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Finish Wiring & Trim — California C-10 Practice Questions

26 questions · 11% of the C-10 Electrical Trade exam

Worked questions

1. A grounding-type receptacle is replacing a device on an ungrounded circuit and no grounding path is available. Which approach may be permitted when correctly implemented?

  • AInstall a three-prong receptacle with no protection or label
  • Use a permitted labeled GFCI replacement method
  • CBond the grounding terminal to neutral at the receptacle
  • DConnect the grounding terminal to a water faucet

Why B is correct

The applicable GFCI replacement method can improve shock protection but does not create an equipment-grounding conductor and requires labeling. Neutral-ground bonding at the receptacle is improper.

3. A decorative luminaire weighs more than the outlet box's marked support rating. What finish-work change is required?

  • ASuspend it from branch-circuit conductors for the described C-10 installation and documented operating conditions
  • Provide a box or independent support system listed for the actual weight
  • CUse longer cover-plate screws
  • DRemove the equipment ground to make room

Why B is correct

The best answer is: Provide a box or independent support system listed for the actual weight. The luminaire load must be carried by an appropriately rated box or support. Conductors and ordinary device screws are not structural supports, and removing grounding creates a shock hazard. This transferred field condition tests the same installation or safety principle in a different project context. The other choices conflict with the cited rule, listing, safe-work process, or necessary diagnostic sequence.

4. At turnover, a panel schedule contains entries such as “spare?” and “miscellaneous.” What should replace them?

  • ANo directory if the panel is locked
  • A clear durable directory identifying the actual purpose or area served
  • CBreaker numbers with no load description for the described C-10 installation and documented operating conditions
  • DThe occupant’s name only

Why B is correct

The best answer is: A clear durable directory identifying the actual purpose or area served. Accurate circuit identification supports safe isolation and maintenance. Generic terms, occupant names, or a locked door do not tell a worker which loads a breaker controls. This transferred field condition tests the same installation or safety principle in a different project context. The other choices conflict with the cited rule, listing, safe-work process, or necessary diagnostic sequence.

22 more in the bank

Answers and explanations for these are in the app.

  • A GFCI receptacle has line and load conductors reversed and will not provide intended downstream protection. What is required?
  • A heavy luminaire exceeds the support rating of the installed outlet box. What is required?
  • A luminaire not identified for wet use is installed where directly exposed to rain. What should occur?
  • A motor disconnect is unlabeled among identical switches. What is required?
  • A panel contains circuits from normal and standby sources. What identification is needed?
  • A panel has specified lug torque but no record of final tightening. What should be done?
  • A receptacle tester indicates reversed polarity. What should the electrician do?
  • A stranded conductor is placed under a terminal identified only for solid conductors. What is the correct finish-work response?
  • An outdoor receptacle loses weather protection whenever a cord is plugged in. What should replace its cover where required?
  • Panel instructions specify terminal torque values. How should final connections be completed?
  • Several panel directory entries read only “misc.” What is required at turnover?
  • A cord-connected outdoor load defeats weather protection when its receptacle is in use. Which cover is required where applicable?
  • A dry-location luminaire is mounted under an open canopy where wind-driven rain reaches it. Which equipment change is necessary?
  • A GFCI receptacle's supply conductors were landed on LOAD and protected downstream outlets do not function as intended. What is required?
  • An old two-wire branch circuit has no equipment grounding path. Which replacement receptacle method may be used when all required marking is provided?
  • Circuit changes leave open breaker positions and conduit openings in a panel enclosure. How must they be closed?
  • Final inspection finds no evidence that panel lugs received their specified torque. What should the contractor do?
  • Fine-stranded flexible conductor is proposed under a lug listed only for a different conductor class. What should the electrician do?
  • Manufacturer data lists a specific torque for breaker lugs. How should the electrician make and verify those terminations?
  • Normal and standby circuits share an enclosure, but their sources cannot be identified at a glance. Which marking correction is needed?
  • Testing finds the grounded and ungrounded conductors reversed at a receptacle. What is the proper repair sequence?
  • Three identical switches include a motor disconnect with no identifying mark. What must the finish electrician add?

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