Question

Which of the following is the most possible cause of a vibrating truck as it goes down the freeway?

A)when the load is 20% heavier on one side. when the load is 25% heavier than the law allows.
B)when there is a loose connection between the motor and the shaft that drives the wheels.
C)when the tires are inflated to only 80% of the manufacturer's recommended amount.
D)when the truck is driven 30 miles per hour over the lawful limit.

Answer 1

The most probable cause for a vibrating truck on the freeway is a loose connection between the motor and shaft driving the wheels, as it directly impacts power transmission and wheel movement.

Step-by-step explanation:

A vibrating truck on the freeway can be caused by various issues. These issues can involve imbalanced loads, a loose connection in the vehicle's drivetrain, incorrect tire pressure, or excessive speed. However, the most likely cause of a vibration is option B) when there is a loose connection between the motor and the shaft that drives the wheels. This type of mechanical issue can result in significant vibrations as it directly affects how the power is transmitted to the wheels, and any looseness can cause irregular motion and hence, vibrations. Options A, C, and D can also cause vibrations, but they are less direct. For example, an imbalanced load (option A) may lead to uneven weight distribution affecting the vehicle's balance, but not necessarily cause immediate vibration. Similarly, driving the truck over the speed limit (option D) can lead to various risks, including vibrations, due to aerodynamic and mechanical reasons, but it is not inherently linked to the direct cause of a vibration.