TradeExamPro › Cranes & Equipment
85 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 | Rigger Level I |
|---|---|
| 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.
A solid concrete block is 6 ft long, 4 ft wide and 2 ft high. Concrete weighs 150 lb per cubic foot. What does the block weigh?
Answer in lb.
7200 lb
Volume = 6 × 4 × 2 = 48 ft³. Weight = 48 × 150 = 7,200 lb.
Reference: Load weight calculation: volume x unit weight
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
What is a main drawback of lifting a load with one sling in a single vertical hitch?
B. The load is free to rotate and hard to control
A single vertical leg gives no resistance to spinning, and rotation can also unlay a wire rope sling. The sling keeps its full vertical rating in this hitch, so loss of capacity is not the problem; control is.
Reference: Rigging principles: vertical hitch
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