Oleo strut inflation is checked by measuring the length of the exposed what?

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Multiple Choice

Oleo strut inflation is checked by measuring the length of the exposed what?

Explanation:
The amount of gas (air or nitrogen) inside an oleo strut sets the height by pushing on the oil-filled cylinder; this gas pressure moves the piston inside the tube. The portion of the piston tube that is exposed outside the cylinder changes as the piston shifts with that gas pressure. Therefore, measuring how much piston tube is exposed gives a direct, repeatable indication of whether the inflation is at the specified level. The other parts shown don’t provide a straightforward, reliable indicator of the air charge, so the exposed piston tube length is the practical reference for inflation checks.

The amount of gas (air or nitrogen) inside an oleo strut sets the height by pushing on the oil-filled cylinder; this gas pressure moves the piston inside the tube. The portion of the piston tube that is exposed outside the cylinder changes as the piston shifts with that gas pressure. Therefore, measuring how much piston tube is exposed gives a direct, repeatable indication of whether the inflation is at the specified level. The other parts shown don’t provide a straightforward, reliable indicator of the air charge, so the exposed piston tube length is the practical reference for inflation checks.

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