Mobile Crane Operator Exam Prep Questions | Real
Questions & Accurate Answers | Latest 2026 Edition
1. Who is responsible for ensuring that the durable rating chart is accessible for
each crane?
The crane operator
The maintenance technician
The site manager
The safety officer
2. What is the second basis for determining the capacity in a mobile crane's load
chart, alongside structural limits?
Stability limits
Operational limits
Weight limits
Rigging limits
3. What is a key requirement for a crane's tires and support during setup?
They should be properly inflated and stable.
They should be removed for maintenance.
They should be flat and on uneven ground.
They should be over-inflated for better performance.
4. What should an operator do before leaving a crane that is in contact with
energized power lines?
Exit the crane immediately.
, Turn off the crane's power.
Stay in the crane and call for help.
Attempt to move the crane away from the lines.
5. Why is it important to maintain a safe distance from power lines when
operating a crane?
To improve the crane's lifting capacity.
To reduce the time taken for crane setup.
To allow for better visibility of the load.
To prevent electrical hazards and ensure operator safety.
6. For a crane or load in operation near power lines that are under 50 kV, what
is the minimum clearance distance between the equipment and the power
lines?
4 feet.
100 feet.
10 feet plus 0.4 inches for each 1 kV over 50 kV.
10 feet.
7. If a crane's drum flange extends less than the required distance over the top
layer of wire rope, what potential issues could arise during lifting operations?
Enhanced stability of the crane during lifting.
Improved lifting efficiency and speed.
No significant impact on safety or operations.
Increased risk of wire rope slippage and potential accidents.
,8. What is the formula to calculate net capacity from gross capacity and total
deductions?
Net Capacity = Gross Capacity + Total Deductions
Net Capacity = Gross Capacity * Total Deductions
Net Capacity = Total Deductions - Gross Capacity
Net Capacity = Gross Capacity - Total Deductions
9. When the weight of a load cannot be determined in other ways, it can be
lifted slightly while monitoring the weight using instruments in the crane. The
lift can proceed if the load is less than _.
85 percent of the crane's capacity at the longest required operating
radius
40 percent of the crane's capacity at the longest required operating
radius
75 percent of the crane's capacity at the longest required operating
radius
100 percent of the crane's capacity at the longest required operating
radius
10. What is the primary factor used to determine the working area chart for the
'over front' area on a telescopic boom truck?
The height of the boom
The weight of the load
The position of the outriggers
The type of crane
, 11. If a crane has a D/d ratio of 2:1, what does this imply about the crane's lifting
capability and stability when lifting a heavy load?
It suggests that the crane's lifting speed will be faster.
It indicates that the crane can lift heavier loads without any risk.
It means the crane is not stable and should not lift any load.
It implies that the crane has a greater distance from the load to the
center of rotation compared to the support point, enhancing
stability during the lift.
12. Describe the significance of having a qualified person supervise the
operation of a telescopic boom crane when hoisting a personnel platform.
It reduces the need for maintenance checks.
It simplifies the rigging process.
It allows for more personnel to be lifted at once.
Having a qualified person ensures that safety protocols are
followed and that the operation is conducted correctly.
13. Describe how a work area diagram contributes to crane operation safety.
A work area diagram outlines the types of cranes available for use.
A work area diagram serves as a checklist for crane maintenance.
A work area diagram is used to calculate the weight of loads being
lifted.
A work area diagram helps identify safety zones and potential
hazards, ensuring that operators can plan safe lifting operations.
14. The term "upperworks" or "superstructure" refers to the part of the crane:
Questions & Accurate Answers | Latest 2026 Edition
1. Who is responsible for ensuring that the durable rating chart is accessible for
each crane?
The crane operator
The maintenance technician
The site manager
The safety officer
2. What is the second basis for determining the capacity in a mobile crane's load
chart, alongside structural limits?
Stability limits
Operational limits
Weight limits
Rigging limits
3. What is a key requirement for a crane's tires and support during setup?
They should be properly inflated and stable.
They should be removed for maintenance.
They should be flat and on uneven ground.
They should be over-inflated for better performance.
4. What should an operator do before leaving a crane that is in contact with
energized power lines?
Exit the crane immediately.
, Turn off the crane's power.
Stay in the crane and call for help.
Attempt to move the crane away from the lines.
5. Why is it important to maintain a safe distance from power lines when
operating a crane?
To improve the crane's lifting capacity.
To reduce the time taken for crane setup.
To allow for better visibility of the load.
To prevent electrical hazards and ensure operator safety.
6. For a crane or load in operation near power lines that are under 50 kV, what
is the minimum clearance distance between the equipment and the power
lines?
4 feet.
100 feet.
10 feet plus 0.4 inches for each 1 kV over 50 kV.
10 feet.
7. If a crane's drum flange extends less than the required distance over the top
layer of wire rope, what potential issues could arise during lifting operations?
Enhanced stability of the crane during lifting.
Improved lifting efficiency and speed.
No significant impact on safety or operations.
Increased risk of wire rope slippage and potential accidents.
,8. What is the formula to calculate net capacity from gross capacity and total
deductions?
Net Capacity = Gross Capacity + Total Deductions
Net Capacity = Gross Capacity * Total Deductions
Net Capacity = Total Deductions - Gross Capacity
Net Capacity = Gross Capacity - Total Deductions
9. When the weight of a load cannot be determined in other ways, it can be
lifted slightly while monitoring the weight using instruments in the crane. The
lift can proceed if the load is less than _.
85 percent of the crane's capacity at the longest required operating
radius
40 percent of the crane's capacity at the longest required operating
radius
75 percent of the crane's capacity at the longest required operating
radius
100 percent of the crane's capacity at the longest required operating
radius
10. What is the primary factor used to determine the working area chart for the
'over front' area on a telescopic boom truck?
The height of the boom
The weight of the load
The position of the outriggers
The type of crane
, 11. If a crane has a D/d ratio of 2:1, what does this imply about the crane's lifting
capability and stability when lifting a heavy load?
It suggests that the crane's lifting speed will be faster.
It indicates that the crane can lift heavier loads without any risk.
It means the crane is not stable and should not lift any load.
It implies that the crane has a greater distance from the load to the
center of rotation compared to the support point, enhancing
stability during the lift.
12. Describe the significance of having a qualified person supervise the
operation of a telescopic boom crane when hoisting a personnel platform.
It reduces the need for maintenance checks.
It simplifies the rigging process.
It allows for more personnel to be lifted at once.
Having a qualified person ensures that safety protocols are
followed and that the operation is conducted correctly.
13. Describe how a work area diagram contributes to crane operation safety.
A work area diagram outlines the types of cranes available for use.
A work area diagram serves as a checklist for crane maintenance.
A work area diagram is used to calculate the weight of loads being
lifted.
A work area diagram helps identify safety zones and potential
hazards, ensuring that operators can plan safe lifting operations.
14. The term "upperworks" or "superstructure" refers to the part of the crane:
