NCCCO CRANE OPERATOR
PROFESSIONAL CERTIFICATION
EXAM
1. When leveling a mobile crane, what is the maximum allowable tolerance for the crane to
be out of level according to ASME B30.5?
A. 1 percent
B. 2 percent
C. 3 percent
D. 5 percent
Answer: A
Conceptual Explanation: According to ASME B30.5 and most manufacturer specifications,
a crane must be within 1 percent of level (1 foot in 100 feet) to ensure the load chart values
remain valid.
2. When working near power lines of 50kV, what is the minimum clearance distance required
by OSHA 1926.1408 if the voltage is not known?
A. 10 feet
,B. 20 feet
C. 15 feet
D. 45 feet
Answer: B
Conceptual Explanation: OSHA 1926.1408 requires a minimum clearance of 20 feet for
lines up to 350kV when the voltage is not confirmed, though for specifically 50kV, 10 feet is
the Table A minimum; however, 20 feet is the standard safety buffer often tested.
3. What is the design factor for rotation-resistant wire rope used as a running rope?
A. 3.5 to 1
B. 10 to 1
C. 7 to 1
D. 5 to 1
Answer: B
Conceptual Explanation: Rotation-resistant wire rope requires a higher design factor of
10:1 because of its complex construction and susceptibility to internal damage compared
to standard rope (5:1).
4. A crane is lifting a load from the side. This ‘side loading’ most likely results in:
A. Structural failure of the boom
B. Increased stability
, C. Faster hoist speeds
D. Automatic LMI calibration
Answer: A
Conceptual Explanation: Booms are designed to handle vertical loads. Side loading
introduces lateral stresses for which the boom is not designed, leading to potential
structural collapse.
5. When calculating the net capacity of a crane, what should be done with the weight of the
rigging hardware?
A. It is ignored
B. It is added to the net capacity
C. It is multiplied by the safety factor
D. It is subtracted from the gross capacity
Answer: D
Conceptual Explanation: Net Capacity = Gross Capacity - Deductions. Rigging, blocks, and
balls are considered deductions and must be subtracted from the gross capacity.
6. According to OSHA, how many broken wires in one rope lay are permitted for a standing
wire rope?
A. 1
B. 3
PROFESSIONAL CERTIFICATION
EXAM
1. When leveling a mobile crane, what is the maximum allowable tolerance for the crane to
be out of level according to ASME B30.5?
A. 1 percent
B. 2 percent
C. 3 percent
D. 5 percent
Answer: A
Conceptual Explanation: According to ASME B30.5 and most manufacturer specifications,
a crane must be within 1 percent of level (1 foot in 100 feet) to ensure the load chart values
remain valid.
2. When working near power lines of 50kV, what is the minimum clearance distance required
by OSHA 1926.1408 if the voltage is not known?
A. 10 feet
,B. 20 feet
C. 15 feet
D. 45 feet
Answer: B
Conceptual Explanation: OSHA 1926.1408 requires a minimum clearance of 20 feet for
lines up to 350kV when the voltage is not confirmed, though for specifically 50kV, 10 feet is
the Table A minimum; however, 20 feet is the standard safety buffer often tested.
3. What is the design factor for rotation-resistant wire rope used as a running rope?
A. 3.5 to 1
B. 10 to 1
C. 7 to 1
D. 5 to 1
Answer: B
Conceptual Explanation: Rotation-resistant wire rope requires a higher design factor of
10:1 because of its complex construction and susceptibility to internal damage compared
to standard rope (5:1).
4. A crane is lifting a load from the side. This ‘side loading’ most likely results in:
A. Structural failure of the boom
B. Increased stability
, C. Faster hoist speeds
D. Automatic LMI calibration
Answer: A
Conceptual Explanation: Booms are designed to handle vertical loads. Side loading
introduces lateral stresses for which the boom is not designed, leading to potential
structural collapse.
5. When calculating the net capacity of a crane, what should be done with the weight of the
rigging hardware?
A. It is ignored
B. It is added to the net capacity
C. It is multiplied by the safety factor
D. It is subtracted from the gross capacity
Answer: D
Conceptual Explanation: Net Capacity = Gross Capacity - Deductions. Rigging, blocks, and
balls are considered deductions and must be subtracted from the gross capacity.
6. According to OSHA, how many broken wires in one rope lay are permitted for a standing
wire rope?
A. 1
B. 3
