Crane Type Identification and Applications 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 Crane Type Identification and Applications flashcards as text
What type of crane is specifically designed to operate inside buildings, on floors, and in confined spaces where overhead clearance is limited?
Answer: Pick-and-carry or carry deck crane
Carry deck cranes are compact machines designed to travel with loads in confined spaces, often indoors, where their small footprint and low overall height allow operation where larger cranes cannot fit.
A luffing jib tower crane is preferred over a horizontal jib tower crane in certain urban construction situations. What is the main reason for choosing a luffing jib?
Answer: Luffing jibs can be raised to a near-vertical position to avoid oversailing into adjacent airspace or obstructions, which is critical on tight urban sites
A luffing jib can be raised steeply to prevent the jib from swinging over adjacent properties, streets, or airspace restrictions — a critical advantage on congested urban sites where oversailing is prohibited.
What is the primary operational difference between a fixed counterweight tower crane and a traveling counterweight tower crane?
Answer: In a fixed counterweight crane, the counterweight stays at a fixed radius; in a traveling counterweight crane, the counterweight moves to maintain balance as the trolley changes radius
In a traveling counterweight tower crane, the counterweight moves along the rear jib in the opposite direction to the trolley to maintain a balanced moment, allowing more consistent capacity across a wider range of radii.
What is the primary operational consideration that a floating crane faces that land-based cranes do not?
Answer: The crane's effective capacity is affected by vessel heel, trim, and roll due to wave action, which dynamically changes the working radius and stability margin
On a floating crane, wave-induced vessel motion (roll, pitch, heave) continuously changes the crane's trim, effective radius, and stability, requiring specialized load charts and operational limits based on sea state conditions.
Which of the following best describes a pedestal-mounted offshore crane and its primary application?
Answer: A permanently mounted crane on an offshore platform, drilling rig, or ship that handles deck cargo, supplies, equipment, and construction activities in the marine environment
Pedestal-mounted offshore cranes are permanent or semi-permanent cranes mounted on offshore structures for materials handling, personnel basket operations, and construction support in the marine environment.
What is the most significant operational difference between a hydraulic truck crane and a hydraulic rough terrain crane?
Answer: Hydraulic truck cranes travel on a carrier with multiple axles designed for highway use, while rough terrain cranes have a single cab, large pneumatic tires, and four-wheel drive optimized for soft ground conditions
The most significant difference is mobility: truck cranes use a highway-capable carrier (often with separate cab for transport) while rough terrain cranes have a single operator cab with large tires and 4WD for job site mobility on unpaved or soft surfaces.