Exam Questions - Exam ( / ) – Questions and 100% Correct Verified

1 NCCCO Mobile Crane Actual Exam ( / ) – Questions and 100% Correct Verified Answers | Grade A

Safety

• What should an operator do if the crane’s load line contacts an energized power line

with no immediate danger like fire?

• Jump from the cab, feet together
• Stay in the cab until lines are de-energized
• Climb down carefully from the crane
• Move the crane away from the line

Correct Answer: B. Stay in the cab until lines are de-energized

Rationale: Staying in the cab prevents electrical injury until the power line is de- energized, per OSHA 1926.1408. Leaving the cab or moving the crane risks electrocution.

• What is the minimum distance a crane must maintain from power lines rated below

50 kV?

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

Correct Answer: B. 10 feet

Rationale: OSHA 1926.1408 requires a minimum 10-foot clearance for power lines

under 50 kV to prevent electrical hazards.

• When is it permissible for a person to ride the headache ball?
• During light loads
• Never
• With supervisor approval
• For short distances

Correct Answer: B. Never

Rationale: Federal regulations (OSHA 1926.1431) prohibit riding the headache ball under all circumstances due to safety risks.

• What is the best procedure if underground utilities are present at the crane setup

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• Proceed with setup as planned
• Contact the utility company
• Use smaller outrigger pads
• Avoid using outriggers

Correct Answer: B. Contact the utility company

Rationale: Contacting the utility company ensures underground hazards are identified and marked, per OSHA 1926.1402, preventing accidents.

• Who should an operator respond to when receiving a “stop” signal?
• Appointed signal person only
• Project manager only
• Anyone
• Superintendent only

Correct Answer: C. Anyone

Rationale: OSHA 1926.1417 requires operators to obey a stop signal from anyone to ensure immediate safety.

• What is the wind speed limit for ceasing hoisting operations unless specified

otherwise by the manufacturer?

• 20 mph
• 25 mph
• 30 mph
• 35 mph

Correct Answer: C. 30 mph

Rationale: ASME B30.5 recommends ceasing hoisting at wind speeds of 30 mph unless manufacturer guidelines allow otherwise, due to stability risks.

• What is the primary concern if a crane experiences side loading during a lift?
• Load swinging
• Boom damage
• Hydraulic failure
• Outrigger collapse

Correct Answer: B. Boom damage

Rationale: Side loading stresses the boom, risking structural failure, per ASME B30.5.Other issues may occur but are secondary.

• What must be ensured before operating a crane near a trench?
• Outriggers are fully retracted
• Ground stability is assessed
• Load is reduced by 50%
• Crane is operated at maximum radius

Correct Answer: B. Ground stability is assessed

Rationale: Assessing ground stability prevents crane tip-over near trenches, per OSHA

1926.1402. Other actions are incorrect or unsafe.

• What should be done with materials placed under overhead energized power lines?
• Lifted with extra care
• Dragged out
• Not lifted by crane
• Lifted as normal

Correct Answer: C. Not lifted by crane

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