Signals and Communication Standards 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 Signals and Communication Standards flashcards as text
Under what circumstances may a crane operator take direction from someone other than the designated signal person?
Answer: Only when receiving an emergency stop signal — in all other situations, signals come only from the designated signal person
The only signal a crane operator may accept from a non-designated person is a stop or emergency stop signal. All other motion signals must come only from the designated signal person.
What is the purpose of a 'pre-lift meeting' or 'tailgate safety briefing' before a crane lift?
Answer: It ensures all personnel involved in the lift share a common understanding of the lift plan, hazards, signals, and emergency procedures
Pre-lift meetings ensure that all members of the lift team — operator, signal person, riggers, and others — understand the lift plan, their roles, communication methods, hazards, and emergency procedures.
In a two-crane lift, how should signal communication be managed?
Answer: Two signal persons each direct one crane, but both signal persons coordinate with a designated lead signal person or lift director
In two-crane lifts, each crane may have its own signal person, but both signal persons must coordinate with a designated lead signal person or lift director who directs the overall operation to ensure synchronized movements.
What is the flag signal for 'emergency stop' in ASME B30.5?
Answer: Extend the arm horizontally with the flag pointed outward and move it rapidly back and forth
The ASME B30.5 emergency stop flag signal is to extend the arm horizontally with the flag and move it rapidly back and forth — essentially an emphatic version of the standard stop signal.
When radio communication is used for crane signaling, what must be confirmed before the lift begins?
Answer: The radio channel and call procedure must be pre-selected, tested, and confirmed working before any lift begins
Before using radio communication for crane signals, the specific channel, call procedure, and radio function must be tested and confirmed working to ensure continuous, reliable communication during the lift.
What does the ASME B30.5 signal 'multiple trolley, use main block' tell the operator to do?
Answer: Use the main (larger) hoist block rather than the auxiliary/whip line for the following motion command
The 'use main hoist' signal tells the crane operator to apply the following motion signal command to the main hoist/block rather than the auxiliary (whip) hoist.