NCCCO CORE EXAM PREP 100

NCCCO CORE EXAM PREP / – 100%

VERIFIED QUESTIONS AND CORRECT

ANSWERS | GRADE A EXAM REVIEW

• What is the minimum clearance distance for a crane operating near a 50 kV power

line, according to OSHA regulations?

• 6 feet
• 10 feet
• 15 feet
• 20 feet

Correct Answer: B

Rationale: OSHA 1926.1408 requires a minimum clearance of 10 feet for power lines up to 50 kV. For each additional 10 kV, the clearance increases by 0.4 inches. This ensures operator safety from electrical hazards.

• What is the primary purpose of a load chart in crane operations?
• To determine the crane’s fuel efficiency
• To calculate the crane’s maximum lifting capacity
• To schedule maintenance intervals
• To record operator certifications

Correct Answer: B

Rationale: The load chart provides the crane’s maximum lifting capacity based on boom length, angle, and radius, ensuring safe lifting within the crane’s limits.

• When inspecting a wire rope, what defect requires immediate replacement?
• Light surface rust
• Two broken wires in one strand
• Severe kinking or crushing
• Minor wear on outer wires

Correct Answer: C

Rationale: ASME B30.5 standards mandate immediate replacement of wire ropes with severe kinking, crushing, or birdcaging, as these defects compromise structural integrity and safety.

• What does the term "duty cycle work" refer to in crane operations?
• Continuous lifting operations without pauses
• Lifting loads at maximum capacity
• Periodic maintenance checks
• Operator training sessions

Correct Answer: A

Rationale: Duty cycle work involves repetitive, continuous lifting operations, such as pile driving or clamshell work, requiring specific load chart reductions to account for dynamic stresses. 1 / 2

• What is the standard hand signal for stopping all crane operations?
• Arm extended, palm down, moving side to side
• Both arms raised vertically
• Arm extended, fist clenched
• Hand tapping head

Correct Answer: A

Rationale: According to ASME B30.5, the standard stop signal is an extended arm with the palm down, moved side to side, ensuring clear communication to halt operations.

• What is the maximum allowable slope for crane setup to ensure stability?
• 1%
• 2%
• 5%

D. 10%

Correct Answer: A

Rationale: NCCCO and ASME B30.5 require the crane to be level within 1% to ensure load chart ratings are valid and to maintain stability during lifting.

• Who is responsible for determining the voltage of nearby power lines before crane

operations begin?

• The crane operator
• The site supervisor
• The utility company
• The rigger

Correct Answer: C

Rationale: OSHA 1926.1407 mandates that the utility company or a qualified person determines the voltage of power lines to ensure proper clearance distances are maintained.

• What is the primary function of outriggers on a mobile crane?
• To increase lifting capacity
• To stabilize the crane
• To extend the boom length
• To adjust the counterweight

Correct Answer: B

Rationale: Outriggers provide additional stability by increasing the crane’s base of support, reducing the risk of tipping during lifting operations.

• What should be done if a crane operator makes contact with a power line?
• Continue operations cautiously
• Stay in the crane until power is de-energized
• Immediately exit the crane
• Move the load away from the line

Correct Answer: B

Rationale: OSHA 1926.1408 advises operators to remain in the crane if it contacts a power line to avoid electrocution, until the utility company confirms the power is off.

• What is the effect of increasing the jib angle on a crane’s radius?
• Increases the radius
• Decreases the radius
• No effect on the radius
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