Tower Crane Operator 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 Tower Crane Operator flashcards as text
What is unique about a tower crane operator's daily climb to the cab?
Answer: Many tower cranes require the operator to climb a ladder inside the tower — potentially hundreds of feet — making physical fitness essential
While some modern tower cranes have personnel hoists, many require the operator to climb internal ladders to reach the cab. This can be several hundred feet, requiring good physical condition.
How does a tower crane operator determine wind speed at operating height?
Answer: Using an anemometer mounted at or near the jib level of the crane
Tower cranes have anemometers mounted at elevation to measure actual wind speed at operating height, which is typically much higher than ground-level wind speed.
What must the tower crane operator do during a lightning storm?
Answer: Cease operations, secure the crane (free-slewing if designed for it), and evacuate the cab to a safe location at ground level
Tower cranes are the tallest structures on site and attract lightning. Operations must stop, the crane may need to be set for free-slewing (weathervaning), and the operator must descend to ground level.
What is 'trolleying' on a tower crane?
Answer: Moving the trolley along the jib to change the operating radius and load position
Trolleying moves the hook trolley along the jib (horizontal boom), changing the operating radius. Moving the trolley outward increases radius (reducing capacity); inward decreases radius (increasing capacity).
What is 'free-slewing' and when is it used?
Answer: When the crane's upper structure is allowed to rotate freely with the wind, typically during high winds when the crane is not in operation
Free-slewing allows the crane to weathervane (rotate like a weather vane) with the wind, reducing wind loads on the structure. It's engaged during storms and when the crane is out of service in high winds.
How is communication managed between a tower crane operator and ground crew on a large job site?
Answer: Dedicated radio channel, designated signal persons, and potentially camera systems for blind spots
Tower crane operators use dedicated radio channels, rely on designated signal persons for blind spots, and may use camera systems. Clear communication protocols are essential given the operator's distance from the work area.