CSLB Building, Moving and Demolition (C-21) License: Practice Examination

What this exam covers

Practice questions for the California CSLB Building Moving / Demolition (C-21) license exam, delivered online and graded instantly. Per the state's classification, a C-21 contractor raises, lowers, cribs, underpins, demolishes and moves or removes structures, including their foundations. Works on any device, including iPad. See the official CSLB C21 classification.

4 exams · over 400 questions

Sample questions

1. For explosive blast, which can't be used as the source of current?
   A. a blasting machine · B. light circuit · C. power circuit · ✓ D. storage batteries
2. Pedestrian protection must be in place prior to demolishing a building. What protection is required, if the height of construction being required, if the height of construction being removed is more than 8' high?
   A. a distance of more than half o the construction fence height · B. a distance of less than 6' canopy and fence · ✓ C. a distance of not more than a quarter the height of the construction fence · D. a safe walkway around the structure of 4 feet in width
3. All glazed openings shall be removed a minimum of ___ the working level, when a hazard occurs from glass fragmentation.
   ✓ A. 1 floor below · B. 1 floor above · C. a floor equal to · D. none of the above
4. Where should the demolition of exterior walls and floor construction begin with the exception of holes used to drop materials, holes cut in floors for chutes or preparing storage space?
   A. the bottom of the structure going outward · B. the bottom of the structure going upward · ✓ C. the top of the structure going downward · D. none of the above
5. During work, a way of preventing dust from rising is by using:
   A. blowers · ✓ B. water · C. a vacuum · D. the use of filters