What is necessary for the valve stems to pass inspection?

Answer: B — Both valve stems must have caps and be leak-free

For valve stems to pass inspection, it is essential that both valve stems are equipped with caps and are leak-free. This ensures not only the proper inflation of the tires, contributing to vehicle safety and performance but also protects the inner mechanisms from dirt and moisture that could cause damage or malfunctions. Having caps prevents the loss of air pressure due to leaks and assures that the valve stems remain functional and secure throughout the operation of the vehicle. Proper maintenance of both valve stems is crucial for the overall reliability of the tire system, and this is why both need to meet these criteria during an inspection.