CSLB HVAC (C-20): Study Guide and Online Practice Exam + Law and Business Study Guide and Online Practice Exam
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What’s included
- Learn the material: HVAC (C-20) Study Guide Book
- Pass the test: HVAC (C-20) Practice Exam
- Required for all California contractor applicants: Law & Business Study Guide Book and Law & Business Practice Exam
What this covers
Per the state's classification, a C-20 contractor installs, services, and repairs forced-air heating, ventilating, and air conditioning systems, including ductwork, equipment, and refrigeration components. This printed book covers the subjects the state tests. See the official CSLB C-20 classification.
Sample questions — Try our free practice test
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In 1 ton of air conditioning there are how many Btu's per hour?
A. 10,000 · B. 11,000 · ✓ C. 12,000 · D. 15,000 -
Two methods of evacuation are:
A. Deep and purging · B. Deep and vapor · ✓ C. Deep and triple · D. Deep and surface -
The mechanism that comprises both a service valve and a pressure gauge is a:
A. Selenium · B. Charging pulse · ✓ C. Testing manifold · D. Transformer -
A three pipe water system has which of the following?
A. 1 return, 1 supply and 1 reserve · B. 1 supply, 2 returns · ✓ C. 2 supplies, 1 return · D. 2 returns, 2 supplies -
A compressor in which compression is attained in a cylinder by rotation of a semiradial member is known as which of the following?
A. Compressor · ✓ B. Rotary compressor · C. Hermetic compressor · D. Open type compressor -
Which of the following describes series heating cooling circuits?
A. Single circuits · ✓ B. Combination circuits · C. 3 way circuits · D. 4 way circuits -
[Law & Business] A construction contract was written containing the following time estimates to complete the job. It would take 2 days to ready the construction site and then the job itself would be done in 2 phases. The first phase would take 10 days and the second would take 7 days, but these 2 phases could be at the same time. It would take one additional day at the end to clean up. How many days would it take to complete this project?
A. 15 days · ✓ B. 13 days · C. 11 days · D. 7 days -
[Law & Business] A contractor receives a notice from the Employment Development Department (EDD) that one of his former employees has filed a claim for Unemployment Insurance (UI) benefits against his reserve account. He/she may:
A. call EDD within 5 days and protest · ✓ B. protest, in writing, within 10 days of the mailing date of the notice · C. protest, in writing, within 30 days of the mailing date · D. protest, in writing, within 45 days of the mailing date
California contractors who passed
The Law and Business part scared me more than the HVAC part. I took the practice exams over and over until the score stopped going up and down. Passed both.
I took the Law and Business first because everyone said it was harder. For the HVAC side, the airflow diagrams were what finally taught me the material.
The timer was my biggest problem. Practicing with the clock running taught me not to stay too long on one question.