Mobile Crane Assembly and Disassembly Flashcards
6 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 6 Mobile Crane Assembly and Disassembly flashcards as text
What is the first step that must be completed before beginning mobile crane assembly?
Answer: Conduct a site survey and ground bearing capacity assessment
A thorough site survey including ground bearing capacity assessment must be completed first to ensure the ground can support the crane and outrigger loads.
When erecting a lattice boom crane, in what sequence should boom sections typically be assembled?
Answer: From butt section (base) upward toward the tip
Lattice boom assembly proceeds from the butt (base) section outward toward the tip, with each section connected and pinned before adding the next.
What must be verified after installing counterweights during mobile crane assembly?
Answer: That counterweight quantity and placement matches the load chart configuration being used
Counterweight configuration must exactly match the load chart being used, as different lift configurations require specific counterweight amounts and positions.
Which component should be inspected specifically for proper engagement before the crane is put into service after assembly?
Answer: All safety devices, limit switches, and anti-two-block systems
All safety devices including load moment indicators, anti-two-block systems, and limit switches must be tested and verified operational before placing the crane into service.
What is the purpose of the boom backstop or boom stop device on a mobile crane?
Answer: To prevent the boom from traveling past vertical and over-luffing backward
Boom backstops prevent the boom from exceeding maximum boom angle, which could cause it to tip backward (over-luffing), potentially causing catastrophic structural failure.
During mobile crane disassembly, when should the wire rope be removed from the boom?
Answer: After the boom is fully lowered and the last section is on the ground
Wire rope should be removed after the boom is fully lowered to a safe position and controlled, preventing uncontrolled rope movement during structural disassembly.