10 exam-style questions with answers and explanations. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The ABC exam has 65 questions and runs 1 hour 30 minutes.
These 10 free ABC questions are organized by exam domain, so you can see how each part of the Articulating Boom Crane (ABC) blueprint is tested. Reveal the answer and explanation under each question.
A crane will operate near an overhead power line energized at 13,800 volts (13.8 kV). Using OSHA's Table A minimum approach distances, what is the minimum clearance that must be maintained between any part of the crane, load line, or load and the line?
Correct answer: B - 10 feet
The main reason for placing blocking or cribbing under an articulating crane's stabilizer floats is to:
Correct answer: A - reduce the ground bearing pressure under the crane
The load radius of an articulating boom crane is correctly defined as the horizontal distance from the:
Correct answer: A - center of rotation to the load's vertical centerline
An operator raises a load off the ground abruptly, briefly placing a force on the crane that is greater than the load's actual static weight. This is best described as:
Correct answer: C - dynamic (shock) loading
A load being lifted is snagged and will not come straight up. What should the operator do?
Correct answer: D - Stop and free the load so it lifts straight up
When using U-bolt wire rope clips to form an eye in a wire rope, the clips must be installed so that:
Correct answer: D - the saddle is seated on the live (load-bearing) part of the rope
Under ASME B30.22, an articulating boom crane used as a lifting crane is generally outside the scope of the standard when its maximum rated capacity is no greater than:
Correct answer: B - 2,000 lb
During a pre-use inspection, a crane hook is found to have a throat opening that is measurably wider than its original dimension. This most likely means the hook:
Correct answer: D - has been overloaded and must be removed from service
A load chart shows a gross rated capacity of 6,000 lb at the planned radius and configuration. The hook and headache ball weigh 200 lb, the slings and shackles weigh 300 lb, and a stowed jib adds 500 lb. What is the maximum weight of the load itself that may be hoisted?
Correct answer: C - 5,000 lb
An operator sets the crane up on mid (partially extended) stabilizers but reads the capacity column for fully extended stabilizers. What is the most likely consequence?
Correct answer: C - Available capacity is lower than shown, creating an overload risk
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