Truck Model Familiarity: Truck Suspension, Equipment, and Configuration Terms

A base plate is the license plate issued by the state in which the commercial vehicle is registered.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

An Electronic Logging Device (ELD) is used to electronically track drive time, speed, and mileage in commercial trucks.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

Dual axles refer to two axles, usually on the rear, that are closely spaced together.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

An Auxiliary Power Unit (APU) provides energy for functions other than propulsion, such as powering a generator for comfort.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

Bulk carriers are designed to transport loose, unpackaged materials such as gravel or scrap metal.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

When a tractor is operating without a trailer, it is referred to as 'bobtail.'

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

A backhaul is a load that returns the driver to their place of origin.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

A combination refers to at least one tractor and one trailer connected together.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

The Anti-lock Braking System (ABS) uses computers and sensors to prevent wheel lockup and help maintain control during braking.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

Air ride suspension uses air-filled rubber bags to support the load, providing a smoother ride compared to steel springs.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.