1|Page
Mobile Crane Operator Core Review Questions with
Correct Answers Pass the Exam, 100% Verified (2026
/ 2027) Graded A+
1. Before setting up a mobile crane at a construction site, which
condition should the operator verify because inadequate ground support
can result in crane instability or overturning?
A. The engine has reached maximum operating temperature
B. The ground is firm, drained, graded, and capable of supporting the
crane and imposed loads
C. The boom is fully extended before the crane is leveled
D. The counterweight is removed during setup
Answer: B
2. A mobile crane is being positioned on soil that appears soft and
saturated. What is the most appropriate action before beginning the lift?
A. Increase the engine speed to compensate for unstable ground
B. Reduce the load radius without evaluating the ground
C. Have the ground conditions evaluated and provide adequate
supporting materials or reinforcement as required
D. Extend the boom completely to increase stability
Answer: C
3. What is the primary purpose of placing properly designed mats or
cribbing beneath outrigger floats?
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A. To increase the crane's maximum boom length
B. To distribute the outrigger reaction over a larger area and reduce
ground pressure
C. To eliminate the need for leveling the crane
D. To increase the rated capacity beyond the manufacturer's chart
Answer: B
4. The operator is preparing a lift using a load chart. Which information
is most important to establish before selecting the rated capacity?
A. Paint color of the crane
B. Operator's preferred engine speed
C. Crane configuration, boom length, load radius, counterweight, and
outrigger/crawler configuration
D. Number of workers standing near the crane
Answer: C
5. A crane's load chart lists a capacity of 20,000 lb for a particular
configuration. The rigging and load-handling devices that must be
deducted total 1,500 lb. What is the approximate net capacity available
for the payload?
A. 18,500 lb
B. 20,000 lb
C. 21,500 lb
D. 19,850 lb
Answer: A
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6. As the operating radius of a mobile crane increases while other
conditions remain constant, what generally happens to the crane's rated
lifting capacity?
A. It increases substantially.
B. It remains exactly the same.
C. It generally decreases.
D. It becomes independent of boom length.
Answer: C
7. Why is it dangerous to determine lifting capacity solely from the
weight of the load?
A. Load charts do not consider crane configuration or radius.
B. The crane's capacity is affected by configuration, radius, boom
length, stability, structural limitations, and applicable deductions.
C. The load weight is irrelevant to crane operations.
D. The operator can always lift twice the listed capacity at low engine
speed.
Answer: B
8. A crane operator notices that the load chart being used does not
correspond to the crane's actual boom and counterweight configuration.
What should the operator do?
A. Use the chart anyway if the load is relatively light.
B. Estimate the capacity from a similar crane.
C. Stop and obtain the correct manufacturer's load chart for the actual
configuration.
D. Increase the parts of line until the chart becomes applicable.
, 4|Page
Answer: C
9. Which statement best describes net capacity when determining
whether a lift can safely be made?
A. It is the gross chart capacity plus the weight of the rigging.
B. It is the manufacturer's maximum theoretical crane weight.
C. It is the available capacity after applicable deductions are accounted
for.
D. It is always equal to the crane's rated maximum capacity.
Answer: C
10. A mobile crane is operating with a telescopic boom. Which
condition can create a dangerous side load on the boom?
A. A perfectly vertical load line
B. Pulling or dragging a load horizontally rather than lifting it vertically
C. Keeping the load directly below the boom tip
D. Maintaining the manufacturer's recommended operating
configuration
Answer: B
11. During a lift, the operator notices that the load begins swinging
unexpectedly. What is the safest general response?
A. Make abrupt control movements to stop the swing immediately.
B. Continue increasing hoist speed.
C. Use smooth, controlled movements and allow the swing to diminish
Mobile Crane Operator Core Review Questions with
Correct Answers Pass the Exam, 100% Verified (2026
/ 2027) Graded A+
1. Before setting up a mobile crane at a construction site, which
condition should the operator verify because inadequate ground support
can result in crane instability or overturning?
A. The engine has reached maximum operating temperature
B. The ground is firm, drained, graded, and capable of supporting the
crane and imposed loads
C. The boom is fully extended before the crane is leveled
D. The counterweight is removed during setup
Answer: B
2. A mobile crane is being positioned on soil that appears soft and
saturated. What is the most appropriate action before beginning the lift?
A. Increase the engine speed to compensate for unstable ground
B. Reduce the load radius without evaluating the ground
C. Have the ground conditions evaluated and provide adequate
supporting materials or reinforcement as required
D. Extend the boom completely to increase stability
Answer: C
3. What is the primary purpose of placing properly designed mats or
cribbing beneath outrigger floats?
,2|Page
A. To increase the crane's maximum boom length
B. To distribute the outrigger reaction over a larger area and reduce
ground pressure
C. To eliminate the need for leveling the crane
D. To increase the rated capacity beyond the manufacturer's chart
Answer: B
4. The operator is preparing a lift using a load chart. Which information
is most important to establish before selecting the rated capacity?
A. Paint color of the crane
B. Operator's preferred engine speed
C. Crane configuration, boom length, load radius, counterweight, and
outrigger/crawler configuration
D. Number of workers standing near the crane
Answer: C
5. A crane's load chart lists a capacity of 20,000 lb for a particular
configuration. The rigging and load-handling devices that must be
deducted total 1,500 lb. What is the approximate net capacity available
for the payload?
A. 18,500 lb
B. 20,000 lb
C. 21,500 lb
D. 19,850 lb
Answer: A
,3|Page
6. As the operating radius of a mobile crane increases while other
conditions remain constant, what generally happens to the crane's rated
lifting capacity?
A. It increases substantially.
B. It remains exactly the same.
C. It generally decreases.
D. It becomes independent of boom length.
Answer: C
7. Why is it dangerous to determine lifting capacity solely from the
weight of the load?
A. Load charts do not consider crane configuration or radius.
B. The crane's capacity is affected by configuration, radius, boom
length, stability, structural limitations, and applicable deductions.
C. The load weight is irrelevant to crane operations.
D. The operator can always lift twice the listed capacity at low engine
speed.
Answer: B
8. A crane operator notices that the load chart being used does not
correspond to the crane's actual boom and counterweight configuration.
What should the operator do?
A. Use the chart anyway if the load is relatively light.
B. Estimate the capacity from a similar crane.
C. Stop and obtain the correct manufacturer's load chart for the actual
configuration.
D. Increase the parts of line until the chart becomes applicable.
, 4|Page
Answer: C
9. Which statement best describes net capacity when determining
whether a lift can safely be made?
A. It is the gross chart capacity plus the weight of the rigging.
B. It is the manufacturer's maximum theoretical crane weight.
C. It is the available capacity after applicable deductions are accounted
for.
D. It is always equal to the crane's rated maximum capacity.
Answer: C
10. A mobile crane is operating with a telescopic boom. Which
condition can create a dangerous side load on the boom?
A. A perfectly vertical load line
B. Pulling or dragging a load horizontally rather than lifting it vertically
C. Keeping the load directly below the boom tip
D. Maintaining the manufacturer's recommended operating
configuration
Answer: B
11. During a lift, the operator notices that the load begins swinging
unexpectedly. What is the safest general response?
A. Make abrupt control movements to stop the swing immediately.
B. Continue increasing hoist speed.
C. Use smooth, controlled movements and allow the swing to diminish
