NCCER Crane Site Operations & Hazard Recognition 4 — Questions and Answers
Question 1: A crane operator notices hydraulic fluid leaking from the boom cylinder during a lift. What should the operator do first?
- Finish the current lift quickly before stopping
- Lower the load to the ground immediately and shut down the crane (Correct answer)
- Add fluid and continue monitoring the leak
- Boom up to relieve cylinder pressure
Correct answer: Lower the load to the ground immediately and shut down the crane
A hydraulic leak can cause sudden loss of boom support, so the load must be lowered and the crane taken out of service immediately.
Question 2: Which document must the crane operator have access to at all times during operation?
- The company's safety manual
- The crane's load chart and manufacturer's operating manual (Correct answer)
- The job site safety plan
- The rigging crew's certification cards
Correct answer: The crane's load chart and manufacturer's operating manual
OSHA and ASME B30.5 require the load chart and operator's manual to be available in the cab for reference during all operations.
Question 3: What effect does operating with the outriggers only partially extended have on the crane's rated capacity?
- Capacity is unaffected as long as the load is centered
- Capacity is significantly reduced compared to fully extended outrigger configuration (Correct answer)
- Capacity is increased because the footprint is narrower
- Capacity remains at 85% regardless of extension amount
Correct answer: Capacity is significantly reduced compared to fully extended outrigger configuration
Partial outrigger extension reduces the tipping fulcrum and dramatically lowers rated capacities as specified in the crane's load chart.
Question 4: Which crane hand signal is used to indicate 'emergency stop'?
- Fist held stationary at shoulder height
- Both arms extended outward, waving rapidly up and down (Correct answer)
- Arm extended, fist closed, and moving rapidly in a circular motion
- One arm raised vertically with palm open
Correct answer: Both arms extended outward, waving rapidly up and down
The emergency stop signal uses both arms waved rapidly to command the operator to stop all motion immediately.
Question 5: What is the hazard associated with exceeding the crane's rated capacity by even a small margin?
- Increased wear on hoist ropes only
- Structural overload that can cause sudden, catastrophic crane failure (Correct answer)
- Slightly reduced fuel efficiency
- Minor tipping that self-corrects
Correct answer: Structural overload that can cause sudden, catastrophic crane failure
Load charts already include safety factors; exceeding rated capacity removes those margins and can cause immediate structural failure or tipping.
Question 6: Before beginning a critical lift, which personnel must be involved in the pre-lift meeting?
- Only the crane operator and site superintendent
- The crane operator, rigger, signalperson, and lift supervisor at minimum (Correct answer)
- The crane operator and safety officer only
- All site workers must attend regardless of role
Correct answer: The crane operator, rigger, signalperson, and lift supervisor at minimum
A critical lift plan requires all key personnel involved in the lift to participate in the pre-lift meeting to review the plan and hazards.
Question 7: What should a crane operator do if they lose communication with the signalperson during a lift?
- Continue the lift at reduced speed
- Stop all movement immediately and wait to re-establish communication (Correct answer)
- Lower the load slowly while watching for signals
- Use horn signals to communicate with the crew
Correct answer: Stop all movement immediately and wait to re-establish communication
Loss of communication is a stop-work condition; all crane movement must cease until reliable communication is restored.
NCCER Crane Site Operations & Hazard Recognition 4
A crane operator notices hydraulic fluid leaking from the boom cylinder during a lift.
What should the operator do first?