Service Truck Crane Operator 4 Flashcards
7 cards from real NCCCO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Service Truck Crane Operator 4 flashcards as text
What is a 'critical lift' as defined by NCCCO standards for service truck cranes?
Answer: A lift that exceeds 75% of the crane's rated capacity or involves unusual hazards requiring a written plan
Critical lifts typically involve loads exceeding 75% of rated capacity or unusual conditions, requiring a pre-lift plan and additional safety measures.
Which type of wire rope defect requires the rope to be removed from service immediately?
Answer: Six randomly distributed broken wires in one lay or three broken wires in one strand in a single lay
Per ASME B30.5 and OSHA standards, six randomly distributed broken wires in one lay or three in one strand requires immediate removal from service.
A service truck crane's rated capacity is reduced to 85% when operating on outriggers extended to mid-span. What does this reduction account for?
Answer: Reduced stability compared to fully extended outriggers
Partially extended outriggers provide less lateral stability than fully extended ones, so rated capacity is derated to maintain an adequate safety margin.
When using a service truck crane to make a tandem lift with two cranes, who is responsible for directing the combined lift?
Answer: A designated lead operator or lift director who coordinates both cranes
Tandem lifts require a designated lift director to coordinate both cranes simultaneously and prevent uneven load distribution or communication failures.
What hazard does 'two-blocking' create during a service truck crane operation?
Answer: The load block contacts the boom tip, causing wire rope failure or structural damage
Two-blocking occurs when the load block contacts the boom tip sheave, putting enormous stress on the wire rope that can cause sudden failure.
Which document must a service truck crane operator review to determine if a lift can be made near an excavation?
Answer: The crane load chart combined with a soil assessment and excavation proximity guidelines
Lifts near excavations require reviewing load charts alongside soil bearing capacity and proximity guidelines to prevent outrigger sinkage or ground collapse.
What is the recommended procedure when a service truck crane operator loses visual contact with the load during a lift?
Answer: Stop all crane movement immediately until a qualified signal person re-establishes contact
If the operator cannot see the load, all crane motion must stop immediately until a signal person or the operator re-establishes visual contact.