Question

Technician A days that a positive crankcase ventilation (pvc) system reduces vehicle emissions. Tech B says that a pvc system helps increase crankcase pressure. Who is correct?

Answer 1

Technician A is correct; the PCV system reduces vehicle emissions by redirecting vapors from the crankcase into the engine. Technician B is incorrect; the PCV system relieves, not increases, crankcase pressure. This, among other technologies, contributes to greener transportation.

Step-by-step explanation:

The question at hand deals with the function of a positive crankcase ventilation (PCV) system in a vehicle's engine. Technician A is correct: a PCV system is designed to reduce vehicle emissions by redirecting unburned fuel and gas vapors from the crankcase into the engine's intake system, where they can be combusted instead of released directly into the atmosphere.

Technician B, however, is not correct; the PCV system does not increase crankcase pressure, but rather relieves it. An increase in crankcase pressure is undesirable as it can cause oil leaks or other mechanical issues.

Together with other technologies such as catalytic converters, diesel filters, and alternative vehicle technologies like electric vehicles and fuel cells, the PCV system contributes to a more environmentally friendly and efficient transportation system by reducing pollutants like hydrocarbons, nitrogen oxides, and particulate matter.