AMP - Aviation Maintenance Technician Powerplant Practice Exam

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Specific gravity is a comparison of the weight of a substance to the weight of an equal volume of?

  1. Oil at a specific temperature

  2. Distilled water at a specific temperature

  3. Mercury at a specific temperature

  4. Air at a specific temperature

The correct answer is: Distilled water at a specific temperature

Specific Gravity is a measurement that compares the density or weight of a substance to the density or weight of an equal volume of water. This means that the correct choice must involve water, as it is used as the standard for this comparison. Oil, mercury, and air do not have the same density as water and therefore would not be an appropriate choice for a specific gravity comparison. Additionally, the temperature of the substance does not affect its specific gravity as it is a constant property of a substance. Therefore, choice B, distilled water at a specific temperature, is the correct answer.

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