Mobile 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 Mobile Crane Operator Test 1 flashcards as text
A mobile crane's load chart shows a capacity of 40,000 lbs at a 30-foot radius with outriggers fully extended. If the operator must work at the same radius with outriggers retracted (on rubber tires), the operator should expect the capacity to:
Answer: Decrease significantly, often to 75% or less of the outrigger rating
On-rubber (tire) capacities are substantially lower than outrigger capacities because the crane's stability is greatly reduced without outriggers deployed.
Which document specifies the inspection intervals and criteria for wire rope used on a mobile crane?
Answer: ASME B30.5 and the wire rope manufacturer's specifications
ASME B30.5 and the wire rope manufacturer's documentation govern inspection frequencies and discard criteria for crane wire rope.
When should a crane operator perform a pre-operational inspection?
Answer: At the start of each shift before the crane is placed in service
OSHA 1926.1412 and ASME B30.5 require a qualified operator to perform a pre-shift inspection before each day or shift of crane use.
A signal person is required during crane operations whenever the operator:
Answer: Does not have a clear and direct view of the load or the load's path of travel
OSHA 1926.1419 requires a signal person whenever the operator's view of the load or path of travel is obstructed.
What is the maximum allowable out-of-level condition for most mobile crane setups according to manufacturer specifications?
Answer: 1 degree in any direction
Most crane manufacturers specify the crane must be within 1 degree of level (some specify less) for the load chart to be valid.
Which of the following wire rope conditions requires immediate removal from service?
Answer: Six or more broken wires in one rope lay or three or more broken wires in one strand
ASME B30.5 and OSHA 1926.1413 mandate removing wire rope with six or more broken wires per lay or three or more per strand.
During a tandem lift (two cranes lifting one load), who is responsible for directing the overall lift?
Answer: A qualified lift director or designated person must coordinate the entire operation
ASME B30.5 requires a qualified lift director to plan and coordinate all aspects of a tandem lift due to the increased complexity and risk.