Mobile Crane NCCER Study Guide
Questions And Answers |Latest 2025 |
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When determining the "gross load" the best method is: - Answer✔Get an accurate load weight
and add the rigging
By order of strength which is correct - Answer✔Basket, Vertical, Choker
Primary purpose for a roster sheave or auxiliary boom point sheave is to: - Answer✔Separate
the hoist line
When the number of layers of rope on a drum increase the : - Answer✔Allowable line pull
decreases
What is the minimum allowable distance from the crane and power lines under 50kV? -
Answer✔10'
Eccentric main boom tip reeving casues - Answer✔twisting of the boom
How many randomly broken wires must there be to remove a running wire rope from service? -
Answer✔6
When working near power lines when is a signal person required? - Answer✔When crane
moves within a booms length of power lines
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When operating truck cranes what is the most unstable allowable quadrant of operation? -
Answer✔Side
Tipping capacities of locomotive cranes are based on what % of tipping? - Answer✔85%
Should the load be applied when determining the proper boom angle? - Answer✔YES
What type of rope is recommended for a tagline around powerlines - Answer✔Polypropylene
what does two beeps of the horn indicate to people in the area - Answer✔forward
Load radius is the distance from the center of gravity of the suspended load to the: -
Answer✔Center of rotation
What is the purpose of using a boom extension? - Answer✔Increase height
What do a jib and boom ext. have in common - Answer✔Increase height
What is the minimum design factor required for a right regular lay main boom or auxiliary hoist
rope?` - Answer✔3.5
How does the operator determine if the correct load chart is being used? - Answer✔Matching
serial numbers
If the crane's jib is offset 5 degrees as opposed to an original 15 degrees and the boom angle
remains constant you would expect the load radius to do what? - Answer✔To be reduced
How does the operator verify the LMs boom length or load radius reading? - Answer✔accutal
measurements
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