Practice question

When uncoupling a loaded semi-trailer, why must the driver think carefully about the surface and landing-leg position?

Soft or uneven ground can allow the trailer legs to sink or the trailer to become unstable
The landing legs control the trailer's brake lights
A loaded trailer does not need its parking brake applied
The surface affects only the tractor unit, not the trailer

Answer: A — Soft or uneven ground can allow the trailer legs to sink or the trailer to become unstable

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