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CSLB exam preparation
Class A General Engineering Contractor Exam Prep
Practice estimating, structural principles, earthwork, piping, foundations, structures, roadwork, and safety.
About this exam
The CXP Class A bank includes 204 practice questions covering general engineering work. Start with a free diagnostic and use your results to focus your next study session.
The General Engineering guide applies to exams scheduled on or after February 1, 2025, 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: 204 questions
- Mock exam size: 115 questions
Official CSLB study-guide topics
- Planning and Estimating — Approximate exam percentage: 15%
- Structural Principles — Approximate exam percentage: 6%
- Earthwork and Surveying — Approximate exam percentage: 15%
- Subsurface, Surface, and Elevated Piping Work — Approximate exam percentage: 21%
- Foundation and Concrete Construction — Approximate exam percentage: 11%
- Buildings, Structures, and Related Work — Approximate exam percentage: 9%
- Roadwork and Paving — Approximate exam percentage: 5%
- Safety — Approximate exam percentage: 18%
Exam topics and approximate weights: CSLB study guide.
Sample question
An engineering project requires excavating a straight drainage channel 300 feet long, 6 feet wide at the base, with a uniform depth of 4 feet and vertical side walls. How many bank cubic yards (BCY) of earth must be excavated?
- 267 BCY
- 400 BCY
- 7,200 BCY
- 200 BCY
Show answer and explanation
Correct answer: 267 BCY
Explanation: The channel cross-sectional area is 6 ft × 4 ft = 24 ft². Its bank volume is 300 ft × 24 ft² = 7,200 ft³, and conversion to cubic yards gives 7,200 ft³ ÷ 27 ft³/yd³ = 266.666... yd³, which rounds to 267 BCY. The 267 BCY option is correct because the vertical sides and constant dimensions form a rectangular prism. The 200 BCY and 400 BCY choices do not follow from the stated dimensions, while 7,200 BCY confuses cubic feet with cubic yards. Excavation protection is governed by California Code of Regulations, Title 8, §1541.1 and OSHA 29 CFR §1926.652; those safety rules do not change the geometric conversion.
The CXP prep module
Trade exam preparation for Class A general engineering 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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