Question

what should be confirmed before climbing on a scaffold?
only composite scaffolds are used when working near electricity lines
a competent person on the ground is holding on to the scaffold
the wheel brakes on the scaffold are locked in place
the path is clear for the scaffold to be rolled into location

Explanation:

Antes de subir a una andamienta, es esencial asegurar que los frenos de las ruedas estén bloqueados para evitar que se mueva accidentalmente y garantizar la estabilidad y seguridad del trabajador.

Answer:

the wheel brakes on the scaffold are locked in place