NCCCO CORE MIDTERM EXAM
QUESTIONS WITH VERIFIED ANSWERS
2026/2027
1. According to OSHA 1926.1408, what is the minimum clearance distance for power lines
rated up to 50kV?
A. 20 feet
B. 15 feet
C. 10 feet
D. 25 feet
Answer: C
Conceptual Explanation: OSHA specifies a minimum clearance of 10 feet for power lines
up to 50kV to prevent accidental contact and electrocution.
2. In crane load charts, what does the bold line or shaded area typically indicate?
A. The difference between static and dynamic loads
B. The range of operation where taglines are required
C. The maximum boom extension limit
,D. The division between stability-limited and structural-strength-limited capacities
Answer: D
Conceptual Explanation: Capacities above the bold line are usually limited by structural
strength, while those below are limited by the crane’s stability (tipping).
3. What is the ‘radius’ of a crane defined as?
A. The horizontal distance from the center of rotation to the center of gravity of the load
B. The distance from the tip of the boom to the ground
C. The total length of the boom plus the jib
D. The distance from the front outriggers to the load
Answer: A
Conceptual Explanation: Radius is measured horizontally from the center of rotation
(axis) to the vertical load line (center of gravity of the load).
4. If a crane is not level by just 1 degree, how much capacity can be lost on a long boom?
A. Up to 50%
B. Up to 15%
C. Up to 30%
D. Up to 5%
Answer: A
, Conceptual Explanation: Being out of level creates side loading and increases radius; on
long booms, even 1-3 degrees can reduce capacity by as much as 50%.
5. Which of the following is considered a ‘deduction’ from the crane’s gross capacity to
determine net capacity?
A. The weight of the load itself
B. The weight of the headache ball and rigging
C. The weight of the boom
D. The weight of the counterweight
Answer: B
Conceptual Explanation: Net capacity = Gross capacity minus deductions (rigging, blocks,
balls, stowed jibs, etc.). The load itself is what you compare against the net capacity.
6. What is the design factor for standard running wire rope used on cranes?
A. 2.0 to 1
B. 10.0 to 1
C. 5.0 to 1
D. 3.5 to 1
Answer: D
Conceptual Explanation: ASME B30.5 requires a minimum design factor of 3.5:1 for
running ropes under normal operating conditions.
QUESTIONS WITH VERIFIED ANSWERS
2026/2027
1. According to OSHA 1926.1408, what is the minimum clearance distance for power lines
rated up to 50kV?
A. 20 feet
B. 15 feet
C. 10 feet
D. 25 feet
Answer: C
Conceptual Explanation: OSHA specifies a minimum clearance of 10 feet for power lines
up to 50kV to prevent accidental contact and electrocution.
2. In crane load charts, what does the bold line or shaded area typically indicate?
A. The difference between static and dynamic loads
B. The range of operation where taglines are required
C. The maximum boom extension limit
,D. The division between stability-limited and structural-strength-limited capacities
Answer: D
Conceptual Explanation: Capacities above the bold line are usually limited by structural
strength, while those below are limited by the crane’s stability (tipping).
3. What is the ‘radius’ of a crane defined as?
A. The horizontal distance from the center of rotation to the center of gravity of the load
B. The distance from the tip of the boom to the ground
C. The total length of the boom plus the jib
D. The distance from the front outriggers to the load
Answer: A
Conceptual Explanation: Radius is measured horizontally from the center of rotation
(axis) to the vertical load line (center of gravity of the load).
4. If a crane is not level by just 1 degree, how much capacity can be lost on a long boom?
A. Up to 50%
B. Up to 15%
C. Up to 30%
D. Up to 5%
Answer: A
, Conceptual Explanation: Being out of level creates side loading and increases radius; on
long booms, even 1-3 degrees can reduce capacity by as much as 50%.
5. Which of the following is considered a ‘deduction’ from the crane’s gross capacity to
determine net capacity?
A. The weight of the load itself
B. The weight of the headache ball and rigging
C. The weight of the boom
D. The weight of the counterweight
Answer: B
Conceptual Explanation: Net capacity = Gross capacity minus deductions (rigging, blocks,
balls, stowed jibs, etc.). The load itself is what you compare against the net capacity.
6. What is the design factor for standard running wire rope used on cranes?
A. 2.0 to 1
B. 10.0 to 1
C. 5.0 to 1
D. 3.5 to 1
Answer: D
Conceptual Explanation: ASME B30.5 requires a minimum design factor of 3.5:1 for
running ropes under normal operating conditions.
