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100+ Free AL Insulation Practice Questions

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2026 Statistics

Key Facts: AL Insulation Exam

70%

Passing Score

PSI AL GC Bulletin

50 Q

Official Exam Questions

PSI AL GC Bulletin

2 hours

Time Allowed

PSI AL GC Bulletin

$96

PSI Exam Fee

PSI AL GC Bulletin

Open book

Exam Format

PSI AL GC Bulletin

Alabama AL Insulation trade exam via PSI: 50 questions, 70% pass, 2 hours, fee $96. Open-book specialty classification under the Alabama Licensing Board for General Contractors (bulletin 1/23/26).

Sample AL Insulation Practice Questions

Try these sample questions to test your AL Insulation exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What does the R-value of an insulation product measure?
A.Thermal resistance to conductive heat flow
B.The product's flame-spread rating
C.Moisture absorption as a percentage of weight
D.Air leakage rate through the material
Explanation: R-value quantifies a material's thermal resistance—how well it resists conductive heat transfer. Higher R-value means better insulating performance for a given thickness under standard lab conditions. Flame spread, moisture absorption, and air leakage are separate performance properties.
2How is U-factor related to R-value for a simple homogeneous assembly?
A.U-factor equals R-value squared
B.U-factor equals 1 divided by R-value
C.U-factor equals R-value times thickness
D.U-factor and R-value are identical measurements
Explanation: U-factor is the overall coefficient of heat transfer. For a simple assembly, U = 1/R. A higher R-value means a lower U-factor and less heat flow. Codes often specify minimum R-values for insulation layers and maximum U-factors for fenestration and assemblies.
3Heat transfer through a solid wall assembly by molecular vibration is called:
A.Convection
B.Radiation
C.Conduction
D.Infiltration
Explanation: Conduction is heat flow through solid materials by molecular contact and vibration. Insulation works primarily by slowing conductive heat transfer through trapped air or low-conductivity foam cells. Convection is fluid-driven; radiation is electromagnetic; infiltration is bulk air leakage.
4Which heat-transfer mode is reduced most effectively by a radiant barrier facing an air space?
A.Conduction through framing
B.Radiation across the air space
C.Capillary water movement
D.Ground-source conduction
Explanation: Radiant barriers (typically low-emissivity foil) reflect infrared radiation and/or emit very little of it. They only work when facing an open air space. They do not significantly stop conduction through framing or liquid water movement.
5Compressing a fiberglass batt into a cavity shallower than its labeled thickness primarily causes which performance loss?
A.Increased fire resistance
B.Reduced effective R-value because thickness is reduced
C.Automatic conversion to an air barrier
D.Elimination of the need for vapor control
Explanation: Batt R-value depends heavily on installed thickness and full-cavity fill. Compressing a thicker batt into a shallower cavity reduces thickness and can lower installed R-value below the labeled rating. Compression does not create air-barrier performance or remove vapor-control needs.
6Thermal bridging in a wood-framed wall is best described as:
A.Heat flow through higher-conductivity framing that bypasses cavity insulation
B.Air leakage only at electrical outlets
C.Solar gain through south-facing glass
D.Condensation forming only on metal ductwork
Explanation: Thermal bridges are paths of higher conductivity—studs, plates, headers—that conduct heat around cavity insulation. Continuous exterior rigid insulation is one common strategy to reduce framing thermal bridging. Air leakage and solar gain are separate envelope issues.
7Which statement about labeled insulation R-value is correct under the FTC R-value Rule concept?
A.Installers may advertise any R-value without documentation
B.Manufacturers must label products with tested R-value information for consumer claims
C.R-value labels are optional if the product is sold to contractors only
D.R-value only applies to rigid foam products
Explanation: The Federal Trade Commission R-value Rule (16 CFR Part 460) requires insulation sellers to base R-value claims on standardized tests and provide required label and fact-sheet information. R-value labeling applies across common insulation types, not only foam.
8In building science terms, an air barrier primarily controls:
A.Bulk liquid water from wind-driven rain only
B.Unintended air movement into and out of the enclosure
C.Water vapor diffusion only
D.Structural racking loads
Explanation: An air barrier controls bulk air leakage driven by pressure differences. Air leakage carries both energy and moisture. Vapor retarders control diffusion; water-resistive barriers manage liquid water; structure carries loads.
9Which material property most directly indicates resistance to water-vapor diffusion?
A.Density in pounds per cubic foot
B.Permeance in perms
C.Flame-spread index
D.Compressive strength in psi
Explanation: Water vapor permeance, expressed in perms (grains per hour per square foot per inch of mercury), describes how readily vapor diffuses through a material. Lower perm ratings mean greater resistance to diffusion. Density, flame spread, and compressive strength measure different properties.
10Alabama is generally in a mixed-humid climate. For wall assemblies, this typically means vapor control design should:
A.Ignore moisture because humidity is always low
B.Account for both winter inward-to-outward and summer outdoor-to-indoor vapor drives
C.Always use two Class I vapor barriers, one on each side of the wall
D.Prohibit any vapor-open exterior sheathing
Explanation: Mixed-humid climates experience seasonal vapor drive in both directions. Assemblies need drying potential and carefully chosen vapor control—double Class I barriers can trap moisture. Design must balance winter and summer conditions rather than assuming one-way drive.

About the AL Insulation Exam

The Alabama Insulation Contractor Examination is a classification trade examination administered by PSI for the Alabama Licensing Board for General Contractors. The official open-book exam has 50 questions, a 70% (35 of 50 correct) passing standard, and 120 minutes allowed. PSI examination fee is $96 per attempt (bulletin updated 1/23/26). This English-language MCQ bank is a study aid for the trade knowledge on the official content outline; it is not an official PSI form, does not replace the required Business & Law exam for primes, and is not a substitute for board-approved experience or the official open-book examination.

Questions

50 scored questions

Time Limit

120 minutes

Passing Score

70%

Exam Fee

$96 (PSI Services LLC (for Alabama Licensing Board for General Contractors))

AL Insulation Exam Content Outline

16%

General Knowledge and Theory

Insulation theory and R-values

16%

Safety and Employee Protection

Insulation jobsite safety

12%

Other Insulation Applications

Specialty insulation applications

10%

Plan Reading, Materials, Estimating, and Take-Offs

Plans and takeoffs

10%

Ventilation

Ventilation with insulation systems

8%

Spray-On Application

Spray-applied insulation

8%

Batt/Roll Insulation

Batt and roll systems

8%

Blown or Loose-Fill Insulation

Blown-in and dense-pack

8%

Vapor Barrier and Retarders

Vapor barriers and retarders

4%

Rigid-Board and Reflective Insulation

Rigid and reflective systems

How to Pass the AL Insulation Exam

What You Need to Know

  • Passing score: 70%
  • Exam length: 50 questions
  • Time limit: 120 minutes
  • Exam fee: $96

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

AL Insulation Study Tips from Top Performers

1Study only the approved references listed for your classification in the current PSI Alabama General Contractors bulletin
2Practice open-book navigation with permanent tabs and indexes before test day
3Drill OSHA 29 CFR 1926 topics that appear across nearly every trade outline
4Work quantity takeoff and plan-reading problems under timed conditions
5Confirm Board eligibility and classification scope on genconbd.alabama.gov before scheduling with PSI

Frequently Asked Questions

How many questions are on the AL Insulation exam?

The official PSI trade examination has 50 scored questions (plus possible experimental items). Passing is 70% (35 of 50 correct) within 120 minutes.

How much does the AL Insulation exam cost?

PSI lists $96 per examination registration for this Alabama general contractor classification exam (Candidate Information Bulletin updated 1/23/26). License application fees to the Board are separate.

Is the Alabama specialty contractor exam open book?

Yes. PSI administers these classification exams as open book. Only the bulletin-listed approved references are allowed; temporary tabs like Post-it notes are prohibited.

Do I still need the Business and Law exam?

Prime contractor applicants must also pass the Alabama Business & Law examination (50 questions, 70%, 120 minutes). Reciprocity may waive a trade exam in some cases but does not waive Business & Law.