Alaska Plumbing Exam Prep FREE Sample Exam — Fixed Set

An estimator totals DFU for a small motel and then warns the owner that the drain will flow at exactly that many gallons per minute whenever the building is occupied. What is wrong with the warning?

Nothing — DFU totals convert directly to a constant occupied flow

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The warning understates flow; DFU must be doubled to get gpm

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A DFU total is a probability-based design load, not a direct or constant flow rate

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DFU applies only when the building is unoccupied

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A client asks why the plumber’s bathroom-group design does not run a separate dry vent up from every fixture, and whether the shared arrangement leaves any trap unprotected. Which answer is accurate?

The shared arrangement is a shortcut that leaves the water closet trap unprotected, since no vent rises from the closet itself

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The design wet-vents the bathroom group: an oversized drain serving one fixture vents another, so each trap is protected through the shared pipe

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Any trap not on its own dry vent is by definition unprotected

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The design relies on the building's single main vent alone to protect every trap in the group, with no local venting at all

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A reduced-pressure principle assembly’s relief port dribbles during a test after one check fouls with debris. Why does that discharge demonstrate the assembly is still protecting the supply?

The port drains the supply line so pressure cannot build

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The differential relief valve between the two independent checks opens and dumps the zone between them, so a fouled check cannot silently pass contamination through

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The discharge proves both checks have failed and protection is lost

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The relief valve is a pressure-reducing valve regulating the building

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A 45° offset has a set of 9 inches. What is the travel length before fitting allowances?

9.00 in.

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23.52 in.

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12.73 in.

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6.36 in.

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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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An integral-trap urinal flushing 1.0 gallon per flush is installed in an assembly occupancy. What drainage fixture unit value does it carry?

6 DFU

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5 DFU

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2 DFU

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3 DFU

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A bathroom group is laid out so a single vented lavatory provides the wet vent path for the rest of the group. Is that arrangement within the horizontal wet vent method?

No — the wet vent for a group must always be provided by the bathtub

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No — a lavatory may vent only itself and may never wet vent other fixtures

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Yes, but only where the lavatory is the fixture farthest from the water closet

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Yes — one or two vented lavatories may serve as the wet vent for a bathroom group

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A 1-1/4-inch trap arm turns 30 degrees, then 30 degrees, then 30 degrees. With no cleanout, how much turning capacity remains?

30 degrees; each individual turn is counted separately

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90 degrees; the cap resets after each fitting

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None; the three turns already total the 90-degree limit.

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45 degrees; small arms are allowed 135 degrees in total

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A specialty appliance needing a water supply does not appear in the fixture-unit table. How is its supply sizing determined?

It is assigned 1.0 fixture unit by default until the manufacturer publishes a value

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It is sized at the largest value in the table to be safe

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It may be connected without sizing because unlisted fixtures carry no demand

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It is sized by reference to a listed fixture having a similar flow rate and frequency of use

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Appliances in an enclosure have a combined input of 120,000 Btu/h, and combustion air is to be supplied by the standard indoor-volume method. What minimum room volume does the method require?

6,000 cubic feet

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2,400 cubic feet

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5,000 cubic feet

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12,000 cubic feet

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What is the minimum passing score on the department’s plumbing certificate examinations, and how long must a failed applicant wait before reexamination?

75 percent, with a 30-day wait before reexamination after failing

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70 percent, with no waiting period before reexamination

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80 percent, with a 90-day wait before reexamination after failing

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70 percent, with a 30-day wait before reexamination after failing

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A restricted utility applicant claims 600 hours of military experience, 200 hours of trade-related classroom training, and 200 hours of qualifying line installation. How many hours are counted after the restricted utility caps are applied?

1,000 hours, because the claimed total equals the amount required

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600 hours, because only the military experience is counted here

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925 hours, because the classroom hours are not capped in this case

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825 hours, because both capped categories are reduced to their limits

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Alaska Plumbing Exam Prep FREE Sample Exam — Fixed Set

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