Final answer:
The false statement is 'd. A tire out of balance statically can cause a tramp-type vibration' as a statically unbalanced tire typically causes a vertical hopping motion rather than a tramp-type vibration.
Step-by-step explanation:
The student has asked which statement is false regarding vehicle vibrations caused by issues with tires and wheels. Here is a breakdown of each statement:
- Excessive radial runout can cause a tramp-type vibration as this refers to the amount of up and down movement a wheel may have as it rotates.
- Excessive lateral runout can indeed cause a tramp-type vibration; lateral runout refers to the side-to-side movement, which can result in an uneven ride.
- A tire that is out of balance dynamically can cause a shimmy-type vibration. Dynamic balance refers to the balance across the whole tire and wheel assembly.
- A tire that is out of balance statically typically causes a hopping motion, not a tramp-type vibration. Statically out-of-balance tires have more weight in a particular area, causing a vertical movement.
Therefore, the answer is d. A tire out of balance statically can cause a tramp-type vibration, as this statement is false.