What types of fluids are checked during a vehicle inspection?

During a vehicle inspection, it is crucial to assess a variety of fluids to ensure the vehicle operates safely and efficiently. The correct answer includes engine oil, transmission fluid, brake fluid, and coolant, which are all essential for the vehicle's performance and safety.

Engine oil is vital for lubricating the moving parts of the engine, reducing friction and wear. Transmission fluid plays a key role in the smooth operation of the transmission, facilitating gear shifts and ensuring that the transmission system operates correctly. Brake fluid is critical for the braking system, as it transmits force from the brake pedal to the brake pads, allowing the vehicle to stop effectively. Coolant is necessary for regulating the engine temperature, preventing overheating, and ensuring that the engine operates within safe temperature limits.

The other options provided do not encompass the full range of fluids that are important for vehicle functionality. For example, focusing solely on engine oil and transmission fluid neglects the essential roles of brake fluid and coolant in vehicle safety and performance. While windshield washer fluid, mentioned in another option, is important for visibility, it is not critical for the fundamental operation of the vehicle. By evaluating all listed fluids, inspectors ensure that the vehicle is not only functional but also safe for operation on the road.