NCCCO / COO Core Written Exam (Latest Update 2025 / 2026) Practice Questions and Answers | Grade A | 100% Correct
Question:
What is the difference between an anti-two-block warning device and an anti- two-prevention system?
Answer:
Warning device only warns, but prevention system will stop the operation.
Question:
When an operator arrives at the jobsite and the crane is already erected, how would the operator check the main and auxiliary hoist brakes?
Answer:
Lift the load off the ground and apply the brake
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Question:
When should a tagline be used?
Answer:
When rotation of load would be dangerous
Question:
What is not a good location for crane setup?
Answer:
Above utilities
Question:
Who gives the operator hand signals?
Answer:
The person assigned prior to the lift
Question:
Why use mats or cribbing?
Answer:
To reduce ground pressure
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Question:
Tipping capacities of crawler cranes are based on what percentage of tipping?
Answer:
75%
Question:
Should the load be applied when determining the proper boom angle?
Answer:
Yes
Question:
When should the operator use the Arun by the seat of the pants technique?
Answer:
NEVER
Question:
Load radius is the distance from the center of gravity of the suspended load to
the:
Answer:
Center of rotation 3 / 4
Question:
Why is the primary reason for using a boom extension?
Answer:
Increase height
Question:
What is the minimum design factor required for a right regular lay main, boom, auxiliary hoist rope?
Answer:
3.5
Question:
When telescoping the boom section of an R/T, which section should be telescoped first?
Answer:
All sections should be telescoped equally
Question:
How does the operator determine if correct load chart is being used?
Answer:
Matching serial number
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