Mobile Crane Operator Core Review Questions | Actual
Exam Questions & 100% Correct Answers | Latest Update
2026 | Certification Exam Prep
1. When the ground is not firm enough to support the crane tires and load you
should?
Do not extend the stabilizer beams fully
Do not use the outriggers
Not worry about it
Provide proper cribbing to help support the crane tires and load
2. You should use a float (mat) under a crane's outrigger steel pads:
At all times
When you have them handy
When the crane is on uneven ground
When the ground surface is not strong enough to support the high
concentration of pressure from the outrigger's steel pads
3. Who is primarily responsible for ensuring the accurate weight of a load
before it is lifted by a crane?
The crane operator
The safety officer
The site supervisor
The load engineer
4. If a crane operator is working near power lines rated at 50 kV, what steps
should they take to ensure compliance with OSHA 1926.1408?
, Reduce the load to minimize risk.
Use a taller crane to reach over the power lines.
Ignore the power lines as they are not a concern.
Ensure the crane maintains a minimum clearance of 10 feet from the
power lines.
5. Which boom configuration can cause the most hazardous boom side loading
condition?
Long boom with minimum radius
Long boom at 45° angle
Short boom with minimum radius
Short boom at 45° angle
6. Describe the significance of maintaining the minimum clearance from power
lines when operating a crane.
Maintaining the minimum clearance from power lines is crucial to
prevent electrical hazards and ensure the safety of crane operators
and personnel.
The minimum clearance is only a recommendation and can be
adjusted based on the operator's judgment.
The clearance is only necessary for cranes lifting heavy loads.
Clearance from power lines is not important as long as the crane is
not in motion.
7. The only time you may make a lift on outriggers that are less than fully
extended is when:
Working beside the highway and you can't block a lane
, You are only lifting light loads
There is a load chart for this operation
The main boom is being lifted
8. Referring to OSHA, if you know the voltage level to be 23kV, how much
clearance is required?
6 ft.
8 ft.
10 ft.
20 ft
9. If a mobile crane operator wishes to modify the crane's capacity for a specific
project, what steps should they take to ensure compliance with safety
regulations?
Make modifications based on previous experiences.
Proceed with modifications without any consultation.
Consult with a qualified engineer and obtain necessary approvals.
Only inform the site supervisor about the changes.
10. What best describes what happens when you lift a load out of the water?
The load will stay the same.
The weight of the load on the crane will increase.
The radius will decrease.
You will be able to hoist faster.
, 11. If a personnel platform has a perimeter of 20 feet, how much of that
perimeter must be equipped with grab rails to meet safety regulations?
15 feet
5 feet
10 feet
All 20 feet
12. If an operator finds that the ground is unstable while preparing to level a
mobile crane, what should they do next?
Identify a more stable location for crane setup.
Proceed with leveling the crane regardless of the ground condition.
Adjust the load to compensate for the unstable ground.
Begin lifting operations to test the stability.
13. What is the definition of 'jib offset' in the context of mobile cranes?
The maximum load capacity of the crane.
The angle or distance that the jib extends from the main boom.
The length of the crane's counterweights.
The height of the crane's main boom.
14. How can an operator ensure the radius being displayed by the LMI is
correct?
Referring to the range diagram
Properly reading the manufacturer's load chart
By proper measurement
Exam Questions & 100% Correct Answers | Latest Update
2026 | Certification Exam Prep
1. When the ground is not firm enough to support the crane tires and load you
should?
Do not extend the stabilizer beams fully
Do not use the outriggers
Not worry about it
Provide proper cribbing to help support the crane tires and load
2. You should use a float (mat) under a crane's outrigger steel pads:
At all times
When you have them handy
When the crane is on uneven ground
When the ground surface is not strong enough to support the high
concentration of pressure from the outrigger's steel pads
3. Who is primarily responsible for ensuring the accurate weight of a load
before it is lifted by a crane?
The crane operator
The safety officer
The site supervisor
The load engineer
4. If a crane operator is working near power lines rated at 50 kV, what steps
should they take to ensure compliance with OSHA 1926.1408?
, Reduce the load to minimize risk.
Use a taller crane to reach over the power lines.
Ignore the power lines as they are not a concern.
Ensure the crane maintains a minimum clearance of 10 feet from the
power lines.
5. Which boom configuration can cause the most hazardous boom side loading
condition?
Long boom with minimum radius
Long boom at 45° angle
Short boom with minimum radius
Short boom at 45° angle
6. Describe the significance of maintaining the minimum clearance from power
lines when operating a crane.
Maintaining the minimum clearance from power lines is crucial to
prevent electrical hazards and ensure the safety of crane operators
and personnel.
The minimum clearance is only a recommendation and can be
adjusted based on the operator's judgment.
The clearance is only necessary for cranes lifting heavy loads.
Clearance from power lines is not important as long as the crane is
not in motion.
7. The only time you may make a lift on outriggers that are less than fully
extended is when:
Working beside the highway and you can't block a lane
, You are only lifting light loads
There is a load chart for this operation
The main boom is being lifted
8. Referring to OSHA, if you know the voltage level to be 23kV, how much
clearance is required?
6 ft.
8 ft.
10 ft.
20 ft
9. If a mobile crane operator wishes to modify the crane's capacity for a specific
project, what steps should they take to ensure compliance with safety
regulations?
Make modifications based on previous experiences.
Proceed with modifications without any consultation.
Consult with a qualified engineer and obtain necessary approvals.
Only inform the site supervisor about the changes.
10. What best describes what happens when you lift a load out of the water?
The load will stay the same.
The weight of the load on the crane will increase.
The radius will decrease.
You will be able to hoist faster.
, 11. If a personnel platform has a perimeter of 20 feet, how much of that
perimeter must be equipped with grab rails to meet safety regulations?
15 feet
5 feet
10 feet
All 20 feet
12. If an operator finds that the ground is unstable while preparing to level a
mobile crane, what should they do next?
Identify a more stable location for crane setup.
Proceed with leveling the crane regardless of the ground condition.
Adjust the load to compensate for the unstable ground.
Begin lifting operations to test the stability.
13. What is the definition of 'jib offset' in the context of mobile cranes?
The maximum load capacity of the crane.
The angle or distance that the jib extends from the main boom.
The length of the crane's counterweights.
The height of the crane's main boom.
14. How can an operator ensure the radius being displayed by the LMI is
correct?
Referring to the range diagram
Properly reading the manufacturer's load chart
By proper measurement
