Which of the following is something to look for during a bus inspection?

Excessive smoke from the exhaust is an important indicator of potential engine problems during a bus inspection. Observing abnormal smoke can suggest issues such as incomplete combustion, oil burning, or other mechanical failures. Catching these signs early can prevent further damage to the vehicle and ensure that it operates safely and efficiently for transporting students.

Other factors mentioned, while relevant to overall bus operation and safety, do not necessarily fall under the specific category of monitoring mechanical integrity during an inspection. For instance, tire pressure is crucial for safe driving, but it pertains more to vehicle maintenance than immediate operational concerns during an inspection. Passengers boarding the bus and the condition of the bus stop area are essential for ensuring safety and logistical efficacy but do not directly impact the mechanical readiness of the bus itself at inspection time.