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CSLB exam preparation
C-2 Insulation and Acoustical Contractor Exam Prep
Practice estimating, insulation systems, acoustical applications, and safety.
About this exam
The CXP C-2 practice bank contains 200 questions. Use a free diagnostic to check your starting point across insulation, acoustical work, estimating, and safety topics.
The C-2 guide applies to exams scheduled on or after August 1, 2023, and lists approximate section percentages. CSLB's Examination FAQ lists a 3.5-hour exam duration but no per-trade question count. CXP's 115-question mock is not an official exam length.
- Practice bank size: 200 questions
- Mock exam size: 115 questions
Official CSLB study-guide topics
- Planning and Estimating — Approximate exam percentage: 29%
- Acoustical — Approximate exam percentage: 16%
- Insulation — Approximate exam percentage: 28%
- Safety — Approximate exam percentage: 27%
Exam topics and approximate weights: CSLB study guide.
Sample question
What is the net area of an attic that measures 30' x 60' if 12% is occupied by wood framing?
- 2,016 sq ft
- 1,584 sq ft
- 1,728 sq ft
- 1,650 sq ft
Show answer and explanation
Correct answer: 1,584 sq ft
Explanation: First calculate the gross area: 30 ft × 60 ft = 1,800 sq ft; then calculate the framing area: 1,800 sq ft × 0.12 = 216 sq ft; finally subtract it: 1,800 sq ft − 216 sq ft = 1,584 sq ft. Therefore, 1,584 sq ft is correct; 1,728 sq ft deducts 4% instead of 12%, 1,650 sq ft uses an unsupported deduction, and 2,016 sq ft exceeds the gross area. California Energy Code 2022, CCR Title 24, Part 6, §150.0(m), governs required insulation performance, but it does not alter this net-area calculation.
The CXP prep module
Trade exam preparation for C-2 insulation and acoustical work.
- A practice question bank and timed mock exam for this module.
- A Readiness Score to track progress by topic.
- Questions and explanations available in English and Spanish.
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