NCCCO CORE PREP TEST
(ALTERNATE) QUESTIONS WITH
VERIFIED ANSWERS 2026/2027
1. According to OSHA 1926.1408, what is the minimum clearance distance for a power line
rated at 350kV when the voltage is known?
A. 10 feet
B. 25 feet
C. 20 feet
D. 50 feet
Answer: B
Conceptual Explanation: According to OSHA Table A, for voltages between 350kV and
500kV, the minimum clearance is 25 feet.
2. When inspecting rotation-resistant wire rope, what is the removal criteria for broken
wires?
A. 6 broken wires in one lay
B. 2 broken wires in 6 rope diameters
,C. 3 broken wires in one strand in one lay
D. 12 broken wires in one lay
Answer: B
Conceptual Explanation: For rotation-resistant rope, the criteria is 2 broken wires in 6
rope diameters or 4 broken wires in 30 rope diameters.
3. A bold line or a shaded area on a load chart indicates that the capacities are based on:
A. Stability (tipping)
B. Hydraulic pressure
C. Wire rope strength
D. Structural strength
Answer: D
Conceptual Explanation: Values above the bold line or in shaded areas are based on the
structural integrity of the crane, not tipping.
4. How is the ‘load radius’ measured on a mobile crane?
A. From the tip of the boom to the ground
B. From the boom foot pin to the center of gravity of the load
C. From the front of the tires to the load
D. From the center of rotation to the center of gravity of the load
, Answer: D
Conceptual Explanation: Radius is the horizontal distance from the center of rotation to
the vertical hoist line or center of gravity of the load.
5. When calculating the net capacity of a crane, which of the following is NOT typically
considered a deduction?
A. The weight of the load itself
B. The weight of the rigging
C. The weight of the load block
D. The weight of a stowed jib
Answer: A
Conceptual Explanation: Net capacity is the amount of load the crane can actually lift after
subtracting the weight of the block, rigging, and other attachments from the gross capacity.
6. What is the effect of boom deflection on the load radius?
A. It increases the radius
B. It has no effect on the radius
C. It decreases the radius
D. It causes the boom to retract
Answer: A
(ALTERNATE) QUESTIONS WITH
VERIFIED ANSWERS 2026/2027
1. According to OSHA 1926.1408, what is the minimum clearance distance for a power line
rated at 350kV when the voltage is known?
A. 10 feet
B. 25 feet
C. 20 feet
D. 50 feet
Answer: B
Conceptual Explanation: According to OSHA Table A, for voltages between 350kV and
500kV, the minimum clearance is 25 feet.
2. When inspecting rotation-resistant wire rope, what is the removal criteria for broken
wires?
A. 6 broken wires in one lay
B. 2 broken wires in 6 rope diameters
,C. 3 broken wires in one strand in one lay
D. 12 broken wires in one lay
Answer: B
Conceptual Explanation: For rotation-resistant rope, the criteria is 2 broken wires in 6
rope diameters or 4 broken wires in 30 rope diameters.
3. A bold line or a shaded area on a load chart indicates that the capacities are based on:
A. Stability (tipping)
B. Hydraulic pressure
C. Wire rope strength
D. Structural strength
Answer: D
Conceptual Explanation: Values above the bold line or in shaded areas are based on the
structural integrity of the crane, not tipping.
4. How is the ‘load radius’ measured on a mobile crane?
A. From the tip of the boom to the ground
B. From the boom foot pin to the center of gravity of the load
C. From the front of the tires to the load
D. From the center of rotation to the center of gravity of the load
, Answer: D
Conceptual Explanation: Radius is the horizontal distance from the center of rotation to
the vertical hoist line or center of gravity of the load.
5. When calculating the net capacity of a crane, which of the following is NOT typically
considered a deduction?
A. The weight of the load itself
B. The weight of the rigging
C. The weight of the load block
D. The weight of a stowed jib
Answer: A
Conceptual Explanation: Net capacity is the amount of load the crane can actually lift after
subtracting the weight of the block, rigging, and other attachments from the gross capacity.
6. What is the effect of boom deflection on the load radius?
A. It increases the radius
B. It has no effect on the radius
C. It decreases the radius
D. It causes the boom to retract
Answer: A
