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When coupling and preparing a semi-trailer for highway transit, raising the landing gear just enough to clear flat pavement is sufficient, as full retraction is only necessary when traveling across unpaved terrain.

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False
The statement is false because commercial drivers must always fully raise the trailer landing gear and stow the crank handle before traveling. Even on paved highways, vehicles encounter railroad crossings, drainage dips, high pavement crowns, and changes in road grade where partially raised landing gear can catch, causing severe undercarriage damage or stranding the combination vehicle.

Adım Adım Çözüm

1
Analyze the ground clearance requirements under commercial semi-trailers during transit.
Trailers regularly encounter vertical roadway irregularities including humped railroad crossings, drainage swales, curbs, and bridge transitions.
Sufficient static clearance on flat pavement does not protect against dynamic dips and uneven roadway profiles.
2
Evaluate the mandatory procedure for trailer landing gear position before moving the vehicle.
The landing gear must be cranked all the way up until fully retracted, and the crank handle must be locked in its bracket.
Leaving landing gear even slightly extended drastically reduces space below, creating a severe hazard of catching on road irregularities or railroad tracks.

Anahtar Kavram

Maintaining adequate clearance underneath by fully retracting trailer landing gear to prevent undercarriage hang-ups and strikes on road surface irregularities.
Tahmini Süre:45s
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