How to Check How Much Fuel is Left in the Fuel Gauge?
2 Answers
To check the fuel level in the fuel gauge: 1. When the needle is at the 'F' position, it indicates the tank is full; 2. When the needle approaches the 'E' position, it means the fuel level is decreasing and immediate refueling is required. The purpose of the fuel gauge is to indicate the amount of fuel stored in the car's fuel tank and to remind the driver to refuel in time. The working principle of the fuel gauge is: when the fuel tank is full, the resistance value of the variable resistor connected to the float decreases, causing the circuit current to reach a higher value, which positions the fuel gauge needle at a higher level; when the fuel level drops, the resistance value of the variable resistor increases accordingly, reducing the circuit current and causing the fuel gauge needle to lower as well.
As an experienced driver, I'd like to share how I check the fuel gauge in my daily routine. Usually after getting in the car and starting the engine, the fuel gauge appears on the dashboard near the tachometer or speedometer, marked with a gas pump icon. For analog gauges, check the needle position - pointing to 'F' means full tank, 'E' indicates empty, and the middle position suggests about half remaining. Digital displays show percentage or remaining mileage directly. I make it a habit to check fuel levels before every drive, especially for long trips, to avoid running out of gas midway. Related to this, the yellow fuel warning light or alert on the dashboard means you should refuel soon - you typically have tens of kilometers left, but don't delay too long. Developing this habit is practical because I once experienced breaking down on the highway when nearly out of fuel, which was time-consuming, laborious and dangerous. As a reminder, low fuel can cause unstable engine operation, affecting vehicle performance and safety. It's best to fill up before departure and maintain at least a quarter tank for peace of mind.
