wade scuba class auburn exam 1

What's it called when colors diminish with depth?

Absorption

Pressure is defined as what?

D. all of them

force per unit area and is commonly expressed in bar in the metric system and pounds per square inch (psi) and atmospheres in the imperial system

Atmospheric pressure is defined as what?

33ft, 14.7psi

Depth has a significant factor in how fast our air goes?

yes the deeper we are the more we breathe

What determines how fast our air goes underwater?

depth

What are we breathing right now?

The air we breathe is roughly 21% oxygen (O2), which we all need for survival, 78% nitrogen (N2) and 1% trace gases

Different layers in water temperature are called what?

Thermocyline

Bouncey created by a wetsuit will what?

decrease with depth

What's the proper care of a regulator after diving?

run warm water through it and put the dust cap back on

Which statement about sound traveling underwater is correct?

difficult to determine location of sound underwater

What is mask clearing used for?

get water out AND

know the symptoms of hypothermia?

Shivering, although as hypothermia worsens, shivering stops. Clumsiness or lack of coordination. Slurred speech or mumbling. Confusion and poor decision-making, such as trying to remove warm clothes.

How long should it take to come up?

30ft. per minute

Know how to clear your ears.

pop them

Know how to prevent an ear squeeze

If you feel pain on the ascent, immediately stop and then slowly continue your ascent. If ear pain persists after a dive, or if there is blood in the ear canal (indicating a perforated ear drum), do not put anything in your ear and contact a physician.

-Swallowing

-Rotating the jaw

-Valsalva technique

whats the most serious lung injury

air embolism

know what you need to display to dive

divers flag

What do you do when you take your weight belt off?

hold it to the side

a reverse block occurs when?

ascending, take out regulator and stretch your jaw and go back down

Reverse squeezes happen rarely and can be usually dealt with by ascending extremely slowly or even stopping occasionally to allow the trapped gas to escape.

know the proper method of breathing underwater

The most efficient breathing pattern for scuba is a deep inhalation followed by an even exhalation — deep, balanced and rhythmic. The key is to relax in the water and realize that your breathing pattern will automatically become normal with experience.

objects appear ____________ when looking through your mask?

This makes objects look 30% larger and 25% closer.

What's the last thing you check before a jump entry?

every diver should have a dive book. T or F?

True

you can dive 10/15 pounds overweight by compensating for it with your BC. T or F?

False

Know what to do if your regulator comes out of your mouth.

sweep behind your right side or reach behind your head. blow air out of your mouth

How do you get yourself to the top?

kick yourself up. B is answer. #50

For every degree it heats up what happens to the PSI?

goes up by 5

how often should a cylinder be tested?

5 years

how often should you look in a tank?

every year

what happens when an aluminum tank heats up?

must be condemned

The primary function of the air monitor is to what?

provide the diver with a constant readout of the cylinder air pressure. C

What is the purpose of the direction monitor?

The compass helps you maintain a sense of direction when natural navigation is not possible due to a lack of distinct underwater features or low visibility. It also indicates the way back to an original dive point. There are several styles of compasses:

the time monitor what does what?

tells you how long you've been underwater

water will absorb body heat how many times faster than air?

25-30X faster

whats the proper way to take care of a wet suite

After diving, soak your exposure suit with wetsuit shampoo, and hang to dry. Never store your suit folded or compressed. It could become permanently creased and create cold spots where the bubbles have broken down. Hang the suit on a wetsuit hanger and store in a cool dry place.