Which of the following would be acceptable for a speedometer during inspection?

For a speedometer to be acceptable during inspection, it must be functioning properly, which means it needs to register speed correctly. Accuracy is crucial for ensuring safe driving practices, as the speedometer provides essential feedback to the driver about their traveling speed. An inaccuracy could lead to violations of speed limits or unsafe driving conditions, emphasizing the importance of this particular requirement during a Maryland State Inspection.

While a cracked cover or using a similar model might seem somewhat acceptable at first glance, they do not meet the functional requirements that ensure safety and reliability. Additionally, an uncalibrated speedometer would be a significant concern, as it would not provide accurate readings, compromising the vehicle's compliance with state regulations and posing risks on the road. Hence, a correctly registering speedometer is the only viable option for compliance during an inspection.