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Which of these is true about overhead clearance?

  1. The weight of the cargo can change the height of the vehicle.

  2. Overhead clearance is the same regardless of the cargo

  3. Overhead clearance is only important for tall vehicles

  4. Overhead clearance does not affect the safety of the vehicle

The correct answer is: The weight of the cargo can change the height of the vehicle.

Cargo weight can greatly affect the overall height of a vehicle. As a result, the allowable clearance height may change depending on the weight of the cargo. This means that vehicles carrying heavy loads may have less overhead clearance than those without cargo. Option B is incorrect because as previously mentioned, cargo weight can affect the vehicle's height. Option C is not true because overhead clearance is important for all vehicles, regardless of height. Option D is incorrect because insufficient overhead clearance can lead to potential accidents or damage to the vehicle, making it a safety concern.