NCCCO Mobile Crane Certification Exam
ACTUAL EXAM 2026/2027 | Telescopic
Boom Mobile Crane | Verified Q&A | Pass
Guaranteed - A+ Graded
DOMAIN 1: Site Setup & Crane Configuration (20% of Exam Content)
Key Terminology & Definitions
Table
Term Definition Standard
Reference
Outrigger Extendable support device used to increase crane ASME B30.5-3.1.1
stability and lifting capacity
On Rubber Crane operation supported by tires without outriggers ASME B30.5-3.1.2
deployed
Center Pin Center of rotation for the crane superstructure ASME B30.5-3.1.3
Operating Radius Horizontal distance from center pin to center of ASME B30.5-3.1.4
vertical hoist line
Load Radius Horizontal distance from center pin to center of gravity ASME B30.5-3.1.5
of suspended load
Two-Blocking Condition when lower load block assembly contacts ASME B30.5-3.1.6
upper load block assembly or boom tip
,Term Definition Standard
Reference
Minimum Approach Minimum distance crane must maintain from OSHA 1926.1408
Distance (MAD) energized power lines Table A
Swing Radius Circular area covered by crane rotation ASME B30.5-3.1.7
Regulatory/Standard References
OSHA 1926 Subpart CC (Cranes & Derricks in Construction):
1926.1402: Ground conditions must be firm, drained, and graded
1926.1408: Minimum approach distances for power lines (Table A)
1926.1412: Inspections (frequent, monthly, annual)
1926.1427: Operator certification requirements
ASME B30.5 (Mobile & Locomotive Cranes):
B30.5-3.2.1: Crane must be level within 1% grade
B30.5-3.3.1: Outrigger pads required on unstable ground
B30.5-3.4.1: Swing radius barriers for personnel protection
Critical Site Setup Requirements
Ground Conditions (OSHA 1926.1402):
Ground must support crane and load without failure
Use of mats/cribbing required on soft or unstable ground
Slope must not exceed crane manufacturer's specifications
Drainage must prevent water accumulation
Crane Leveling (ASME B30.5-3.2.1):
Crane must be level within 1% grade (approximately 0.6 degrees)
Use built-in level indicators or precision instruments
, Level before extending boom or lifting loads
Re-check level after any ground settlement
Minimum Approach Distances – Table A (OSHA 1926.1408):
Table
Voltage (kV) Minimum Approach Distance
Up to 50 10 ft
50–200 15 ft
200–350 20 ft
350–500 25 ft
500–750 35 ft
750–1,000 45 ft
Note: These are minimum distances for qualified personnel. For unqualified personnel, distances are
greater. Always consult current OSHA Table A for exact values.
Swing Radius Protection (ASME B30.5-3.4.1):
Barriers required to prevent personnel from entering swing radius
Warning signs posted at all entry points
Dedicated spotter when personnel must enter swing radius
No personnel allowed under suspended loads
Practice Questions – Domain 1
Q1: A crane is being set up on a construction site with a 3% slope. According to ASME B30.5, what is the
required action?
ACTUAL EXAM 2026/2027 | Telescopic
Boom Mobile Crane | Verified Q&A | Pass
Guaranteed - A+ Graded
DOMAIN 1: Site Setup & Crane Configuration (20% of Exam Content)
Key Terminology & Definitions
Table
Term Definition Standard
Reference
Outrigger Extendable support device used to increase crane ASME B30.5-3.1.1
stability and lifting capacity
On Rubber Crane operation supported by tires without outriggers ASME B30.5-3.1.2
deployed
Center Pin Center of rotation for the crane superstructure ASME B30.5-3.1.3
Operating Radius Horizontal distance from center pin to center of ASME B30.5-3.1.4
vertical hoist line
Load Radius Horizontal distance from center pin to center of gravity ASME B30.5-3.1.5
of suspended load
Two-Blocking Condition when lower load block assembly contacts ASME B30.5-3.1.6
upper load block assembly or boom tip
,Term Definition Standard
Reference
Minimum Approach Minimum distance crane must maintain from OSHA 1926.1408
Distance (MAD) energized power lines Table A
Swing Radius Circular area covered by crane rotation ASME B30.5-3.1.7
Regulatory/Standard References
OSHA 1926 Subpart CC (Cranes & Derricks in Construction):
1926.1402: Ground conditions must be firm, drained, and graded
1926.1408: Minimum approach distances for power lines (Table A)
1926.1412: Inspections (frequent, monthly, annual)
1926.1427: Operator certification requirements
ASME B30.5 (Mobile & Locomotive Cranes):
B30.5-3.2.1: Crane must be level within 1% grade
B30.5-3.3.1: Outrigger pads required on unstable ground
B30.5-3.4.1: Swing radius barriers for personnel protection
Critical Site Setup Requirements
Ground Conditions (OSHA 1926.1402):
Ground must support crane and load without failure
Use of mats/cribbing required on soft or unstable ground
Slope must not exceed crane manufacturer's specifications
Drainage must prevent water accumulation
Crane Leveling (ASME B30.5-3.2.1):
Crane must be level within 1% grade (approximately 0.6 degrees)
Use built-in level indicators or precision instruments
, Level before extending boom or lifting loads
Re-check level after any ground settlement
Minimum Approach Distances – Table A (OSHA 1926.1408):
Table
Voltage (kV) Minimum Approach Distance
Up to 50 10 ft
50–200 15 ft
200–350 20 ft
350–500 25 ft
500–750 35 ft
750–1,000 45 ft
Note: These are minimum distances for qualified personnel. For unqualified personnel, distances are
greater. Always consult current OSHA Table A for exact values.
Swing Radius Protection (ASME B30.5-3.4.1):
Barriers required to prevent personnel from entering swing radius
Warning signs posted at all entry points
Dedicated spotter when personnel must enter swing radius
No personnel allowed under suspended loads
Practice Questions – Domain 1
Q1: A crane is being set up on a construction site with a 3% slope. According to ASME B30.5, what is the
required action?
