OSHA construction electrical safety practice questions

1. Where must the written description of an assured equipment grounding conductor program be available?

• A. Nowhere; the program does not need to be written
• B. At the employer's head office only
• C. On file with the local building department
• D. At the jobsite, for inspection and copying by the Assistant Secretary and any affected employee

2. Receptacles on a two-wire, single-phase portable or vehicle-mounted generator need no GFCI if the generator's circuit conductors are insulated from its frame and all other grounded surfaces and the generator is rated at no more than how much?

• A. 10kW
• B. 5kW
• C. 25kW
• D. 50kW

3. Under an assured equipment grounding conductor program, by what means may the required test record be kept?

• A. Only in a notarized paper ledger
• B. Only by a stamp on each tool
• C. By means of logs, color coding, or other effective means
• D. No record is required

4. Under an assured equipment grounding conductor program, a cord set has not met the program's requirements. What does the rule say about it?

• A. It may be used for one more day
• B. It may be used outdoors only
• C. It may be used once its plug is taped
• D. The employer shall not make it available or permit its use by employees

5. Under an assured equipment grounding conductor program, which test must be done on all equipment grounding conductors?

• A. A test for continuity; they shall be electrically continuous
• B. A 1,000-volt insulation resistance test
• C. A voltage drop test under full load
• D. An arc flash test

6. Under an assured equipment grounding conductor program, what is the longest interval the rule allows between tests of cord sets and receptacles that are fixed and not exposed to damage?

• A. 12 months
• B. 10 years
• C. 5 years
• D. 6 months

7. To protect employees on construction sites against ground faults, which choice does 1926.404(b)(1) give the employer?

• A. Ground-fault circuit interrupters as specified, or an assured equipment grounding conductor program
• B. Placing rubber mats at each work station
• C. Using double-insulated tools in place of any other protection
• D. Any grounding method the electrician prefers

8. A crew needs portable lights inside a steel tank, a conductive location, and wants to use 120-volt lights. Under what condition does Subpart K allow it?

• A. If the lights are protected by a ground-fault circuit interrupter
• B. If the lights are suspended by their cords
• C. If a worker stands watch outside the tank
• D. If the tank is dry at the time

9. When may temporary lights be suspended by their electric cords?

• A. Whenever the lights are used indoors
• B. Whenever the light weighs less than 5 pounds
• C. Whenever the cord is wrapped in tape
• D. Only when the cords and lights are designed for this means of suspension

10. When must temporary wiring be removed?

• A. Within one year of installation
• B. Only when the building owner asks
• C. Immediately upon completion of construction or the purpose for which it was installed
• D. At the end of each work week

11. In temporary wiring, where does the rule forbid branch-circuit conductors to be laid?

• A. In raceways
• B. Inside multiconductor cable assemblies
• C. On the floor
• D. On insulators

12. When may flexible cords and cables pass through doorways or other pinch points?

• A. Never, under any condition
• B. If protection is provided to avoid damage
• C. Only if the cord is designed for extra-hard usage
• D. Only when the cord is unplugged

13. How must flexible cords be connected to devices and fittings?

• A. So that strain relief prevents pull from being directly transmitted to joints or terminal screws
• B. With the outer jacket stripped back past the clamp
• C. With the conductors twisted together without a fitting
• D. Loosely, so the cord pulls free under strain

14. Which of these does 1926.405 list as a prohibited use of flexible cords and cables (unless needed for a permitted use)?

• A. Pendants
• B. As a substitute for the fixed wiring of a structure
• C. Wiring of cranes and hoists
• D. Connection of portable lamps or appliances

15. How must the entrances to rooms and other guarded locations containing exposed live parts be marked?

• A. With the name of the electrician on duty
• B. With yellow floor tape only
• C. With conspicuous warning signs forbidding unqualified persons to enter
• D. They need no marking if the door is kept closed

16. A contractor wants to stack boxes of fittings in the required working space in front of a panelboard. What does Subpart K say?

• A. Working space required by the subpart shall not be used for storage
• B. Storage is allowed if the panel is deenergized at night
• C. Storage is allowed if a warning sign is posted
• D. Storage is allowed if the boxes are less than 30 inches high

17. Where the exact location of underground electric powerlines is unknown, what must employees using jack-hammers, bars or other hand tools that may contact a line be provided with?

• A. High-visibility vests
• B. Hearing protection
• C. Insulated protective gloves
• D. Steel-toe boots

18. Before work begins, how must the employer find out whether an energized electric power circuit, exposed or concealed, is located where the work could bring a person, tool or machine into contact with it?

• A. Only after work has begun, by checking any lines that are uncovered
• B. By inquiry or direct observation, or by instruments
• C. By assuming that any concealed circuit is deenergized
• D. By having the building inspector sign off after the work is finished

19. Under 1926.417, what must the tags used on circuits and equipment identify?

• A. The date of the last OSHA inspection
• B. The employer's mailing address
• C. The brand of the circuit breaker
• D. Plainly, the equipment or circuits being worked on

20. As Subpart K applies the term to live parts, what does "exposed" mean?

• A. Visible from a distance
• B. Capable of being inadvertently touched or approached nearer than a safe distance by a person
• C. Located outdoors
• D. Operating at more than 600 volts