What type of fluid checks are part of the inspection?

The correct answer includes engine oil, transmission fluid, and brake fluid levels, all of which are critical components for vehicle safety and performance.

Engine oil is vital for lubricating the engine's moving parts, reducing friction, and preventing overheating. During an inspection, checking the engine oil level ensures that the engine can operate efficiently without risk of damage due to inadequate lubrication.

Transmission fluid plays a crucial role in ensuring smooth shifting and proper operation of the transmission system. Inspecting the transmission fluid level is essential to avoid issues with gear shifting and potential transmission failure, which can be costly to repair.

Brake fluid is critical for the safe operation of a vehicle's braking system, as it transfers the force applied to the brake pedal to the brakes themselves. Any deficiency in brake fluid can lead to brake failure, hence checking its level is a vital safety measure.

While other choices contain valid fluids that may be important in various contexts, they do not align specifically with the standard focus areas of a Pennsylvania state vehicle inspection. For instance, coolant and washer fluid are significant for vehicle maintenance but are generally not mandated checks in the state inspection process.