NCCO Core 425 Questions with Complete Solutions
2024/2025
When operating a truck crane what is the most unstable allowable quadrant of operation? a) Front
b) Rear
c) Side
d) Corner - Correct Answer C) Side
What is not a good location for crane setup? a) Top of a hill
b) Hard fill
c) Above utilities
d) Concrete - Correct Answer C) above utilities
When an operator arrives at the jobsite and the crane is already erected, how would the operator check the main and auxiliary hoist brakes?
a) Check pedal for the correct feel
b) Rely on the superintendent to verify the brakes are functioning properly c) Make the lift and see what
happens
d) Lift the load off the ground and apply the brake - Correct Answer d) Lift the load off the ground and
apply the brake What is the difference between an Anti-two-block warning and an Anti-two-block prevention system?
a) Warning device only warns, but prevention system will stop the operation
b) Prevention system only warns, but warning device stops the operation
c) Both are the same
d) Both will warn and stop the dangerous operation - Correct Answer a) Warning device only warns, but
prevention system will stop the operation Who gives the operator hand signals?
a) The foreman
b) The Superintendent 1 / 4
c) The qualified person
d) Anyone who wants to. - Correct Answer C) the qualified person
Why use mats or cribbing?
a) To lift outriggers or crawler off the ground
b) To reduce ground pressure
c) For long boom cranes
d) To stop mud from entering crawlers - Correct Answer B) to reduce ground pressure
Tipping capacities of RT cranes with retracted outriggers are based on what percentage of tipping?
- 70%
- 80%
- 85%
- 75% - Correct Answer D) 75
Should the load be applied when determining the proper boom angle?
a) Yes
b) No
c) Depends on lift conditions
d) Only during critical lifts - Correct Answer A) yes
When should the operator use the run by the seat of the pants technique?
a) Always
b) Never
c) When not making a critical lift
d) Only when making a critical lift - Correct Answer B) never
Load radius is the distance from the center of gravity of the suspended load to the:
a) Center of rotation 2 / 4
b) Center of gravity of the crane
c) Tipping Axis
d) Hook rollers - Correct Answer A) center of rotation
What is the primary reason for using a boom extension?
a) Increase load radius
b) Decrease load radius
c) Increase height
d) Increase reach - Correct Answer C) increase height
What is the minimum design factor required for a right regular lay main, boom or auxiliary hoist rope?
- 5
- 3.5
- 2.5
- 7 - Correct Answer B) 3.5
When telescoping the boom section of an R/T, which section should be telescoped first?
a) First
b) Doesn't matter
c) Largest
d) All sections should be telescoped equally - Correct Answer D) all sections should be telescoped
equally How does the operator determine if correct load chart is being used?
a) Matching serial number
b) Matching Model number
c) Matching Manufacturer's code number
d) Same manufacturer - Correct Answer A) matching serial number 3 / 4
Net capacity is equal to:
a) Gross capacity minus capacity deductions
b) Net load plus gross capacity
c) Capacity deductions minus gross capacity
d) Net load minus gross capacity - Correct Answer A) gross capacity minus capacity deductions
If the SWL of a cranes wire rope is 10,000 lbs using one part, what is the SWL when using 4 parts?
- 10,000 lbs.
- 20,000 lbs.
- 30,000 lbs.
- 40,000 lbs. - Correct Answer D) 40,000 lbs
When first arriving on the jobsite, the operator should first determine the condition of the:
a) Cranes setup location
b) Access roads
c) Parking Lot
d) Headache ball - Correct Answer B) access roads
How does the operator verify the LMI's boom length or load radius reading?
a) Actual measurements
b) No need to verify
c) Calibrate the LMI
d) Check with superintendent - Correct Answer A) actual measurements
If the rated capacity of the crane is above the solid line or within the shaded areas or has an asterisk
next to it, this means the capacity is based on:
- 75% of structural competence
b) Structural competence
- 85% of tipping
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