Which of the following is NOT required in the inspection bay?

In a Maryland State Inspection bay, specific equipment is essential for conducting thorough and compliant vehicle inspections. Among these, convex mirrors, a floor jack, and a tread depth gauge are all crucial tools that ensure the inspector can effectively evaluate a vehicle’s condition.

Convex mirrors enhance visibility in the bay, allowing inspectors to see areas of the vehicle that may otherwise be hard to inspect directly. A floor jack is necessary for lifting vehicles to inspect the undercarriage, brakes, and suspension components. The tread depth gauge is vital for assessing tire health, ensuring that tires meet legal standards for safety and performance.

In contrast, while machinery may refer to various types of equipment used across different maintenance and repair operations, it is not specifically required in an inspection bay. The term "machinery" is too broad and does not directly contribute to the essential tasks of performing a vehicle safety inspection. Therefore, it correctly stands out as not being a required item for the inspection procedure itself, highlighting its lack of direct relevance to the specific inspection needs established by Maryland regulations.