ATC Aquatic Exercise 2

Question 1

A person whose body has a specific gravity less than 1.0 will do what when immersed in fresh water?

Accepted Answer

Float

Answer

Objects less dense than water (specific gravity below 1.0) float because buoyant force exceeds their weight.

Question 2

Which statement best describes buoyant force according to Archimedes' principle?

Accepted Answer

It equals the weight of the fluid displaced and acts upward

Answer

Buoyant force is an upward force equal to the weight of the fluid displaced by the immersed body.

Question 3

Hydrostatic pressure on a submerged limb increases primarily with:

Accepted Answer

Depth of immersion

Answer

Hydrostatic pressure is proportional to fluid density and depth, so deeper segments experience more pressure.

Question 4

A patient floating supine rotates until which two points are vertically aligned?

Accepted Answer

Center of gravity and center of buoyancy

Answer

A floating body rotates until the center of gravity and center of buoyancy lie on the same vertical line.

Question 5

A therapist wants to increase resistance during shoulder horizontal abduction without changing water depth. Which change is most effective?

Accepted Answer

Add webbed gloves or paddles

Answer

Increasing the surface area moving through water, or the speed, raises drag resistance.

ATC - Aquatic Therapy Certification Practice Test