PC OSHA Safety Standards 3

Question 1

Under OSHA 29 CFR 1926.403(i), what is the maximum voltage permitted for temporary lighting used on construction sites without special guarding?

Accepted Answer

120V

Answer

Temporary lighting on construction sites must not exceed 120V unless the luminaire is protected from breakage.

Question 2

OSHA defines an 'authorized employee' under the lockout/tagout standard as someone who:

Accepted Answer

Locks out or tags out machines to perform servicing or maintenance

Answer

An authorized employee is the worker who actually applies the lockout/tagout device to control hazardous energy.

Question 3

When using a scaffolding system near energized power lines, OSHA 29 CFR 1926.451 requires scaffolds to be erected at least how far from lines rated 300V to 50kV?

Accepted Answer

10 feet

Answer

Scaffolds must be kept at least 10 feet from power lines rated between 300V and 50kV per OSHA's scaffold standard.

Question 4

An electrician is exposed to a substance listed as an OSHA-regulated carcinogen. Per 29 CFR 1910.1003, what is the minimum retention period for exposure records?

Accepted Answer

30 years

Answer

OSHA requires employee exposure records for regulated carcinogens to be retained for at least 30 years.

Question 5

Under OSHA's ground fault protection requirements for construction (29 CFR 1926.404(b)), which device must be used on all 120V, 15A and 20A temporary receptacle circuits?

Accepted Answer

Ground fault circuit interrupter (GFCI)

Answer

OSHA requires GFCI protection on all 120V, single-phase, 15A and 20A temporary power outlets at construction sites.

(PC) Professional Electrical Contractor Practice Test

(PC) Professional Electrical Contractor Practice Test

PC OSHA Safety Standards 3