NCCCO Mobile Crane Exam Questions
and answers| fall 2026/2027 Latest
1. What is the minimum OSHA requirement for ground conditions when setting up
a crane?
A) The ground must be firm, drained, and graded
B) The ground must be compacted to 95% density
C) The ground must be paved with asphalt
D) The ground must be level within 1 degree
Correct Answer: A
Rationale: OSHA 1926.1402 requires that ground conditions be firm, drained, and
graded, and that the crane be positioned to provide a level, stable foundation. The crane
must be level within 1% of grade (approximately 0.6 degrees).
2. What is the proper procedure for using crane outriggers?
A) Only extend outriggers as needed
B) Fully extend outriggers and use cribbing under floats
C) Extend outriggers only when lifting heavy loads
D) Use outriggers only on soft ground
Correct Answer: B
Rationale: Outriggers must be fully extended and properly cribbed (blocked) under
floats to distribute the load evenly and prevent sinking. The use of cribbing is essential
on all surfaces to ensure stability.
3. What is the maximum allowable slope for a crane when using outriggers?
A) 1% (0.6°)
B) 2% (1.2°)
C) 5% (3°)
D) 10% (6°)
,Correct Answer: A
Rationale: The crane must be level within 1% of grade (approximately 0.6 degrees)
when using outriggers to ensure stability and prevent tipping.
4. What is the purpose of cribbing under outrigger floats?
A) To increase the crane's lifting capacity
B) To distribute the load over a larger area
C) To reduce the need for outrigger extension
D) To increase the crane's stability
Correct Answer: B
Rationale: Cribbing under outrigger floats distributes the load over a larger area,
preventing the floats from sinking and ensuring stability.
5. How often should the operator inspect the crane's outriggers?
A) Only during annual inspections
B) Each shift before use
C) Weekly
D) Monthly
Correct Answer: B
Rationale: The operator should inspect the crane's outriggers each shift before use to
ensure they are functioning properly.
6. What should the operator do if the ground is soft or uneven?
A) Use larger floats
B) Use extensive cribbing
C) Use a larger crane
D) Both A and B
Correct Answer: D
Rationale: On soft or uneven ground, the operator should use larger floats and
extensive cribbing to distribute the load and provide a stable foundation.
7. The crane's load chart is based on the assumption that the crane is:
A) Level
B) On firm ground
, C) Properly set up with outriggers fully extended
D) All of the above
Correct Answer: D
Rationale: The load chart is based on the crane being level, on firm ground, and
properly set up with outriggers fully extended. Any deviation reduces capacity.
8. What is the correct order for extending outriggers?
A) Raise the crane, extend beams, lower floats
B) Extend beams, raise the crane, lower floats
C) Lower floats, raise the crane, extend beams
D) Extend beams, lower floats, raise the crane
Correct Answer: A
Rationale: Raise the crane slightly off the tires, extend outrigger beams, then lower
floats to set the crane on the outriggers.
9. The crane's load chart is not valid when the crane is operating on:
A) Paved surfaces
B) Tires
C) Outriggers
D) Cribbing
Correct Answer: B
Rationale: Load charts for crawler cranes are based on tracks on firm ground; for mobile
cranes, load charts require the crane to be on outriggers. Operating on tires significantly
reduces capacity.
10. When setting up a crane on a slope, the operator should:
A) Park the crane perpendicular to the slope
B) Park the crane parallel to the slope
C) Park the crane facing downhill
D) Park the crane facing uphill
Correct Answer: A
Rationale: When parking on a slope, the crane should be positioned perpendicular to
the slope to minimize the risk of tipping.
and answers| fall 2026/2027 Latest
1. What is the minimum OSHA requirement for ground conditions when setting up
a crane?
A) The ground must be firm, drained, and graded
B) The ground must be compacted to 95% density
C) The ground must be paved with asphalt
D) The ground must be level within 1 degree
Correct Answer: A
Rationale: OSHA 1926.1402 requires that ground conditions be firm, drained, and
graded, and that the crane be positioned to provide a level, stable foundation. The crane
must be level within 1% of grade (approximately 0.6 degrees).
2. What is the proper procedure for using crane outriggers?
A) Only extend outriggers as needed
B) Fully extend outriggers and use cribbing under floats
C) Extend outriggers only when lifting heavy loads
D) Use outriggers only on soft ground
Correct Answer: B
Rationale: Outriggers must be fully extended and properly cribbed (blocked) under
floats to distribute the load evenly and prevent sinking. The use of cribbing is essential
on all surfaces to ensure stability.
3. What is the maximum allowable slope for a crane when using outriggers?
A) 1% (0.6°)
B) 2% (1.2°)
C) 5% (3°)
D) 10% (6°)
,Correct Answer: A
Rationale: The crane must be level within 1% of grade (approximately 0.6 degrees)
when using outriggers to ensure stability and prevent tipping.
4. What is the purpose of cribbing under outrigger floats?
A) To increase the crane's lifting capacity
B) To distribute the load over a larger area
C) To reduce the need for outrigger extension
D) To increase the crane's stability
Correct Answer: B
Rationale: Cribbing under outrigger floats distributes the load over a larger area,
preventing the floats from sinking and ensuring stability.
5. How often should the operator inspect the crane's outriggers?
A) Only during annual inspections
B) Each shift before use
C) Weekly
D) Monthly
Correct Answer: B
Rationale: The operator should inspect the crane's outriggers each shift before use to
ensure they are functioning properly.
6. What should the operator do if the ground is soft or uneven?
A) Use larger floats
B) Use extensive cribbing
C) Use a larger crane
D) Both A and B
Correct Answer: D
Rationale: On soft or uneven ground, the operator should use larger floats and
extensive cribbing to distribute the load and provide a stable foundation.
7. The crane's load chart is based on the assumption that the crane is:
A) Level
B) On firm ground
, C) Properly set up with outriggers fully extended
D) All of the above
Correct Answer: D
Rationale: The load chart is based on the crane being level, on firm ground, and
properly set up with outriggers fully extended. Any deviation reduces capacity.
8. What is the correct order for extending outriggers?
A) Raise the crane, extend beams, lower floats
B) Extend beams, raise the crane, lower floats
C) Lower floats, raise the crane, extend beams
D) Extend beams, lower floats, raise the crane
Correct Answer: A
Rationale: Raise the crane slightly off the tires, extend outrigger beams, then lower
floats to set the crane on the outriggers.
9. The crane's load chart is not valid when the crane is operating on:
A) Paved surfaces
B) Tires
C) Outriggers
D) Cribbing
Correct Answer: B
Rationale: Load charts for crawler cranes are based on tracks on firm ground; for mobile
cranes, load charts require the crane to be on outriggers. Operating on tires significantly
reduces capacity.
10. When setting up a crane on a slope, the operator should:
A) Park the crane perpendicular to the slope
B) Park the crane parallel to the slope
C) Park the crane facing downhill
D) Park the crane facing uphill
Correct Answer: A
Rationale: When parking on a slope, the crane should be positioned perpendicular to
the slope to minimize the risk of tipping.
