High School

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Fuel lines supply fuel to the throttle body or fuel rail and return excess fuel and vapors to the tank. Which best describes fuel and vapor lines?

A. Copper or aluminum tubing
B. Seamed steel tubing
C. PVC
D. Rigid or flexible

Answer :

Answer: B. Seamed steel tubing

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Rewritten by : Barada

Final answer:

Fuel and vapor lines in a vehicle's fuel delivery system are best described as being either rigid or flexible to accommodate the pressures, corrosiveness, and heat of the engine while withstanding movement and vibration.

Explanation:

Fuel and vapor lines are critical components of a vehicle's fuel delivery system. The best description for the material used for these lines is D. Rigid or flexible. This describes the nature of the material rather than the specific material itself. Fuel lines can be made from different materials, including metal such as aluminum or steel, and some types can be made from reinforced rubber or specialized plastic like PVC. The key is that they should be durable enough to handle the pressure and corrosive nature of fuel and resistant to the heat produced by the engine. Moreover, they need to be flexible enough to accommodate movement and vibration without breaking. Fuel lines supply fuel to the throttle body or fuel rail and return excess fuel and vapors to the tank. The best description for fuel and vapor lines is Rigid or flexible. Fuel lines can be made of materials like nylon, rubber, or stainless steel. They are designed to withstand high pressure and chemical resistance.