TLL Exams Latest Update

NCCCO Mobile Crane Operator (TSS & TLL) Exams | Latest / Update | Verified Questions and 100% Correct Answers | Grade A Certified Prep

Section 1: Introduction

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Section 2: Exam Questions and Answers

Core Exam (Mobile Crane Operator)

• What is the first step before operating a mobile crane on a new job site?
• Extend the outriggers
• Perform a site hazard assessment
• Attach the load to the hook
• Check the hydraulic fluid level

Correct Answer: B. Perform a site hazard assessment

Rationale: OSHA 1926.1402 requires a site hazard assessment to identify risks like power lines, soft ground, or obstructions before crane setup.

• What does the gross capacity on a crane’s load chart include?
• Load weight only
• Load, rigging, and attachments
• Crane’s weight
• Counterweight weight

Correct Answer: B. Load, rigging, and attachments

Rationale: Gross capacity includes the load, hook block, slings, and other

attachments, as specified by the crane’s load chart per ASME B30.5.

• When must the anti-two-block device be inspected?
• During the lift
• Before each shift 1 / 2

• Weekly
• After each lift

Correct Answer: B. Before each shift

Rationale: NCCCO and ASME B30.5 require testing the anti-two-block device

before each shift to prevent boom damage or load drop.

• What is the minimum clearance from a 75 kV power line during crane operations?
• 10 feet
• 15 feet
• 20 feet
• 25 feet

Correct Answer: C. 20 feet

Rationale: OSHA 1926.1408 mandates a 20-foot clearance for power lines between

50–200 kV to prevent electrocution.

• What should an operator do if a hydraulic leak is detected during setup?
• Proceed with light loads
• Stop operations and report the leak
• Increase hydraulic pressure
• Continue the lift slowly

Correct Answer: B. Stop operations and report the leak

Rationale: Hydraulic leaks pose a safety risk, requiring immediate cessation and repair per OSHA 1926.1417.

• What is the purpose of a crane’s level indicator?
• To measure load weight
• To ensure the crane is level
• To monitor boom angle
• To check wind speed

Correct Answer: B. To ensure the crane is level

Rationale: A level indicator confirms the crane is on stable, level ground, critical for safe operation per ASME B30.5.

• What does “two-blocking” mean in crane operations?
• Lifting two loads at once
• Hook block contacting the boom tip
• Using two slings
• Blocking the load’s path

Correct Answer: B. Hook block contacting the boom tip

Rationale: Two-blocking risks cable damage or load drop, prevented by the anti-two- block device per NCCCO standards.

• If a load chart is unavailable, what should the operator do?
• Use a chart from another crane
• Estimate the capacity
• Stop operations until a chart is obtained
• Proceed with small loads

Correct Answer: C. Stop operations until a chart is obtained

Rationale: Operating without a load chart violates OSHA 1926.1417 and NCCCO

requirements for safe lifting.

• What is the primary role of outriggers on a mobile crane?
• To extend the boom
• To stabilize the crane
• To reduce load weight
• To adjust counterweights
• / 2