Truck Model Familiarity: Truck Components: Suspension, Axles and Auxiliary Power

Build confidence with 5 original questions about Truck Model Familiarity: Truck Components: Suspension, Axles and Auxiliary Power. Review your answers and explanations after finishing.

Supplemental study practice. This is not a government licensing exam or ELDT certification, and does not replace hands-on training. Follow your state’s current handbook.

1 / 5

A mechanic refers to the load-supporting frame of a commercial motor vehicle, not including any added cargo equipment. What is the correct term for this part?

Trailer

Fifth wheel

Cab

Chassis

2 / 5

You are inspecting a truck and notice it uses air-filled rubber bags to support its load instead of steel springs. What is this suspension system called?

Leaf spring suspension

Torsion bar suspension

Air ride suspension

Hydraulic suspension

3 / 5

While checking truck safety features, you find a system with computers, sensors, and solenoid valves that monitor wheel speed and adjust braking force to prevent wheel lockup. What is this system called?

Electronic Stability Control

Anti-lock Braking System (ABS)

Hydraulic Brake Booster

Traction Control System

4 / 5

During a pre-trip inspection, you see a rod connecting the wheels on opposite sides of a truck and supporting the vehicle’s weight. What is this component called?

Driveshaft

Tie rod

Axle

Kingpin

5 / 5

You are assigned a truck equipped with a device that provides energy for functions other than moving the vehicle, such as powering a generator for driver comfort. What is this device called?

Inverter

Auxiliary Power Unit (APU)

Power Take Off (PTO)

Turbocharger

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