Tower Crane Operator Test 1 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 Tower Crane Operator Test 1 flashcards as text
Which condition requires an immediate shutdown of a tower crane and notification of the competent person?
Answer: Discovery of a broken wire rope strand exceeding ASME B30.3 removal-from-service criteria
ASME B30.3 specifies broken wire criteria that, when met, require immediate removal from service until the rope is replaced.
What is the maximum allowable slope for a tower crane base when the manufacturer's specification states the crane must be level?
Answer: The manufacturer's tolerance, typically within 1/500 (0.2%) of plumb
Tower cranes must be installed to the manufacturer's plumb tolerance, which is typically within 1/500 of the mast height.
When performing a pick-and-carry operation with a tower crane, what is the most critical consideration?
Answer: Tower cranes are not designed for travel with a suspended load and must never pick-and-carry
Tower cranes are stationary structures and are never designed for pick-and-carry operations; they must remain fixed during all lifts.
A qualified rigger attaches a load using a single-leg wire rope sling at a 45-degree angle from vertical. How does this affect the sling's capacity compared to a vertical hitch?
Answer: Capacity is reduced because the sling experiences a higher tension than the load weight
At 45 degrees from vertical, the sling tension exceeds the load weight by approximately 41%, reducing its effective working load limit.
Under OSHA 29 CFR 1926.1431, what is the maximum number of workers permitted to be hoisted in a personnel platform (man basket) on a tower crane?
Answer: The number specified by the platform manufacturer not to exceed the platform's rated capacity
OSHA requires that occupancy not exceed the platform's rated capacity as specified by the manufacturer.
What action should a tower crane operator take if power is lost while a load is suspended?
Answer: Lower the load using the emergency power-off descent control if equipped, or wait for power restoration
Most tower cranes have spring-set brakes that hold the load on power loss; the operator should use the emergency lowering device if available and follow the site emergency plan.
Which NCCCO certification is specifically required to operate a tower crane on a US job site?
Answer: CCO Tower Crane Operator (TCO)
The NCCCO Tower Crane Operator (TCO) certification is the credential specifically required for tower crane operation.