Building, Moving, and Demolition (C-21) Study Guide and Online Practice Exam

What’s included

• Learn the material: Building, Moving & Demolition (C-21) Study Guide Book
• Pass the test: Building, Moving & Demolition (C-21) Practice Exam

What this covers

Per the state's classification, a C-21 contractor "raises, lowers, cribs, underpins, demolishes and moves or removes structures, including their foundations." This printed book covers the subjects the state tests. See the official CSLB C-21 classification.

Sample questions

1. What kind of fire extinguisher should be used on an asphalt roof fire?
   A. Foam · B. Soda acid · C. Carbon dioxide · ✓ D. Dry chemical
2. Which of the following fire extinguishers cannot be used to put out a Class B fire?
   A. Foam · B. Ordinary dry chemical · ✓ C. Gas cartridge · D. Carbon dioxide
3. Which type of extinguisher contains a solution of aluminum sulfate and bicarbonate of soda?
   ✓ A. Foam · B. Ordinary dry chemical · C. Gas cartridge · D. Carbon dioxide
4. 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
5. Pedestrian protection must be in place prior to demolishing a building. What protection is required, if the height of construction being removed is more than 8' high?
   A. a distance of more than half of 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
6. 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