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AR Plumber practice questions

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Question 1Arkansas Plumbing Law, Rules, and Licensing Requirements

Under Arkansas plumbing law, a person who installs or repairs plumbing for compensation must generally hold which of the following?

  1. a federal plumbing registration card
  2. a real estate salesperson license
  3. a valid plumber license issued by the state Correct answer.
  4. only a general business license from the county

Explanation

Arkansas requires a state-issued plumber license before a person may perform plumbing work for compensation. A local business license or other occupational credential does not authorize plumbing work. The licensing program is administered by the state plumbing authority.

Question 2Arkansas Plumbing Law, Rules, and Licensing Requirements

Before installing a new water supply line in a building in Arkansas, the plumber should normally do which of the following?

  1. begin the work and notify the inspector afterward
  2. wait until the building is occupied
  3. obtain a plumbing permit from the local authority Correct answer.
  4. file a deed with the county clerk

Explanation

A plumbing permit must be obtained before work begins so the installation can be inspected at the required stages. Permits are issued by the local authority that enforces the plumbing code.

Question 3Arkansas Plumbing Law, Rules, and Licensing Requirements

Plumbing work performed in Arkansas must comply with which of the following?

  1. the plumbing code of any neighboring state
  2. only the manufacturer's installation instructions
  3. the Arkansas Plumbing Code adopted by the state Correct answer.
  4. voluntary guidelines that have no legal force

Explanation

Arkansas adopts a statewide plumbing code that governs installations, and compliance is mandatory. Manufacturer instructions are important but do not replace the adopted code.

Question 4Arkansas Plumbing Law, Rules, and Licensing Requirements

An apprentice plumber in Arkansas may perform plumbing work under which of the following conditions?

  1. without any oversight once registered with the state
  2. only after passing the master plumber examination
  3. only on weekends when inspectors are off duty
  4. under the supervision of a licensed journeyman or master plumber Correct answer.

Explanation

Apprentices are learning plumbers and must work under the supervision of a licensed journeyman or master plumber. They may not perform plumbing independently.

Question 5Arkansas Plumbing Law, Rules, and Licensing Requirements

What does a master plumber license allow a holder to do?

  1. perform electrical work in the same building
  2. replace the need for any journeyman license on a job
  3. supervise plumbing work and qualify a plumbing business Correct answer.
  4. be issued automatically after two years as an apprentice

Explanation

The master plumber license is the highest level of plumbing licensure and allows the holder to supervise plumbing work and serve as the qualifying licensee for a plumbing business. Journeymen and apprentices work under that supervision.

Question 6Arkansas Plumbing Law, Rules, and Licensing Requirements

After rough-in plumbing is installed, the next required step is ordinarily to do which of the following?

  1. request an inspection before the work is concealed Correct answer.
  2. cover the piping with drywall immediately
  3. wait for the certificate of occupancy
  4. submit a final as-built drawing to the state

Explanation

Rough-in inspections must occur before piping is covered so the inspector can verify code compliance. Concealing work before inspection is a violation.

Question 7Arkansas Plumbing Law, Rules, and Licensing Requirements

If a person advertises plumbing services without a state license, the state may do which of the following?

  1. refer the matter to the federal EPA
  2. take no action because advertising is protected speech
  3. only send a warning letter once per year
  4. pursue penalties, including fines and injunctive relief Correct answer.

Explanation

Advertising or performing plumbing without a license violates the state licensing law and can result in fines, injunctions, and other enforcement action. Commercial advertising is not exempt from licensing enforcement.

Question 8Arkansas Plumbing Law, Rules, and Licensing Requirements

As a condition of license renewal, Arkansas plumbers are generally required to do which of the following?

  1. provide a surety bond to the state
  2. complete approved continuing education Correct answer.
  3. join a recognized trade union
  4. retake the full licensing examination every year

Explanation

Continuing education is a common renewal condition for licensed plumbers, keeping them current on code changes and safety practices. Failing to complete the required hours can block renewal.

Question 9Arkansas Plumbing Law, Rules, and Licensing Requirements

A plumber whose license has expired but who continues to perform plumbing work is doing which of the following?

  1. allowed to continue until the next renewal notice arrives
  2. exempt from licensure if working for a licensed contractor
  3. practicing without a valid license and subject to penalties Correct answer.
  4. still licensed because renewal is only a formality

Explanation

A plumber must hold a current license; working after expiration is unlicensed practice and can lead to fines or other discipline. An employer's license does not cover the individual.

Question 10Arkansas Plumbing Law, Rules, and Licensing Requirements

When asked by an inspector or official, a licensed plumber in Arkansas should be able to produce which of the following?

  1. the state-issued plumbing license or card upon request Correct answer.
  2. a federal plumbing identification badge
  3. a driver's license only
  4. a notarized letter from the mayor

Explanation

Licensed plumbers must be able to verify licensure, typically by producing the state-issued license or wallet card. Inspectors and officials may ask to see it.

Question 11Arkansas Plumbing Law, Rules, and Licensing Requirements

Which of the following is generally considered plumbing work under Arkansas law?

  1. installing a water heater and its piping Correct answer.
  2. painting a bathroom wall
  3. installing asphalt roof shingles
  4. replacing a light switch

Explanation

Plumbing includes installation and repair of water supply, drain, waste, and vent systems and related fixtures such as water heaters. Roofing, electrical work, and painting are separate trades.

Question 12Arkansas Plumbing Law, Rules, and Licensing Requirements

A plumbing contractor applying for a license in Arkansas is commonly required to show which of the following?

  1. proof of insurance or financial responsibility Correct answer.
  2. ownership of a service truck
  3. membership in a trade union
  4. five years of state residency

Explanation

Plumbing contractors are typically required to demonstrate insurance coverage or financial responsibility as part of licensure. This protects the public if work causes damage or injury.

Question 13Arkansas Plumbing Law, Rules, and Licensing Requirements

When an out-of-state plumber seeks an Arkansas license, the state generally does which of the following?

  1. requires the applicant to meet Arkansas licensing requirements Correct answer.
  2. must issue a license automatically under the Full Faith and Credit Clause
  3. waives all licensing if the plumber has ten years of experience
  4. accepts any local license issued by the plumber's home city

Explanation

Out-of-state plumbers must satisfy Arkansas requirements, whether through examination or a reciprocal agreement between jurisdictions. No constitutional rule forces automatic licensure.

Question 14Arkansas Plumbing Law, Rules, and Licensing Requirements

A plumbing contractor who repeatedly violates the Arkansas Plumbing Code may face which of the following?

  1. loss of the building's water meter
  2. only a verbal warning from a plumbing supplier
  3. suspension or revocation of the license in addition to fines Correct answer.
  4. automatic federal prosecution

Explanation

The state may impose fines and suspend or revoke a license for repeated code violations. These administrative penalties protect public health and safety.

Question 15Arkansas Plumbing Law, Rules, and Licensing Requirements

How may a local government in Arkansas regulate plumbing within its jurisdiction?

  1. by adopting a code that is less strict than the state code
  2. by issuing its own plumber's license that replaces the state license
  3. by enforcing the state plumbing code through local permits and inspections Correct answer.
  4. by banning all plumbing work within the city

Explanation

Local governments typically administer permits and inspections to enforce the adopted plumbing code. They may add stricter requirements but cannot weaken the state's minimum standards.

Question 16Arkansas Plumbing Law, Rules, and Licensing Requirements

A plumbing inspector finds that a contractor installed a water line without the required permit, although the work appears to be correct. What is the inspector's most appropriate action?

  1. require the permit to be obtained and inspect the work Correct answer.
  2. ignore the violation because no damage has occurred
  3. approve the work because it appears to function properly
  4. issue a citation to the property owner only

Explanation

Permit requirements are part of the code and cannot be waived because the work looks acceptable. The inspector should require the contractor to obtain the permit and inspect the installation before approving it.

Question 17Arkansas Plumbing Law, Rules, and Licensing Requirements

A backflow prevention device is installed in a plumbing system to do which of the following?

  1. filter sediment from the water supply
  2. increase the water pressure at fixtures
  3. protect the potable water supply from contamination Correct answer.
  4. heat water more efficiently

Explanation

Backflow preventers stop contaminated water from reversing into the clean water supply. They are required in many cross-connection situations.

Question 18Arkansas Plumbing Law, Rules, and Licensing Requirements

To become a journeyman plumber in Arkansas, an applicant generally must do which of the following?

  1. purchase an established plumbing business
  2. pass a licensing examination and document qualifying experience Correct answer.
  3. hold a real estate license
  4. be at least twenty-five years old

Explanation

Journeyman licensure requires verified experience as an apprentice and a passing score on the licensing examination. Business ownership is not a prerequisite.

Question 19Arkansas Plumbing Law, Rules, and Licensing Requirements

Which action would most likely subject a master plumber's license to disciplinary action?

  1. allowing an unlicensed person to perform plumbing work Correct answer.
  2. renewing the license before the expiration date
  3. keeping copies of permits and inspection records
  4. attending approved continuing education classes

Explanation

A licensee is responsible for ensuring that plumbing work is performed by licensed individuals. Letting an unlicensed person do plumbing work under the license is a violation that can lead to discipline.

Question 20Arkansas Plumbing Law, Rules, and Licensing Requirements

When a local plumbing ordinance and the Arkansas Plumbing Code conflict, which general rule applies?

  1. the contractor may choose whichever rule is easier
  2. the state code sets minimum standards and local rules may be stricter Correct answer.
  3. the local ordinance controls in every case
  4. neither rule applies until a court decides

Explanation

State law establishes minimum plumbing standards, and local governments may adopt stricter requirements but cannot permit work below the state minimum. A conflicting local rule that is less stringent is generally invalid.

Question 21General Regulations, Permits, and Code Administration

Which of the following projects requires a plumbing permit?

  1. Adding a three-fixture bathroom group in a basement Correct answer.
  2. Clearing a stoppage in a kitchen sink drain
  3. Replacing a torn faucet washer on a lavatory
  4. Replacing a toilet tank flapper valve

Explanation

Permits are required for new plumbing work, including adding fixtures or extending the piping system to serve them. Ordinary repairs and stoppage clearing where no pipe or fixture is rearranged are exempt. A new bathroom group involves extending and connecting drain, waste, vent, and water piping, so a permit and inspections are required.

Question 22General Regulations, Permits, and Code Administration

Who is authorized to obtain the plumbing permit for a new commercial building?

  1. The plumbing supply house furnishing the materials
  2. The licensed plumbing contractor performing the work Correct answer.
  3. A journeyman plumber employed by the contractor
  4. A tenant who will occupy the finished space

Explanation

A plumbing permit is issued to the responsible party, which is the licensed plumbing contractor engaged to do the work, or an authorized agent of the owner. The permit carries legal responsibility for the work and for calling the required inspections. Someone who merely works on the job as an employee, occupies the building, or supplies material has no standing to hold the permit.

Question 23General Regulations, Permits, and Code Administration

Rough-in drain, waste, and vent piping inside a new wall may be covered only after which of the following occurs?

  1. The system has been pressure-tested with air only
  2. The owner witnesses a water test on the system
  3. The authority having jurisdiction has inspected and approved it Correct answer.
  4. Insulation has been installed on the hot water lines

Explanation

Piping that will be concealed must remain exposed until the inspector has had the opportunity to examine and approve it. Covering work before approval obligates the permit holder to uncover it at the permit holder's expense. Testing by the installer is part of the job, but testing alone does not replace the required inspection.

Question 24General Regulations, Permits, and Code Administration

The Arkansas Plumbing Code is patterned on which model plumbing code?

  1. The International Residential Code, Part VII
  2. The National Standard Plumbing Code
  3. The Uniform Plumbing Code Correct answer.
  4. The International Plumbing Code

Explanation

Arkansas adopts a plumbing code built on the Uniform Plumbing Code published by IAPMO, which supplies the technical provisions enforced by the state. The International Plumbing Code and the National Standard Plumbing Code are separate model documents used in other jurisdictions. Local amendments may be added, but the base document is the Uniform Plumbing Code.

Question 25General Regulations, Permits, and Code Administration

A journeyman plumber in Arkansas may perform plumbing work under which condition?

  1. Only when covered by a contractor's bond
  2. Under a master plumber's supervision Correct answer.
  3. Only in the county that issued the license
  4. Independently on any single-family residence

Explanation

The journeyman license authorizes hands-on installation work while under the supervision of a licensed master plumber or plumbing contractor. Contracting directly with the public, pulling permits, and working without supervision are functions of the contractor-level license. The license is issued by the state and is not limited to a single county.

Question 26General Regulations, Permits, and Code Administration

A plumbing permit is issued on March 1. Under the permit-duration provisions of a UPC-based code, the permit becomes void if work has not commenced by:

  1. March 1 of the second year after issuance
  2. May 30, which is 90 days after issuance
  3. March 1 of the following year
  4. August 28, which is 180 days after issuance Correct answer.

Explanation

A permit expires by limitation if the authorized work is not started within 180 days of issuance. The same 180-day period applies if work is later suspended or abandoned. Once a permit is void, a new permit must be obtained before the work proceeds.

Question 27General Regulations, Permits, and Code Administration

Which of the following plumbing tasks may be performed without first obtaining a permit?

  1. Extending a water line to a new wet bar sink
  2. Installing a lawn irrigation system with a backflow assembly
  3. Repairing a leaking drain pipe in place, with no piping relocated Correct answer.
  4. Installing a new water heater in a garage

Explanation

The plumbing code exempts the stopping of leaks in drains, soil, waste, or vent pipe, and the clearing of stoppages, provided the repair does not require replacement or rearrangement of valves, pipes, or fixtures. Anything that adds fixtures or extends the system is permitted work. Water heaters, wet bar sinks, and irrigation systems connected to the potable supply all add or alter components.

Question 28General Regulations, Permits, and Code Administration

A contractor wants to install a different piping material than the one shown on the approved plans, although both materials are listed in the code. What is required before the substitution is made?

  1. A signed change order from the building owner
  2. Verbal notice to the inspector before backfill
  3. Written approval from the authority having jurisdiction Correct answer.
  4. Nothing, because both materials are listed in the code

Explanation

Once plans have been reviewed, the approved documents govern the job, and no substitution may be made unless the authority first approves it in writing. The fact that a material is generally permitted by the code does not authorize a change to an approved plan. Approval is obtained in advance so the record and any required inspections match what is installed.

Question 29General Regulations, Permits, and Code Administration

A contractor believes an inspector has misapplied the venting requirements. What is the proper course of action?

  1. Wait for the next code adoption cycle and resubmit the plans
  2. Install the work as planned and correct it if the final inspection fails
  3. Ask the pipe manufacturer to write a letter approving the method
  4. Appeal to the board of appeals; comply unless a stay is granted Correct answer.

Explanation

The code provides a board of appeals to hear challenges to an inspector's interpretation of code provisions. Filing an appeal does not automatically suspend enforcement, so the order stands unless the board grants a stay. Proceeding without resolution exposes the contractor to stop work orders and correction costs.

Question 30General Regulations, Permits, and Code Administration

An inspector posts a stop work order on a plumbing job. What is the effect?

  1. Work may continue in areas of the building not cited in the order
  2. Only the rough-in piping stops; fixtures may still be set
  3. Work may continue if the owner signs a waiver of liability
  4. All work must stop until the order is rescinded by the authority Correct answer.

Explanation

A stop work order halts the work it covers until the authority that issued it rescinds the order, typically after the underlying violation or permit problem is corrected. Continuing to build on rejected work can lead to additional penalties and to removal of the work. The order is not resolved by agreements between the owner and the contractor.

Question 31General Regulations, Permits, and Code Administration

A person who contracts directly with the public to install plumbing systems must hold which of the following?

  1. A written endorsement from the plumbing supply dealer who furnishes the material
  2. A real estate broker's license issued in the county where the business is located
  3. A plumbing contractor's license with the required bond and insurance Correct answer.
  4. Only a journeyman license issued by the state

Explanation

Offering plumbing services to the public requires a plumbing contractor license, which is issued only to a qualified master plumber or through a qualifying master plumber, along with the bond and insurance the state requires. Licensing protects the public by tying the business to a responsible, qualified individual. Employee licenses and supplier endorsements do not authorize contracting.

Question 32General Regulations, Permits, and Code Administration

Construction documents must be submitted to the authority for review before a permit is issued for which of the following?

  1. Repairing a leaking hose bibb on an exterior wall
  2. Clearing a stoppage in a commercial floor drain
  3. A new commercial restaurant's plumbing system Correct answer.
  4. Replacing a kitchen faucet in a single-family house

Explanation

New construction and substantial commercial installations require plans and specifications sufficient to show compliance with the code before a permit is issued. The authority uses the drawings to verify fixture counts, pipe sizing, venting, and backflow protection. Minor repairs and maintenance do not require plan review.

Question 33General Regulations, Permits, and Code Administration

In Arkansas, plumbing permits and inspections for a county that has not established its own plumbing inspection program are administered by:

  1. the county judge's office
  2. the Arkansas Contractors Licensing Board
  3. the Arkansas Department of Health Correct answer.
  4. the local water utility's engineering department

Explanation

The Arkansas Department of Health is the state agency that administers the plumbing code and plumbing licensing, and it provides plumbing plan review and inspection in areas without an approved local program. Local governments that establish their own programs enforce the code within their jurisdiction. Utilities, courts, and the contractors board do not perform plumbing inspections.

Question 34General Regulations, Permits, and Code Administration

A plumber completes a bathroom addition without obtaining a permit. What is the most likely result under the code?

  1. The work is automatically grandfathered because it is already complete
  2. The contractor may self-certify the work in place of an inspection
  3. A stop work order, a required permit, and possible penalties Correct answer.
  4. Nothing, if the work passes a final inspection requested by the owner

Explanation

Work performed without a required permit is subject to a stop work order, assessment of penalties, and a requirement to apply for the permit before any further work. The authority may also require that concealed portions be uncovered so they can be inspected. Completion of the work does not create an exemption.

Question 35General Regulations, Permits, and Code Administration

A plan reviewer stamps a plumbing drawing approved, but the design contains a code violation. Who is responsible for compliance?

  1. The contractor; plan approval does not waive code compliance Correct answer.
  2. Nobody, because an approved stamp guarantees compliance
  3. The plan reviewer, because approval transfers responsibility
  4. The owner, because the owner signed the permit application

Explanation

Review and approval of plans is a check on the design, not a guarantee, and it does not relieve the installer of the duty to comply with the code. The licensed contractor remains responsible for the installation meeting code requirements regardless of what was stamped. This is why an inspector may still reject work shown on an approved plan.

Question 36General Regulations, Permits, and Code Administration

A manufacturer proposes an engineered drainage product that the code does not specifically describe. The authority may approve it when:

  1. Only if the manufacturer provides a ten-year written warranty
  2. Only after the product has been installed elsewhere for one year
  3. The authority finds it equivalent in safety and performance Correct answer.
  4. Only if the building owner accepts all future liability

Explanation

Codes allow the authority to approve alternate materials and methods that are not specifically described, provided the authority finds them equivalent to code-prescribed methods in quality, strength, effectiveness, durability, and safety. Approval is a technical determination, not a contractual matter between the parties. Records of the approval are retained with the permit documents.

Question 37Plumbing Mathematics, Sizing, and Isometric Analysis

A vertical column of water is 23.1 feet tall. What pressure does it exert at its base?

  1. 10 psi Correct answer.
  2. 5 psi
  3. 20 psi
  4. 23.1 psi

Explanation

One psi is equivalent to a 2.31-foot column of water at standard conditions. Dividing 23.1 feet by 2.31 feet per psi gives 10 psi.

Question 38Plumbing Mathematics, Sizing, and Isometric Analysis

A drain line is installed at a slope of 1/4 inch per foot. What is the total fall over an 8-foot run?

  1. 1 inch
  2. 2 inches Correct answer.
  3. 3 inches
  4. 4 inches

Explanation

Total fall equals the slope per foot multiplied by the run in feet. Multiplying 0.25 inch per foot by 8 feet gives 2 inches of fall.

Question 39Plumbing Mathematics, Sizing, and Isometric Analysis

What is the decimal equivalent of 3/8 inch?

  1. 0.312
  2. 0.375 Correct answer.
  3. 0.625
  4. 0.250

Explanation

To convert a fraction to a decimal, divide the numerator by the denominator. Dividing 3 by 8 gives 0.375.

Question 40Plumbing Mathematics, Sizing, and Isometric Analysis

On an isometric riser diagram of a plumbing system, lines drawn vertically represent which of the following?

  1. riser pipes Correct answer.
  2. fixture locations
  3. flow arrows
  4. horizontal branches

Explanation

Isometric projection draws vertical piping as true vertical lines, so stacks and risers appear vertical on the drawing. Horizontal runs are drawn on the two angled axes instead.

Question 41Plumbing Mathematics, Sizing, and Isometric Analysis

What is the cross-sectional area of a pipe with a 6-inch inside diameter?

  1. 113.1 square inches
  2. 37.7 square inches
  3. 18.8 square inches
  4. 28.3 square inches Correct answer.

Explanation

Area equals pi times the radius squared. The radius is 3 inches, and 3.1416 times 9 square inches equals about 28.3 square inches.

Question 42Plumbing Mathematics, Sizing, and Isometric Analysis

One cubic foot of water contains approximately how many gallons?

  1. 7.48 Correct answer.
  2. 62.4
  3. 3.79
  4. 8.33

Explanation

A cubic foot holds 7.48 gallons of water. The related figure of 62.4 pounds is the weight of that same cubic foot, not its volume in gallons.

Question 43Plumbing Mathematics, Sizing, and Isometric Analysis

A cylindrical tank has a 4-foot diameter and a 6-foot height. What is its capacity in gallons?

  1. 1,128 gallons
  2. 564 gallons Correct answer.
  3. 141 gallons
  4. 282 gallons

Explanation

Volume equals pi times radius squared times height, so 3.1416 times 2 squared times 6 equals about 75.4 cubic feet. Multiplying 75.4 cubic feet by 7.48 gallons per cubic foot gives about 564 gallons.

Question 44Plumbing Mathematics, Sizing, and Isometric Analysis

A pipe must offset 14 inches using two 45-degree fittings. What is the diagonal travel between the fittings?

  1. 19.8 inches Correct answer.
  2. 14.0 inches
  3. 9.9 inches
  4. 16.0 inches

Explanation

For a 45-degree offset, the travel equals the offset multiplied by 1.414. Multiplying 14 inches by 1.414 gives about 19.8 inches of travel.

Question 45Plumbing Mathematics, Sizing, and Isometric Analysis

A fixture is located 60 feet above the water main that serves it. What static pressure is lost to elevation?

  1. 14 psi
  2. 140 psi
  3. 26 psi Correct answer.
  4. 60 psi

Explanation

Elevation loss equals the height divided by 2.31 feet per psi. Dividing 60 feet by 2.31 gives approximately 26 psi of static pressure lost.

Question 46Plumbing Mathematics, Sizing, and Isometric Analysis

In a standard isometric drawing, the two horizontal axes are drawn at what angle above the horizontal?

  1. 15 degrees
  2. 60 degrees
  3. 30 degrees Correct answer.
  4. 45 degrees

Explanation

Isometric projection keeps vertical lines vertical and draws the two horizontal axes at 30 degrees above the horizontal, so the three axes sit 120 degrees apart.

Question 47Plumbing Mathematics, Sizing, and Isometric Analysis

A slope of 1/4 inch per foot is approximately what percent grade?

  1. 1.0 percent
  2. 0.25 percent
  3. 2.1 percent Correct answer.
  4. 4.2 percent

Explanation

Percent grade is the fall divided by the run in the same units, times 100. Dividing 0.25 inch by 12 inches and multiplying by 100 gives about 2.1 percent.

Question 48Plumbing Mathematics, Sizing, and Isometric Analysis

One cubic foot per second is equivalent to approximately how many gallons per minute?

  1. 7.48 gpm
  2. 100 gpm
  3. 449 gpm Correct answer.
  4. 60 gpm

Explanation

Each cubic foot holds 7.48 gallons and each minute holds 60 seconds. Multiplying 7.48 by 60 gives about 449 gallons per minute for a flow of one cubic foot per second.

Question 49Plumbing Mathematics, Sizing, and Isometric Analysis

Two pipes carry the same flow at the same velocity. To double the cross-sectional area of a 2-inch pipe, the closest standard pipe size is which of the following?

  1. 4 inch
  2. 6 inch
  3. 3 inch Correct answer.
  4. 2-1/2 inch

Explanation

Cross-sectional area varies with the square of the diameter, so doubling area requires a diameter larger by a factor of the square root of two. That gives 2 times 1.414, or about 2.83 inches, which rounds up to the next standard size of 3 inches.

Question 50Plumbing Mathematics, Sizing, and Isometric Analysis

A soil stack begins at a basement floor at elevation 0'-0" and rises past a first floor at 10'-0", a second floor at 20'-0", and a roof at 30'-0", ending 2 feet above the roof. What is the developed length of the stack?

  1. 12 feet
  2. 32 feet Correct answer.
  3. 34 feet
  4. 30 feet

Explanation

The stack runs from elevation 0 to the roof at 30 feet and then extends 2 feet above it. Adding the two portions gives a developed length of 32 feet.