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Exam Review

Key Facts: NCCER Mobile Crane Exam

100

Practice Questions

OpenExamPrep NCCER Mobile Crane bank

5 years

Certification Validity

OSHA 29 CFR 1926.1427

10 ft

Minimum Power-Line Clearance

OSHA 1926.1408 (0-50 kV)

ASME B30.5

Governing Crane Standard

Mobile and Locomotive Cranes

75%

Critical Lift Threshold

Industry practice for critical lift definition

18+

Minimum Age

NCCER eligibility

As of May 11, 2026, NCCER's Mobile Crane Operator certification is a distinct OSHA-accredited program separate from NCCCO. Both meet 29 CFR 1926 Subpart CC operator-certification requirements. The written assessment covers site setup, crane operations, technical knowledge, and load chart interpretation aligned to current OSHA Subpart CC and ASME B30.5 concepts. Certification is valid for five years and requires both written and practical components at an NCCER-accredited assessment center.

Sample NCCER Mobile Crane Practice Questions

Try these sample questions to review concepts for the NCCER Mobile Crane exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which federal standard establishes operator-certification requirements for mobile cranes used in construction?

A.OSHA 29 CFR 1910 General Industry

B.OSHA 29 CFR 1926 Subpart CC

C.ANSI A92.5 Boom-Supported Platforms

D.DOT 49 CFR 393 Vehicle Standards

Explanation: OSHA 29 CFR 1926 Subpart CC (specifically 1926.1427) governs operator certification for cranes used in construction. NCCER and NCCCO are both OSHA-accredited certifying bodies that issue certifications meeting this rule.

2What is the primary function of a Load Moment Indicator (LMI) on a mobile crane?

A.It records hoist drum revolutions for maintenance logs

B.It warns the operator and may prevent further motion when the load approaches or exceeds rated capacity

C.It prevents the load block from contacting the boom head

D.It measures wind speed at the boom tip

Explanation: An LMI continuously compares actual load and radius against the manufacturer's chart and provides audible and visual warnings, with shutdown at overload. It is not the same as Anti-Two-Block, which guards against block-to-head contact.

3Under OSHA 1926.1408, what is the minimum clearance distance from energized overhead power lines rated 50 kV or less when operating a mobile crane near them?

A.5 feet

B.10 feet

C.15 feet

D.20 feet

Explanation: OSHA 1926.1408 Table A sets a 10-foot minimum clearance for voltages up to 50 kV. Higher voltages require greater distances (for example, 20 feet at 200 kV and 35 feet at 500 kV).

4Which device prevents the load block or hook from contacting the boom tip during hoist-up motion?

A.Load Moment Indicator (LMI)

B.Anti-Two-Block (ATB) device

C.Boom angle indicator

D.Outrigger position sensor

Explanation: An Anti-Two-Block device uses a weight or limit switch at the boom head that triggers an alarm and stops further hoist-up motion before the block contacts the head. LMI prevents overload, which is a different function.

5Which ASME standard specifically covers mobile and locomotive cranes?

A.ASME B30.3

B.ASME B30.5

C.ASME B30.10

D.ASME B30.20

Explanation: ASME B30.5 Mobile and Locomotive Cranes is the consensus standard for mobile cranes. B30.3 covers construction tower cranes, B30.10 covers hooks, and B30.20 covers below-the-hook lifting devices.

6Who is required by OSHA 1926.1412 to perform the pre-shift visual inspection of a mobile crane?

A.Any worker designated by the foreman

B.A competent person

C.Only the manufacturer's service technician

D.A qualified engineer with a Professional Engineer license

Explanation: OSHA 1926.1412 requires that a competent person perform the pre-shift visual inspection. Monthly inspections are also by a competent person; the annual or comprehensive inspection requires a qualified person.

7What does the ASME B30.5 hand signal of one closed fist held overhead with the arm extended typically indicate?

A.Emergency Stop

B.Stop

C.Boom Down

D.Travel

Explanation: A single closed fist with arm extended is the standard Stop signal in ASME B30.5. Emergency Stop is signaled with both arms extended, palms down, moving back and forth horizontally and can be called by anyone on the lift crew.

8When is the load chart capacity for a mobile crane typically the highest?

A.Lifting over the rear with outriggers fully extended

B.Lifting over the side with outriggers retracted

C.Lifting over the rear on rubber

D.Lifting at the longest boom length

Explanation: Capacity is highest over the rear (or sometimes over the front depending on the machine) with outriggers fully extended because stability is maximized. Lifting over the side, on rubber, or at long radius significantly reduces capacity.

9A crane manufacturer lists rated capacity at a specific radius. What does "radius" mean on a mobile crane load chart?

A.The horizontal distance from the center of rotation to the center of the load

B.The length of the boom from foot pin to tip

C.The boom angle relative to horizontal

D.The distance from outrigger float to load

Explanation: Load radius is the horizontal distance from the center of crane rotation to the center of the hook or load, measured with the load suspended. Boom length and angle are separate parameters that influence radius.

10Which mobile crane variant is generally best suited for travel on improved highways at conventional truck speeds and typically requires a CDL?

A.Crawler crane

B.Rough-terrain (RT) crane

C.Truck-mounted (boom truck) crane

D.Lattice boom rail crane

Explanation: Truck-mounted (carrier or boom truck) cranes are built on a commercial truck chassis for highway travel and usually require a Commercial Driver's License. RT cranes travel slowly off-road; crawler cranes do not self-travel on highways at all.

About the NCCER Mobile Crane Exam

The NCCER Mobile Crane Operator certification is an OSHA-accredited alternative to NCCCO that meets 29 CFR 1926 Subpart CC operator-certification requirements. NCCER focuses on the construction industry and pairs a written assessment with a practical performance evaluation covering setup, load chart interpretation, communication, and safe operation.

Exam sponsor: NCCER and NCCER-accredited assessment centers. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Written assessment of approximately 100 questions plus a practical performance evaluation; both components are administered at NCCER-accredited assessment centers and meet OSHA 1926 Subpart CC operator-certification requirements

Time Limit

Approximately 2 hours for the written portion

Passing Score

Pass/fail (NCCER does not publish a current public numeric written cut score)

Exam / Certification Fees

Varies by NCCER-accredited assessment center

Exam sponsor website

Reported exam pass rate: Not publicly disclosed. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

20%

Site Setup and Ground Conditions

Ground bearing pressure, outrigger mats, swing radius, power-line clearance per OSHA 1926.1408, exclusion zones, and pre-lift site evaluation.

30%

Crane Operations and Communication

Pre-shift and monthly inspection per OSHA 1926.1412, ASME B30.5 hand signals, lift sequence, critical lifts, personnel hoisting, and shutdown.

25%

Technical Knowledge and Components

Mobile crane variants (RT, AT, truck-mounted, crawler), wire rope inspection, LMI and Anti-Two-Block devices, limit switches, and OSHA/ASME rules.

25%

Load Chart Interpretation

Capacity tables by radius and boom length, deductions, parts of line, outrigger configuration, over-side vs over-rear charts, and de-rate scenarios.

Preparing for the NCCER Mobile Crane Exam

What You Need to Know

Passing score: Pass/fail (NCCER does not publish a current public numeric written cut score)
Assessment: Written assessment of approximately 100 questions plus a practical performance evaluation; both components are administered at NCCER-accredited assessment centers and meet OSHA 1926 Subpart CC operator-certification requirements
Time limit: Approximately 2 hours for the written portion
Exam / certification fees: Varies by NCCER-accredited assessment center Official sources

Using Our Practice Resources

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NCCER Mobile Crane: Suggested Study Strategy

1Memorize OSHA 1926.1408 power-line clearance distances. The 10-foot minimum at 0-50 kV grows with voltage and is a frequent exam target.

2Drill load chart reading until you can find capacity by radius, boom length, configuration, and over-side vs over-rear quadrant without hesitation.

3Know the difference between LMI (Load Moment Indicator, prevents overload) and ATB (Anti-Two-Block, prevents block-to-head contact). Both are required safety devices and questions test their distinct roles.

4Learn ASME B30.5 hand signals cold. The signal person is the only authority on movement except for an emergency stop, which anyone may call.

5Study ground bearing pressure as force divided by outrigger pad or mat area, then compare to soil bearing capacity to determine if mats are required.

6Understand wire rope retirement criteria from ASME B30.5: broken wires, abrasion, kinks, birdcaging, and reduction in diameter all matter.

7Treat critical lifts (over 75% capacity, personnel hoisting, multi-crane, over occupied areas) as a separate category with additional planning and documentation.

8Distinguish RT, AT, truck-mounted, and crawler cranes by mobility, ground pressure, and typical use cases. The exam tests when each is appropriate.

Frequently Asked Questions

Is NCCER Mobile Crane Operator certification the same as NCCCO?

No. NCCER and NCCCO are separate OSHA-accredited certifying bodies. Both meet 29 CFR 1926 Subpart CC operator-certification requirements, so an employer can accept either. NCCER focuses on the construction industry and pairs written and practical components at NCCER-accredited assessment centers.

How many questions are on the NCCER Mobile Crane Operator written exam?

The NCCER Mobile Crane Operator written assessment includes approximately 100 multiple-choice questions covering site setup, crane operations, technical knowledge, and load chart interpretation. The practical performance evaluation is a separate hands-on component.

What is the passing score for the NCCER mobile crane exam?

NCCER does not publish a public numeric cut score for the mobile crane operator written exam. Candidates receive pass/fail results from their NCCER-accredited assessment center.

How long is NCCER mobile crane certification valid?

NCCER Mobile Crane Operator certification is valid for five years, consistent with OSHA 29 CFR 1926.1427 operator-certification rules. Recertification requires meeting NCCER's renewal criteria including documented operating experience and reassessment.

Does NCCER certification meet OSHA crane operator requirements?

Yes. NCCER is an OSHA-accredited crane operator certifying body, so NCCER Mobile Crane Operator certification satisfies the operator-certification provisions of 29 CFR 1926 Subpart CC. Employers may accept either NCCER or NCCCO certification.

What standards should I study for the NCCER mobile crane exam in 2026?

Focus on current OSHA 29 CFR 1926 Subpart CC (especially 1926.1408 power lines, 1926.1412 inspections, 1926.1427 certification, and 1926.1431 personnel hoisting), and ASME B30.5 Mobile and Locomotive Cranes. NCCER load chart and signaling content aligns to these rules.

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