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Thermistor Type Fuel Level Sensor

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Questions and Answers

What happens to the resistance of a thermistor when the fuel level is low?

The resistance is low due to increased thermal conductivity of air.

The resistance remains constant regardless of fuel level.

The resistance is high because the thermistor is submerged in liquid.

The resistance is high because the thermistor is heated by air. (correct)

How does the thermal conductivity of fuel affect the thermistor's resistance?

Higher thermal conductivity of fuel raises the thermistor's resistance.

The thermal conductivity of fuel does not impact the thermistor's resistance.

Lower thermal conductivity of fuel increases the thermistor's temperature.

Higher thermal conductivity of fuel lowers the thermistor's resistance. (correct)

What role does air play in the thermistor's function for fuel level detection?

Air cools the thermistor, preventing overheating.

Air has no effect on the thermistor's resistance.

Air increases the fuel's thermal conductivity.

Air currents heat the thermistor, affecting its resistance. (correct)

What occurs when the fuel level rises in relation to the thermistor?

<p>The thermistor's resistance decreases due to lower temperature.</p> Signup and view all the answers

What is the primary principle behind how a thermistor detects fuel levels?

<p>It uses the differing thermal conductivity of air and fuel.</p> Signup and view all the answers

Study Notes

Thermistor Type Fuel Level Sensor

Thermistors are used in fuel level sensors to detect fuel levels.
Thermistor sensors exploit the difference in thermal conductivity between air and fuel.
Higher resistance in the thermistor indicates a low fuel level.
The thermistor is exposed to a stream of air when the fuel level is low.
This air stream heats the thermistor, increasing its resistance.
As fuel rises, it displaces the air stream.
Fuel has a higher thermal conductivity than air, causing the thermistor to cool down.
Reduced temperature leads to reduced resistance.

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Description

This quiz explores the functionality of thermistors in fuel level sensors. It covers how thermistors detect fuel levels by utilizing thermal conductivity differences between air and fuel, and how resistance changes relate to fuel levels. Test your understanding of this important sensor technology.