NCCCO Signals and Communication Standards

Question 1

Under OSHA 1926.1419, when is a signal person required on a crane operation?

Accepted Answer

When the operator cannot see the load or path of travel clearly throughout the entire lift, or when working near power lines

Answer

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.

Question 2

What signal standard must be used on a construction site where OSHA 1926 Subpart CC applies?

Accepted Answer

ASME B30.5 standard hand signals, radio communication, or direct voice communication — all parties must agree on the system before operations begin

Answer

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.

Question 3

The ASME B30.5 hand signal for emergency stop uses which motion?

Accepted Answer

Both forearms crossed and re-crossed rapidly, indicating immediate cessation of all crane movement

Answer

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.

Question 4

A signal person qualifies to direct crane operations under OSHA 1926.1428 only when they:

Accepted Answer

Are evaluated by a qualified evaluator and found to know the standard signals and have a basic understanding of crane operations and hazards

Answer

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.

Question 5

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?

Accepted Answer

Stop all motion, signal 'stop,' and communicate with the signal person to discuss the concern before proceeding

Answer

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.

NCCCO (National Commission for the Certification of Crane Operators) Practice Test

NCCCO (National Commission for the Certification of Crane Operators) Practice Test

NCCCO Signals and Communication Standards