Understanding Scuba Diving Principles

What happens to your lungs if you hold your breath while scuba diving?

• They inflate and deflate normally

• They become smaller or larger due to pressure changes

• Nothing happens

• They filter water

Why should you never hold your breath during scuba diving?

• To prevent lung over-expansion

• To swim faster

• To avoid getting wet

• To conserve air

What causes pressure to change underwater?

• The color of the water

• The temperature of the water

• The depth of the dive

• The time of day

How does diving deeper affect the volume of air spaces?

• Volume fluctuates randomly

• Volume decreases

• Volume stays the same

• Volume increases

What is the unit used to measure ambient pressure underwater?

• Pound

• Celsius

• Atmosphere

• Liter

At what depth does the ambient pressure double from sea level?

• 10 feet

• 33 feet

• 100 feet

• 132 feet

What happens to the volume of air spaces as you dive deeper?

• It doubles

• It halves

• It remains constant

• It quadruples

How deep can recreational scuba divers safely dive?

• Up to 1 atmosphere

• Up to 3 atmospheres

• Up to 5 atmospheres

• Unlimited depth as long as they have air

Who is Chris Brock?

• A boat captain

• A PADI instructor

• A marine biologist

• A professional swimmer

Where does Chris Brock offer scuba diving lessons?

• Cancun, Mexico

• Maui, Hawaii

• Red Sea, Egypt

• Great Barrier Reef, Australia