NCCCO Core Exam Practice Test | 100
Questions & Verified Answers | Crane
Operator Certification Prep
Section 1: Load Charts & Capacity (Questions 1–20)
Question 1
The numbers shown on a crane's load chart represent:
• A) Net capacity
• B) Gross capacity
• C) Deducted capacity
• D) Structural capacity
Correct Answer: A - Net capacity
Rationale: Load charts display net capacity, which is the maximum load
the crane can handle in a specific configuration after all deductions for
rigging, hook block, and other attachments have been considered .
Gross capacity would be before deductions.
Question 2
Crane load charts are designed so the crane begins to tip at what
percentage of rated capacity when operating on rubber?
, • A) 70%
• B) 75%
• C) 80%
• D) 85%
Correct Answer: B - 75%
*Rationale: The 75% tipping factor on rubber provides a safety
margin—the crane will theoretically tip at 133% of rated capacity
(inverse of 75%) . This built-in margin helps prevent actual tip-overs
during operation.*
Question 3
When operating on outriggers with tires touching the ground, the
operator should reference which load chart?
• A) Intermediate chart
• B) Over the front chart
• C) On rubber chart
• D) 85% of on outrigger chart
Correct Answer: C - On rubber chart
Rationale: If outriggers are extended and set but tires still contact the
ground, the crane is not fully supported by outriggers alone. The
operator must use the "on rubber" chart, not the full outrigger chart .
,Question 4
What is the tipping axis of a crawler crane?
• A) Centerline of the tracks
• B) Sprocket offset centerline
• C) Outer edge of the tracks
• D) Boom pivot point
Correct Answer: C - Outer edge of the tracks
Rationale: The tipping axis for a crawler crane is along the outer edge
of the tracks. Crawler cranes are rated at 85% of tipping for stability
purposes .
Question 5
When using cranes of different rated capacities for a multi-crane lift, the
crane with the larger rated capacity should be positioned:
• A) Farther from the load's center of gravity
• B) Closer to the load's center of gravity
• C) At the same distance as the smaller crane
• D) On the opposite side of the load
Correct Answer: B - Closer to the load's center of gravity
Rationale: In multi-crane lifts, the larger capacity crane should be
positioned closer to the load's center of gravity to ensure it carries a
proportionally larger share of the total weight, preventing overload of
the smaller crane .
, Question 6
If no load chart is available for the specific lift configuration, the
operator should:
• A) Perform the lift with caution at 50% capacity
• B) Use a load chart from a similar crane
• C) Not perform the lift at all
• D) Calculate an approximate capacity based on experience
Correct Answer: C - Not perform the lift at all
Rationale: OSHA and NCCCO standards explicitly prohibit lifts without
the correct load chart for the crane's specific configuration. The
operator must refuse the lift .
Question 7
What effect does blocking up the ends of the tracks have on a crawler
crane's capacity?
• A) Decreases capacity over the ends
• B) Increases capacity over the ends
• C) Has no effect on capacity
• D) Only affects side capacity
Correct Answer: B - Increases capacity over the ends
Rationale: Blocking the track ends reduces the effective tipping axis
distance, increasing stability and rated capacity when working over the
end of the crane .
Questions & Verified Answers | Crane
Operator Certification Prep
Section 1: Load Charts & Capacity (Questions 1–20)
Question 1
The numbers shown on a crane's load chart represent:
• A) Net capacity
• B) Gross capacity
• C) Deducted capacity
• D) Structural capacity
Correct Answer: A - Net capacity
Rationale: Load charts display net capacity, which is the maximum load
the crane can handle in a specific configuration after all deductions for
rigging, hook block, and other attachments have been considered .
Gross capacity would be before deductions.
Question 2
Crane load charts are designed so the crane begins to tip at what
percentage of rated capacity when operating on rubber?
, • A) 70%
• B) 75%
• C) 80%
• D) 85%
Correct Answer: B - 75%
*Rationale: The 75% tipping factor on rubber provides a safety
margin—the crane will theoretically tip at 133% of rated capacity
(inverse of 75%) . This built-in margin helps prevent actual tip-overs
during operation.*
Question 3
When operating on outriggers with tires touching the ground, the
operator should reference which load chart?
• A) Intermediate chart
• B) Over the front chart
• C) On rubber chart
• D) 85% of on outrigger chart
Correct Answer: C - On rubber chart
Rationale: If outriggers are extended and set but tires still contact the
ground, the crane is not fully supported by outriggers alone. The
operator must use the "on rubber" chart, not the full outrigger chart .
,Question 4
What is the tipping axis of a crawler crane?
• A) Centerline of the tracks
• B) Sprocket offset centerline
• C) Outer edge of the tracks
• D) Boom pivot point
Correct Answer: C - Outer edge of the tracks
Rationale: The tipping axis for a crawler crane is along the outer edge
of the tracks. Crawler cranes are rated at 85% of tipping for stability
purposes .
Question 5
When using cranes of different rated capacities for a multi-crane lift, the
crane with the larger rated capacity should be positioned:
• A) Farther from the load's center of gravity
• B) Closer to the load's center of gravity
• C) At the same distance as the smaller crane
• D) On the opposite side of the load
Correct Answer: B - Closer to the load's center of gravity
Rationale: In multi-crane lifts, the larger capacity crane should be
positioned closer to the load's center of gravity to ensure it carries a
proportionally larger share of the total weight, preventing overload of
the smaller crane .
, Question 6
If no load chart is available for the specific lift configuration, the
operator should:
• A) Perform the lift with caution at 50% capacity
• B) Use a load chart from a similar crane
• C) Not perform the lift at all
• D) Calculate an approximate capacity based on experience
Correct Answer: C - Not perform the lift at all
Rationale: OSHA and NCCCO standards explicitly prohibit lifts without
the correct load chart for the crane's specific configuration. The
operator must refuse the lift .
Question 7
What effect does blocking up the ends of the tracks have on a crawler
crane's capacity?
• A) Decreases capacity over the ends
• B) Increases capacity over the ends
• C) Has no effect on capacity
• D) Only affects side capacity
Correct Answer: B - Increases capacity over the ends
Rationale: Blocking the track ends reduces the effective tipping axis
distance, increasing stability and rated capacity when working over the
end of the crane .
