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 should be done with counterweights during assembly?
Answer: Install them in the sequence specified by the manufacturer, verifying weight and placement at each step
Counterweights must be installed in the exact sequence specified by the manufacturer. Incorrect sequencing can create imbalanced conditions, leading to tipping during the assembly process itself.
During disassembly, what is the general rule for the sequence of operations?
Answer: Reverse of the assembly sequence
Disassembly is generally performed in the reverse order of assembly. This ensures the crane remains stable at each step, just as it was during the original assembly process.
What must happen before any person goes under or between crane components during assembly?
Answer: The components must be properly supported with adequate blocking/cribbing so they cannot fall or shift
No one should position themselves under or between heavy components unless those components are securely supported by blocking or mechanical means. Hydraulic systems alone are not sufficient support.
What documentation should be maintained during crane assembly?
Answer: Records of torque values for critical bolts, pin installation verification, component serial numbers, and who performed each step
Assembly records create a quality trail: torque values, pin checks, component identification, inspection results, and personnel involved. These records are essential for incident investigation and maintenance tracking.
An assist crane is being used during assembly. What coordination is required?
Answer: A detailed lift plan for each pick, designated signal persons, load weights, and clear communication between both operators
Multi-crane operations require detailed planning: coordinated lift plans, clear communication protocols, designated signal persons for each crane, and a single person directing the overall operation.
What is the hazard of 'side pull' during boom assembly?
Answer: Side pull creates lateral forces the boom and crane are not designed for, potentially causing boom damage or crane tipping
During assembly, lifting boom sections at an angle creates side forces on the crane being assembled. This can damage boom connections, bend components, or cause the partially assembled crane to tip.