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 OSHA 1926.1419, when is a signal person required on a crane operation?
Answer: When the operator cannot see the load or path of travel clearly throughout the entire lift, or when working near power lines
OSHA 1926.1419(a) requires a signal person when the operator does not have a clear view of the load, the area it must travel, or the landing zone, or when working in proximity to power lines.
What signal standard must be used on a construction site where OSHA 1926 Subpart CC applies?
Answer: ASME B30.5 standard hand signals, radio communication, or direct voice communication — all parties must agree on the system before operations begin
OSHA 1926.1419 allows hand signals (using ASME B30.5 as reference), radio, or direct voice communication, but requires that the system be agreed upon by the operator and signal person before operations begin.
The ASME B30.5 hand signal for emergency stop uses which motion?
Answer: Both forearms crossed and re-crossed rapidly, indicating immediate cessation of all crane movement
The ASME B30.5 emergency stop signal uses both forearms crossed and repeatedly crossed in a rapid motion, indicating immediate cessation of all crane movement.
A signal person qualifies to direct crane operations under OSHA 1926.1428 only when they:
Answer: Are evaluated by a qualified evaluator and found to know the standard signals and have a basic understanding of crane operations and hazards
OSHA 1926.1428 requires signal persons to be qualified, meaning a qualified evaluator has assessed and confirmed their knowledge of the signal system, hand signals, and understanding of crane operations and relevant hazards.
During a pick, the signal person gives a 'lower boom' signal but the operator believes this will swing the load into a structure. What should the operator do?
Answer: Stop all motion, signal 'stop,' and communicate with the signal person to discuss the concern before proceeding
When the operator sees an imminent hazard, they should stop all motion and communicate the concern. The operator has the right and duty to refuse or pause any operation they believe is unsafe.
When radio communication is used between a signal person and a crane operator, what practice ensures safe command clarity?
Answer: The operator should repeat back each command to confirm understanding before executing the motion
Read-back (repeating the command back to the signal person) confirms correct reception and mutual understanding before crane motion begins, reducing miscommunication errors.