High School

Why should a boat's gas tank never be completely filled?

A. Gas needs room to expand inside the tank.
B. The reading on the fuel gauge will be inaccurate.
C. To avoid going over the boat's load capacity.
D. To minimize the use of the ventilation system.

Answer :

Final answer:

A boat's gas tank should never be completely filled to allow for gasoline expansion, which can lead to overflow or tank damage. It also helps maintain accurate fuel gauge readings and ensures safety. Leaving space in the tank is essential for maintaining the integrity of the fuel system.


Explanation:

Why a Boat's Gas Tank Should Not Be Completely Filled

When filling a boat's gas tank, it is important to leave some space, as gasoline expands when it heats up. If a tank is completely filled, this expansion can lead to dangerous overflow or, in extreme cases, tank rupture. Here's a breakdown of the reasons why it's crucial:

  1. Gas needs room to expand inside the tank: As temperatures rise, the gasoline expands and if there's no space left in the tank, it can leak out, potentially causing a hazardous situation.
  2. To avoid inaccurate fuel gauge readings: Expansion affects how much gasoline you actually have; for instance, a reading of "empty" in summer could mean you're out of gas sooner than expected due to the increased expansion of the fuel.
  3. Safety and maintenance issues: A full tank can exert pressure on seams and joints, leading to potential stress and leaks in the tank.

Understanding these principles is important not only for the boat's safety but also for ensuring accurate measurements of fuel levels during trips.


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