Scuba Diving Scuba Diving Equipment 3

Question 1

Why is it important to rinse scuba equipment with fresh water after a dive?

Accepted Answer

Remove salt, sand, and debris that cause corrosion

Answer

Rinsing equipment with fresh water removes corrosive saltwater, sand, and biological debris that can degrade materials and mechanisms over time.

Question 2

What is the function of the second stage in a two-stage scuba regulator system?

Accepted Answer

Deliver air at ambient pressure directly to the diver's mouth

Answer

The second stage reduces the intermediate pressure from the first stage down to the surrounding ambient pressure, delivering breathable air on demand.

Question 3

What is an alternate air source (octopus) used for?

Accepted Answer

Provide air to an out-of-air dive buddy

Answer

An octopus is a spare second-stage regulator given to a buddy who has run out of air during an emergency ascent.

Question 4

How often must scuba tanks be hydrostatically tested in the US?

Accepted Answer

Every 5 years

Answer

In the United States, scuba tanks must undergo hydrostatic testing every 5 years to verify structural integrity under pressure.

Question 5

What type of buoyancy does a properly weighted diver have at the surface?

Accepted Answer

Slightly positive (floating at eye level with lungs full)

Answer

A correctly weighted diver floats at eye or mouth level at the surface with a full breath, allowing them to sink with a normal exhale.

Scuba Diving Practice Test

Scuba Diving Practice Test

Scuba Diving Scuba Diving Equipment 3