OSHA 10 Construction Practice Test· OSHA (29 CFR 1926)
What does a ground-fault circuit interrupter (GFCI) do?
Choices
- AIncreases the available current to tools
- BShuts off power quickly when it detects a small current leakCorrect
- CProtects against line-to-line contact
- DConverts AC power to DC power
Answer
Shuts off power quickly when it detects a small current leak
A GFCI shuts off power quickly when it detects a small current leak (about 5 milliamperes). It protects against ground faults but not against line-to-line contact.
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More from this topic
- Q21Which of the following is a main electrical hazard on a construction site?
- Q23On a construction site, the employer must protect workers from ground faults using a GFCI or:
- Q24Lockout/tagout (LOTO) is the practice of:
- Q25For unqualified workers near overhead power lines of 50 kV or below, the minimum clearance to maintain is:
- Q26A GFCI protects workers against ground faults but does NOT protect against:
- Q27Contact with which of the following is a major cause of electrical injuries on construction sites?