TradeExamPro › Cranes & Equipment
37 free practice questions for this exam, each with the reason for the answer and where to look it up.
10 questions, graded as you go, with the reason for every answer. No sign-up.
| Exam | Signalperson |
|---|---|
| Who runs it | NCCCO |
| Where | United States |
Question count, time limit and pass mark differ by where you take it. Check the official candidate bulletin from the organisation that runs your exam.
Under OSHA's Table A, what is the minimum clearance from a power line energised at up to 50 kV?
A. 10 feet
Table A sets 10 feet for lines up to 50 kV, rising in steps for higher voltages. Twenty feet is the distance that triggers the power line precautions when the voltage has not been established, and 15 feet is the Table A value for over 50 kV up to 200 kV.
Reference: 29 CFR 1926.1408, Table A
The signalperson extends an arm horizontally to the side with the fingers closed and the thumb pointing up. What is the signal?
A. Raise the boom
Arm out to the side, thumb up, fingers closed means raise the boom (boom up). Hoist uses a raised forearm with the index finger circling. Extend the boom is a two-hand signal given at waist level.
Reference: 29 CFR 1926 Subpart CC, Appendix A (Standard Hand Signals)
Under OSHA's Table A, what is the minimum clearance from a power line energised at 230 kV?
D. 20 feet
A 230-kV line falls in the 'over 200 to 350 kV' band, which requires 20 feet. Fifteen feet applies only up to 200 kV, and 25 feet applies above 350 kV up to 500 kV.
Reference: 29 CFR 1926.1408, Table A
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