inches. How much higher must the vertical rise go before the turn is permitted?

At least 2 inches more, to reach 6 inches above the rim

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It may turn now; it is already above the rim

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At least 6 inches more, for a full second clearance

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It must rise to the ceiling regardless of rim height

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Two otherwise identical school buildings are being sized. One uses flush-tank water closets throughout and the other uses flush-valve water closets throughout, and both total the same number of water supply fixture units. How should their probable peak demands compare?

The flush-tank building will show the higher peak demand in gallons per minute

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Both buildings will show exactly the same peak demand

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The flush-valve building will show the higher peak demand in gallons per minute

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The building with fewer floors will always show the higher demand regardless of flushing method

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A pressure gauge reads 30 psi at the base of a water column. How tall is the column?

12.99 ft

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30.0 ft

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138.6 ft

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69.3 ft

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A homeowner reports that ever since a pressure-reducing valve was installed last year, the house pressure creeps up overnight – after the evening’s water heating, with no water being used – and the heater’s relief valve occasionally drips. Nothing is wrong with the PRV’s daytime readings. What is happening?

The PRV is failing open overnight and must be replaced

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Thermal expansion in the now-closed system: heated water cannot push back past the PRV, so pressure builds until the relief valve drips – an expansion tank is the correction

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The city raises its street pressure at night, which the PRV cannot affect

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The relief valve is oversized for the heater

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A new clinic’s only floor sits entirely above the elevation of the cover of the next upstream manhole in the public sewer. The designer specifies a backwater valve on the building drain anyway. What is the correct ruling?

Permitted as extra protection

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Required whenever a clinic has below-grade piping

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Permitted if the valve is accessible

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Not permitted; fixtures above that elevation shall not discharge through a backwater valve

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A circuit-vented branch receives five water closets and connects to a drainage stack that also receives waste from upper branches. What additional vent is required?

A second circuit vent at the downstream end

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A relief vent connecting between the stack and the most downstream fixture drain

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An air admittance valve at each water closet

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No additional vent — circuit venting is complete as installed

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An installer proposes joining a CPVC distribution line to a PVC line with solvent cement, and supporting a branch with a saddle-type fitting. How many of these two proposals are permitted?

Both are permitted

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Neither — both are on the list of prohibited joints and connections

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Only the saddle fitting

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Only the solvent-cement joint between the two plastics

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A combined primary-and-secondary roof drain assembly is installed so both systems share one common outlet body to save piping. What does the IPC require?

A shared outlet is permitted if it is sized for both systems together and is provided with a cleanout where the two systems join above the roof drain body

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A shared inlet is permitted if the outlets are independent and each outlet is sized for the full design flow of its own drainage system

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Combined primary and secondary assemblies must have independent inlets and independent outlets

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Independence is required only for scuppers, not for drain assemblies, because a drain body can be rodded from the roof when it becomes blocked

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A 5-inch building sewer runs 320 feet from an existing cleanout at the building drain/building sewer junction. The sewer makes one change of horizontal direction greater than 45 degrees at the 160-foot point. What is the minimum number of additional cleanouts required?

2

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4

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5

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3

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A CR-37 licensee tells a homeowner the dual license gives them the full residential scope of R-37 Plumbing, Including Solar. Why is that wrong?

The dual license pairs the commercial C-37 scope with the R-37R residential scope, not with the R-37 including solar scope

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The dual license covers commercial work only, and residential work needs the separate R-37 license

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The dual license pairs C-37 with R-37 including solar, but solar work itself needs a C-78 license

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The dual license actually pairs the C-77 scope with the R-37R scope, so the licensee has the pair backwards

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What is the renewal fee for an Arizona Specialty Commercial contractor’s license for its two-year term?

$480

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$580

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$540

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$650

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Arizona Plumbing Exam Prep FREE Sample Exam — Fixed Set

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