CALIFORNIA INSULATION CONTRACTOR (C-2) LICENSE EXAM -
PRACTICE QUESTIONS FOR ACTUAL EXAMS AND 100%
CORRECT ANSWERS VERIFIED | FULL EXAM PREP TESTBANK |
INSTANT PDF DOWNLOAD | GUARANTEED PASS
Core Domains:
1. Planning and Estimation
2. Preparation and Site Evaluation
3. Insulation Installation (Thermal and Acoustical)
4. Weatherization and Energy Conservation
5. Safety and Environmental Compliance
6. California Building Standards (Title 24)
This exam preparation resource is designed to provide professional-
grade technical assessment for candidates seeking the California C-2
,Insulation and Acoustical Contractor license. It covers advanced
concepts in building science, thermal resistance, moisture control, and
strict adherence to Cal/OSHA and Title 24 energy efficiency
standards.
SECTION 1: Questions 1–100
1. What is the minimum R-value requirement for attic insulation in
California Climate Zone 12 according to Title 24 standards?
ANS: R-49
2. Which type of insulation is most effective at reducing low-
frequency impact noise in multi-story residential floor
assemblies?
ANS: Resilient channels with sound-dampening mineral
wool batts
3. When calculating the total square footage for a blown-in cellulose
application in an attic, what factor must be added to account for
, settling?
ANS: Approximately 15 to 20 percent depending on
manufacturer specifications
4. A contractor is installing faced fiberglass batts in a crawl space;
which direction should the vapor retarder face?
ANS: Toward the conditioned (heated) side of the structure
5. What is the primary purpose of an attic baffle (vent spacer) when
installing insulation near the eaves?
ANS: To maintain a clear path for airflow from the soffit
vents to the ridge vent
6. Which material has the highest R-value per inch of thickness
among common residential insulation types?
ANS: Closed-cell spray polyurethane foam (SPF)
7. According to Cal/OSHA, at what height is fall protection
mandatory for workers on a construction site unless otherwise
, specified by trade-specific triggers?
ANS: 6 feet
8. What is the chemical blowing agent typically used in modern
environmentally friendly spray foam applications?
ANS: Hydrofluoroolefin (HFO)
9. In a commercial "T-bar" suspended ceiling, what type of
insulation is required if the plenum is used for return air?
ANS: Non-combustible, foil-faced, or encapsulated
formaldehyde-free batts
10. What is the maximum flame spread index allowed for insulation
materials used in Type I and Type II buildings?
ANS: 25
11. A 2,400 square foot attic requires R-38 blown cellulose. If each
bag covers 40 square feet at that R-value, how many bags are
PRACTICE QUESTIONS FOR ACTUAL EXAMS AND 100%
CORRECT ANSWERS VERIFIED | FULL EXAM PREP TESTBANK |
INSTANT PDF DOWNLOAD | GUARANTEED PASS
Core Domains:
1. Planning and Estimation
2. Preparation and Site Evaluation
3. Insulation Installation (Thermal and Acoustical)
4. Weatherization and Energy Conservation
5. Safety and Environmental Compliance
6. California Building Standards (Title 24)
This exam preparation resource is designed to provide professional-
grade technical assessment for candidates seeking the California C-2
,Insulation and Acoustical Contractor license. It covers advanced
concepts in building science, thermal resistance, moisture control, and
strict adherence to Cal/OSHA and Title 24 energy efficiency
standards.
SECTION 1: Questions 1–100
1. What is the minimum R-value requirement for attic insulation in
California Climate Zone 12 according to Title 24 standards?
ANS: R-49
2. Which type of insulation is most effective at reducing low-
frequency impact noise in multi-story residential floor
assemblies?
ANS: Resilient channels with sound-dampening mineral
wool batts
3. When calculating the total square footage for a blown-in cellulose
application in an attic, what factor must be added to account for
, settling?
ANS: Approximately 15 to 20 percent depending on
manufacturer specifications
4. A contractor is installing faced fiberglass batts in a crawl space;
which direction should the vapor retarder face?
ANS: Toward the conditioned (heated) side of the structure
5. What is the primary purpose of an attic baffle (vent spacer) when
installing insulation near the eaves?
ANS: To maintain a clear path for airflow from the soffit
vents to the ridge vent
6. Which material has the highest R-value per inch of thickness
among common residential insulation types?
ANS: Closed-cell spray polyurethane foam (SPF)
7. According to Cal/OSHA, at what height is fall protection
mandatory for workers on a construction site unless otherwise
, specified by trade-specific triggers?
ANS: 6 feet
8. What is the chemical blowing agent typically used in modern
environmentally friendly spray foam applications?
ANS: Hydrofluoroolefin (HFO)
9. In a commercial "T-bar" suspended ceiling, what type of
insulation is required if the plenum is used for return air?
ANS: Non-combustible, foil-faced, or encapsulated
formaldehyde-free batts
10. What is the maximum flame spread index allowed for insulation
materials used in Type I and Type II buildings?
ANS: 25
11. A 2,400 square foot attic requires R-38 blown cellulose. If each
bag covers 40 square feet at that R-value, how many bags are
