Question 1
A demolition contractor needs to estimate the weight of a 30-foot by 40-foot by 6-inch solid reinforced concrete slab (150 lbs/cu ft). What is the total structural weight of the slab in short tons?
Correct Answer:
45.0 short tons
Question 2
A C-21 contractor estimates the removal of 200 cubic yards of solid brick masonry. If the bulking (swell) factor for broken masonry debris is 45%, what is the total loose volume to be hauled?
Correct Answer:
290 cubic yards
Question 3
A site clearance project yields 600 loose cubic yards of mixed demolition debris. If standard 10-wheeler dump trucks carry 12 loose cubic yards per trip, how many total truck loads are required?
Correct Answer:
50 total truck loads
Question 4
A single-story 2,400-square-foot wood-framed residence with stucco exterior has an estimated dead load of 45 pounds per square foot. What is the total structural weight of the building?
Correct Answer:
108,000 pounds (54 tons)
Question 5
A commercial demolition project contains 120 tons of structural steel beams. If scrap metal buyers offer $220 per ton and processing labor costs $45 per ton, what is the net salvage credit?
Correct Answer:
$$21,000 net salvage credit
Question 1
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Prepare with the C-21 Building Moving & Demolition Practice Questions - California CSLB C-21 Building Moving and Demolition Examination Exam practice quiz. This question bank includes 100 questions covering demolition, total, feet, building, and structural. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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C-21 Building Moving & Demolition Practice Questions - California CSLB C-21 Building Moving and Demolition Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on demolition, total, feet, building, and structural. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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