COMPREHENSIVE CERTIFICATION EXAMINATION | 200 VERIFIED QUESTIONS & RATIONALES | NEWEST EXAM 2026/2027
NCCCO CORE
CRANE OPERATOR CERTIFICATION
NATIONAL COMMISSION 2026/2027
200 QUESTIONS NCCCO CORE RATIONALES 2026/2027 NEWEST
, EXAM COVERAGE AREAS
Domain 1: Site, Setup & Safety OSHA 1926 Subpart CC
• OSHA 1926 Subpart CC crane standard
• Site conditions power lines 20ft rule Table A
• Ground conditions leveling cribbing
• Assembly disassembly
Domain 2: Operations, Load Charts & Rigging
• Load charts capacity deductions
• Quadrants over side front
• Rigging slings angles D/d
• Load weight CG
Domain 3: Wire Rope, Signals & Inspections
• Wire rope construction inspection removal criteria
• Signals hand voice
• Inspections shift monthly annual
• Maintenance
Domain 4: Cranes, Stability & Hazards
• Crane types mobile tower
• Stability tipping leverage
• Hazards power lines wind
• Personnel hoisting
NCCCO Core 2026/2027 Comprehensive 200 Questions Page 2
, QUESTION 1: OSHA 1926 power line minimum clearance up to 350kV?
A) 20 feet, over 350kV 50ft, Table A option
B) 10 ft
C) 5 ft
D) No clearance
CORRECT ANSWER: A) 20 feet, over 350kV 50ft, Table A option
RATIONALE: OSHA 1926.1408 power line safety up to 350kV 20ft minimum clearance, 350-1000kV 50ft,
Table A allows 10ft up to 50kV if de-energized confirmed etc. Option 1 de-energize ground, Option 2 20ft,
Option 3 Table A. Dedicated spotter.
QUESTION 2: Load chart deductions include?
A) Weight of load handling devices sling spreader headache ball deducted from gross to get net
B) No deductions
C) Only sling
D) Only ball
CORRECT ANSWER: A) Weight of load handling devices sling spreader headache ball
deducted from gross to get net
RATIONALE: Load charts: gross capacity minus deductions weight of load handling devices headache ball
block sling spreader etc to get net capacity. Quadrants over side vs over front vs 360. Level on outriggers
fully extended. Radius boom length.
QUESTION 3: Wire rope removal criteria broken wires?
A) 6 randomly broken wires in 6 rope diameters or 3 broken in one strand in 6 diameters
B) No criteria
C) Only 10 wires
D) Only 1 wire
CORRECT ANSWER: A) 6 randomly broken wires in 6 rope diameters or 3 broken in
one strand in 6 diameters
RATIONALE: Wire rope: construction 6x19 etc, removal criteria 6 random broken wires in 6 rope diameters
or 3 broken wires in one strand in 6 diameters, wear 1/3 diameter, kinking crushing bird caging, corrosion.
D/d ratio sheave diameter to rope 18-26:1. Inspection shift daily.
QUESTION 4: Crane leveling and ground conditions requirement?
A) Must be level within 1% grade, ground firm drained adequate support cribbing mats
B) No leveling
C) Only level not ground
D) Only ground
CORRECT ANSWER: A) Must be level within 1% grade, ground firm drained adequate
support cribbing mats
RATIONALE: Setup: ground conditions firm drained, use mats cribbing blocking, level within 1%
manufacturer spec typically 1 degree. Outriggers fully extended floats. Power lines wind. Assembly
disassembly director qualified rigger. 3% side load limit.
NCCCO Core 2026/2027 Comprehensive 200 Questions Page 3
, QUESTION 5: Hand signal for emergency stop?
A) Both arms extended palms down move arms back and forth horizontally
B) One arm
C) No signal
D) Only voice
CORRECT ANSWER: A) Both arms extended palms down move arms back and forth
horizontally
RATIONALE: Signals: ASME B30.5 hand signals emergency stop both arms extended palms down move
back forth horizontally, stop one arm extended palm down move back forth, boom up down etc. Voice
signals radio, signal person qualified. Operations must stop if contact power line.
QUESTION 6: OSHA 1926 power line minimum clearance up to 350kV?
A) 20 feet, over 350kV 50ft, Table A option
B) 10 ft
C) 5 ft
D) No clearance
CORRECT ANSWER: A) 20 feet, over 350kV 50ft, Table A option
RATIONALE: OSHA 1926.1408 power line safety up to 350kV 20ft minimum clearance, 350-1000kV 50ft,
Table A allows 10ft up to 50kV if de-energized confirmed etc. Option 1 de-energize ground, Option 2 20ft,
Option 3 Table A. Dedicated spotter.
QUESTION 7: Load chart deductions include?
A) Weight of load handling devices sling spreader headache ball deducted from gross to get net
B) No deductions
C) Only sling
D) Only ball
CORRECT ANSWER: A) Weight of load handling devices sling spreader headache ball
deducted from gross to get net
RATIONALE: Load charts: gross capacity minus deductions weight of load handling devices headache ball
block sling spreader etc to get net capacity. Quadrants over side vs over front vs 360. Level on outriggers
fully extended. Radius boom length.
QUESTION 8: Wire rope removal criteria broken wires?
A) 6 randomly broken wires in 6 rope diameters or 3 broken in one strand in 6 diameters
B) No criteria
C) Only 10 wires
D) Only 1 wire
CORRECT ANSWER: A) 6 randomly broken wires in 6 rope diameters or 3 broken in
one strand in 6 diameters
RATIONALE: Wire rope: construction 6x19 etc, removal criteria 6 random broken wires in 6 rope diameters
or 3 broken wires in one strand in 6 diameters, wear 1/3 diameter, kinking crushing bird caging, corrosion.
D/d ratio sheave diameter to rope 18-26:1. Inspection shift daily.
NCCCO Core 2026/2027 Comprehensive 200 Questions Page 4
NCCCO CORE
CRANE OPERATOR CERTIFICATION
NATIONAL COMMISSION 2026/2027
200 QUESTIONS NCCCO CORE RATIONALES 2026/2027 NEWEST
, EXAM COVERAGE AREAS
Domain 1: Site, Setup & Safety OSHA 1926 Subpart CC
• OSHA 1926 Subpart CC crane standard
• Site conditions power lines 20ft rule Table A
• Ground conditions leveling cribbing
• Assembly disassembly
Domain 2: Operations, Load Charts & Rigging
• Load charts capacity deductions
• Quadrants over side front
• Rigging slings angles D/d
• Load weight CG
Domain 3: Wire Rope, Signals & Inspections
• Wire rope construction inspection removal criteria
• Signals hand voice
• Inspections shift monthly annual
• Maintenance
Domain 4: Cranes, Stability & Hazards
• Crane types mobile tower
• Stability tipping leverage
• Hazards power lines wind
• Personnel hoisting
NCCCO Core 2026/2027 Comprehensive 200 Questions Page 2
, QUESTION 1: OSHA 1926 power line minimum clearance up to 350kV?
A) 20 feet, over 350kV 50ft, Table A option
B) 10 ft
C) 5 ft
D) No clearance
CORRECT ANSWER: A) 20 feet, over 350kV 50ft, Table A option
RATIONALE: OSHA 1926.1408 power line safety up to 350kV 20ft minimum clearance, 350-1000kV 50ft,
Table A allows 10ft up to 50kV if de-energized confirmed etc. Option 1 de-energize ground, Option 2 20ft,
Option 3 Table A. Dedicated spotter.
QUESTION 2: Load chart deductions include?
A) Weight of load handling devices sling spreader headache ball deducted from gross to get net
B) No deductions
C) Only sling
D) Only ball
CORRECT ANSWER: A) Weight of load handling devices sling spreader headache ball
deducted from gross to get net
RATIONALE: Load charts: gross capacity minus deductions weight of load handling devices headache ball
block sling spreader etc to get net capacity. Quadrants over side vs over front vs 360. Level on outriggers
fully extended. Radius boom length.
QUESTION 3: Wire rope removal criteria broken wires?
A) 6 randomly broken wires in 6 rope diameters or 3 broken in one strand in 6 diameters
B) No criteria
C) Only 10 wires
D) Only 1 wire
CORRECT ANSWER: A) 6 randomly broken wires in 6 rope diameters or 3 broken in
one strand in 6 diameters
RATIONALE: Wire rope: construction 6x19 etc, removal criteria 6 random broken wires in 6 rope diameters
or 3 broken wires in one strand in 6 diameters, wear 1/3 diameter, kinking crushing bird caging, corrosion.
D/d ratio sheave diameter to rope 18-26:1. Inspection shift daily.
QUESTION 4: Crane leveling and ground conditions requirement?
A) Must be level within 1% grade, ground firm drained adequate support cribbing mats
B) No leveling
C) Only level not ground
D) Only ground
CORRECT ANSWER: A) Must be level within 1% grade, ground firm drained adequate
support cribbing mats
RATIONALE: Setup: ground conditions firm drained, use mats cribbing blocking, level within 1%
manufacturer spec typically 1 degree. Outriggers fully extended floats. Power lines wind. Assembly
disassembly director qualified rigger. 3% side load limit.
NCCCO Core 2026/2027 Comprehensive 200 Questions Page 3
, QUESTION 5: Hand signal for emergency stop?
A) Both arms extended palms down move arms back and forth horizontally
B) One arm
C) No signal
D) Only voice
CORRECT ANSWER: A) Both arms extended palms down move arms back and forth
horizontally
RATIONALE: Signals: ASME B30.5 hand signals emergency stop both arms extended palms down move
back forth horizontally, stop one arm extended palm down move back forth, boom up down etc. Voice
signals radio, signal person qualified. Operations must stop if contact power line.
QUESTION 6: OSHA 1926 power line minimum clearance up to 350kV?
A) 20 feet, over 350kV 50ft, Table A option
B) 10 ft
C) 5 ft
D) No clearance
CORRECT ANSWER: A) 20 feet, over 350kV 50ft, Table A option
RATIONALE: OSHA 1926.1408 power line safety up to 350kV 20ft minimum clearance, 350-1000kV 50ft,
Table A allows 10ft up to 50kV if de-energized confirmed etc. Option 1 de-energize ground, Option 2 20ft,
Option 3 Table A. Dedicated spotter.
QUESTION 7: Load chart deductions include?
A) Weight of load handling devices sling spreader headache ball deducted from gross to get net
B) No deductions
C) Only sling
D) Only ball
CORRECT ANSWER: A) Weight of load handling devices sling spreader headache ball
deducted from gross to get net
RATIONALE: Load charts: gross capacity minus deductions weight of load handling devices headache ball
block sling spreader etc to get net capacity. Quadrants over side vs over front vs 360. Level on outriggers
fully extended. Radius boom length.
QUESTION 8: Wire rope removal criteria broken wires?
A) 6 randomly broken wires in 6 rope diameters or 3 broken in one strand in 6 diameters
B) No criteria
C) Only 10 wires
D) Only 1 wire
CORRECT ANSWER: A) 6 randomly broken wires in 6 rope diameters or 3 broken in
one strand in 6 diameters
RATIONALE: Wire rope: construction 6x19 etc, removal criteria 6 random broken wires in 6 rope diameters
or 3 broken wires in one strand in 6 diameters, wear 1/3 diameter, kinking crushing bird caging, corrosion.
D/d ratio sheave diameter to rope 18-26:1. Inspection shift daily.
NCCCO Core 2026/2027 Comprehensive 200 Questions Page 4
