Certified Hyperbaric Technologist Practice Test

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How do you convert ATA to mmHg?

  1. Subtract 1, then multiply by 760 mmHg

  2. Multiply by 760 mmHg

  3. Add 1, then multiply by 760 mmHg

  4. Multiply by 14.7 mmHg

The correct answer is: Multiply by 760 mmHg

To convert ATA (atmospheres absolute) to mmHg (millimeters of mercury), the process involves understanding the relationship between the two units of pressure. One atmosphere is defined as being equivalent to 760 mmHg. Therefore, when you want to convert atmospheres to mmHg, you can simply multiply the value in ATA by 760 mmHg. This is based on the direct conversion factor where 1 ATA is equal to 760 mmHg. By multiplying the number of atmospheres by this conversion factor, you obtain the pressure in mmHg directly, which is a straightforward method that maintains the integrity of the measurements. Understanding that one atmosphere is a standard reference pressure is key to this conversion, making it a fundamental aspect of working with hyperbaric medicine and related fields. The other options suggest different arithmetic manipulations that do not apply to the direct relationship of the units involved, ultimately leading to incorrect conversions.

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