Certified Hyperbaric Technologist Test Hyperbaric Physics Fundamentals 2

Question 1

According to Boyle's Law, what happens to the volume of a fixed mass of gas as pressure increases at constant temperature?

Accepted Answer

Volume decreases inversely

Answer

Boyle's Law states that volume is inversely proportional to pressure at constant temperature.

Question 2

A gas bubble has a volume of 10 mL at the surface (1 ATA). What is its approximate volume at 2 ATA?

Accepted Answer

5 mL

Answer

By Boyle's Law, doubling absolute pressure halves the volume, so 10 mL becomes 5 mL.

Question 3

At what depth of seawater does the absolute pressure equal 2 ATA?

Accepted Answer

33 feet

Answer

Each 33 feet of seawater adds 1 atmosphere, so 33 feet plus surface equals 2 ATA.

Question 4

Which gas law explains why a sealed flexible container expands during ascent (decompression)?

Accepted Answer

Boyle's Law

Answer

Boyle's Law explains volume expansion as ambient pressure decreases during ascent.

Question 5

The term 'ATA' stands for which of the following?

Accepted Answer

Atmospheres Absolute

Answer

ATA means Atmospheres Absolute, the total pressure including atmospheric pressure.

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