What hazard is controlled when the metal nozzle of a gasoline dispenser is in contact with the vehicle's metal filler neck?

• A. Pressure
• B. Vibration
• C. Static
• D. Temperature

Answer: (C)

When the metal nozzle of a gasoline dispenser is in contact with the vehicle's metal filler neck, the hazard that is primarily controlled is static electricity. Gasoline is a highly flammable liquid, and the transfer process can generate static charge due to the movement of fuel through the nozzle and into the filler neck.

Metal components, such as the nozzle and the filler neck, provide a conductive path that allows any built-up static electricity to dissipate safely. This grounding effect minimizes the risk of a static spark igniting the gasoline vapor, which can be extremely dangerous. Static control is essential during fueling operations to prevent explosions or fires that could result from static discharge.

In contrast, pressure, vibration, and temperature do not play a significant role in this specific interaction between the dispenser and vehicle. Static is the primary concern addressed by the contact of these metal parts during refueling.