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Electrical struckby caughtin practice questions

30 questions from the osha construction safety practice test.

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Electrical struckby caughtin practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

For 120-volt, 15- and 20-ampere temporary receptacles on a construction site, which choice does OSHA give the employer for ground-fault protection?

  1. GFCIs or an assured equipment grounding conductor program
  2. GFCIs or double-pole circuit breakers in the temporary panel
  3. An assured grounding program or weatherproof cord caps
  4. Double-insulated cords or a daily megohmmeter test
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A. GFCIs or an assured equipment grounding conductor program

The employer must use either GFCIs or an assured equipment grounding conductor program on temporary 120-volt, single-phase, 15- and 20-ampere receptacles. Circuit breakers protect wiring from overcurrent and do not provide ground-fault protection for people.

Reference: 29 CFR 1926.404(b)(1)(i)

Which electric power tool is not required to have a grounding conductor in its cord?

  1. A tool that has a metal case and a 15-ampere motor
  2. A tool that is approved as double-insulated
  3. A tool that is used only on a wooden scaffold
  4. A tool that is used with a cord under 25 feet long
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B. A tool that is approved as double-insulated

Electric power tools must be either grounded with a three-wire cord or of the approved double-insulated type. Cord length and the surface the worker stands on do not change that requirement.

Reference: 29 CFR 1926.302(a)(1)

A crane is set up near an energized overhead line of 13.8 kV. What is the minimum clearance the crane, load line and load must keep from the line?

  1. 4 feet
  2. 6 feet
  3. 10 feet
  4. 15 feet
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C. 10 feet

For lines up to 50 kV the minimum approach distance is 10 feet. Fifteen feet applies to lines over 50 kV and up to 200 kV.

Reference: 29 CFR 1926.1408, Table A

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