Scuba Diving

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The most important consideration when selecting dive equipment is

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Fit

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The best type of fin to use if someone has knee or hip problems is

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Split fins

Front 3

What do you not let inside of your regulator when rinsing it?

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Water

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The most important thing about your weight system is that

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Weights can be ditched easily in an emergency

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Tanks require a hydrostatic test every ——- years and a VIP inspection every —- year

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5 , 1

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The tank should never be stored empty because

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Bacteria can get inside

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Provides emergency floatation, buoyancy compensation, and a tank harness

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A buoyancy compensator

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We should wear our snorkel ...

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All the time (snorkeling and scuba diving)

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We wear wetsuits to provide

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Warmth

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In the water, a knife is used as a

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Tool

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Scuba regulators are —- —— regulators

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Demand flow

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Normally in a 2 stage, single hose regulator, the pressure reduction in the first stage is cylinder pressure to

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150 psi plus ambient pressure

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It is recommended that at the end of the dive, the air reserved to the surface is —- psi

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500 psi

Front 14

Empty scuba tanks should be stored with —- to —— psi

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200 to 400 psi

Front 15

A properly weighted diver will float ..

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Float at eye level with a breath of air in your lungs

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Steps to remove a regulator from the tank (4)

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1. Turn off the air

2. Breath or purge remaining air from high pressure system

3. Losses yoke screw

4. Remove regulator

Front 17

A dive flag is

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Red with a diagonal white stripe

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On a night dive, you should have

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One light per diver plus backup light

Front 19

When diving in a location with fishing boat traffic, you should have (2)

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1. Knife

2. Dive flag

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The MOST important thing to remember about your weights is that they should have a ..

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Quick release mechanism

Front 21

The fish that lays in the sand and inflicts a wound with a barb is a

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Sting ray

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Stings caused by nematocysts are best treated by..

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Neutralizing with baking soda or an ammonia solution

Front 23

The moray eel is usually harmless if you (3)

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1. Stay away from its home

2. Keep your hands out of rocky holes

3. Be careful while looking for lobster

Front 24

There is a greater chance that a shark will attack if you are swimming

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At the surface of the water

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A diver unfamiliar with coral should

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Never touch it

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The Portuguese Man-of-War is a

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Hydroid

Front 27

To escape from a rip current, swim ..

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PERPENDICULAR to the current

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The zone in which there is an abrupt change of water temperature is called a

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Thermocline

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Most surface waves are caused by

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Winds

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A longshore current is caused by

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Waves approaching the shore at an angle

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The water movement during a surge is

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Back and forth

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Currents encountered offshore when diving are

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Primarily predictable, major currents

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When diving near an inlet or any place with a tidal change, you should consult the local tide tables and plan to dive ..

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Just prior to high tide and plan to get out just before the tide begins to change

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NOT necessary when towing a victim

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Your mask being on

Front 35

Best way to stop bleeding is

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Applying direct pressure

Front 36

Symptoms of shock include (3)

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1. Dilated pupils

2. Pale/clammy skin

3. Unconsciousness

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If air exchange is not apparent when first attempt of mouth to mouth resuscitation, you should immediately check (2)

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1. Head position

2. Jaw position

Front 38

The two objectives for First Aid treatment are

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1. Immediate help

2. Temporary help

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Symptoms of heat exhaustion (2)

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Red and sweaty

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Symptoms of heat stoke are (2)

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Cool and clammy hands

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INNAPPROPRIATE WAY to treat air embolism

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Elevate head and apply cold compress

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HYPOthermia is best treated by a

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Very warm bath

Front 43

Upon retrieving an unconscious diver who has stopped breathing, your first consideration should be to start..

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Artificial respiration

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When approaching a conscious diver who is calling for help on the surface, the first course of action should be to

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Determine if the victim is rational or not, before getting close

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The most common cause of a lung over expansion injury is

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Rapid ascent while holding your breath

Front 46

Vertigo can be caused by a

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Ruptured eardrum

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A treatment designed to reduce bubble size and restore circulation in an embolized diver

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HYPERbaric Treatment

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When the nitrogen in the air we breath becomes Botox in excess of 130 ft

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Nitrogen Narcosis

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The best technique or maintaining normal lung volume

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Breathing normally while ascending

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The Eustachain tube is located in the

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Back of the throat to the MIDDLE EAR for easy clearing of the ear

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Divers should equalize

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Early and often

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For maximum efficiency, your breathing should be

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Slightly SLOWER and deeper than normal

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The most serious result of lung overexpansion is an (2)

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1. Air Embolism

2. Arterial gas embolism

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Nitrogen is a metabolically inert gas meaning the body

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Does not use the nitrogen

Front 55

The volume of a balloon at the surface is 20 cubic feet, the volume of this balloon at 66 feet is — cubic feet

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6.66 cubic feet

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Ambient pressure at 99 feet is — atm

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4 atm

Front 57

Because the absorption of light rays as they pass through the water, we first notice the disappearance of

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Red

Front 58

Water carries away body heat approximately — times faster than air

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25x faster

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Air is approximately —- oxygen and —- nitrogen

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21% and 79%

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Salt water is —— dense and therefore provides —- buoyancy than fresh water

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More, more

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Best explains diving medical problems such as ear sinus and squeeze

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Boyle’s Law

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Objects appear approx. 1/3 closer underwater due to

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Refraction

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Sea water weighs

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64 pounds per cubic foot

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A diver makes a dive 81 feet for 18 minutes. What’s his repetitive group designation?

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F

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Does 911 work everywhere?

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No

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Interruption of flow to the BRAIN

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Stroke

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To little and too much oxygen is

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Bad for us

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Manages nitrogen we take on in our bodies

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Dive Tables

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Can’t breath, taking on water

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Drowning

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Basically dead, can happen up to 24 hours later

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Near drowning

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How do you treat someone who had a stoke?

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Elevate their legs

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How do you treat someone who has an air embolism

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Keep their heads up

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Hyper

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Too much

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Hypo

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Too little

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Types of HYPERthermia (2)

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1. Heat Exhaustion

2. Heat stroke

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Between heat stroke and heat exhaustion, who do you not give fluids too and who do you give fluids too?

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Heat Stroke - do no give fluids

Heat Exhaustion - give fluids

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To prevent / treat sea sickness (4)

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1. Don’t eat greasy food beforehand

2. Take drugs

3. Get yourself centered on the boat

4. Look at the horizon

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Sharks and other animals attack because it’s a —— move

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Defense

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For sea urchins, if the spine is embedded and in their...

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Keep it in

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Medical treatment for air embolism is

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Decompression Chamber

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Ruptured tempatic membrane will give you

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Vertigo