Electrical (C-10) Study Guide Book + Online Practice Exam

What’s included

• Learn the material: Electrical (C-10) Study Guide Book
• Pass the test: Electrical (C-10) Practice Exam

What this covers

Per the state's classification, a C-10 contractor "installs, erects, constructs, repairs, services, alters, adds to, or designs... electrical wiring, services, equipment, and apparatus for light, heat, and power." This printed book covers the subjects the state tests. See the official CSLB C-10 classification.

Sample questions

1. At what depth should U.F. cable be buried in the earth, given it has no supplemental protection?
   A. 12" · B. 18" · ✓ C. 24" · D. 36"
2. The larger the conductor, the:
   A. Lower the ampacity · ✓ B. Lower the resistance · C. Higher the resistance · D. Higher the voltage
3. Type UF cable shall not be used in:
   A. Hoistways · B. Motion picture studios · C. Storage battery rooms · ✓ D. All of the above
4. A shunt is used in parallel with a d. c. ammeter measuring large currents to:
   A. dampen the meter pointer · ✓ B. reduce the meter current · C. protect the meter against shorts · D. increase the sensitivity of the meter
5. The minimum clearance from ground to service conductors over a public street is:
   A. 12' · B. 15' · ✓ C. 18' · D. 21'
6. When you check a 3 phase motor winding for polarity with a compass, the pointer should indicate:
   ✓ A. the same number of alternate north and south poles · B. the same number of alternate poles as there are phases · C. a north pointer deflection in the direction of rotation · D. a south pointer deflection in the direction of rotation