PADI Scuba - Open Water

1-1.2 A depth change of 10 meters / 33 feet causes a pressure change of

1 bar/ata

What is the pressure at 0 meters/0 feet?

1 bar/ata

At a minimum, I should have ___ visual and ___ audible signaling devices

1, 1

Me and my buddy have just finished a dive to 15 meters/ 50 feet for 60 min. We want to return to the same site and depth and stay another 60 mins. We can ______ to see about how long we have to remain at the surface to have enough no stop time.

1. wait and check our no stop time on our computers periodically 2. use dive computer plan mode 3. use dive planning app 4. use RDP table or eRDPml

I've finished a single no stop dive with my budy. We have not been diving in the past several days. Based on current recommendations, minimum surface interval before we fly is:

12 hours

If you do a dive that requires an emergency decompression stop, you must have a min preflight surface interval greater than:

18 hours

0-1 As a newly certified PADI Open Water Diver, I will be trained to dive with a buddy as deep as _____

18 meters/60 feet

1-1.3 If you take 6 liters of air from the surface to 20 meters/66 feet, the volume will be _____ liters

2

When diving at altitudes of _______ or greater, I need to use altitude diving procedures.

300 meters/1000 feet

1-2.3 Equalization is the process of:

Adding air to an air space

The four stages of dive planning:

Advance planning, preparation planning, last-minute preparation and predive planning

What happens to air density as depth and pressure increase?

Air Density increases, for example if you are at the depth of 33 ft, pressure would be 2 bar/ata and air density would be x2

How often do scuba cylinders require visual inspection?

Annually

During a dive, my computer fails, and i'm not using a backup. I should:

Ascend, make safety stop and end the dive

1-2.4 I should equalize:

Before I feel pain or discomfort

If there is a current, how would you begin your dive?

Begin swimming into the current so that when you head back the current will assist you return instead of pushing you away from your exit

1-3.1 The most important rule in scuba diving is to:

Breathe continuously and never hold your breath

1-1.5 A balloon fully inflated and sealed at 10 meters/33 feet would probably ____ during ascent to the surface

Burst

1-2.7 On a day I plan to go diving I wake up with my sinuses blocked due to a cold or allergy. I should

Cancel the dive until I'm well

During an underwater cleanup, my buddy and I fill a large mesh utility bag with several kilograms of garbage, we should:

Carry the bag in our hands

Exceeding my computer or table's ascent rate may increase my risk of ____

DCS

Padi's Four E Philosophy

Equipment, Education, Experience, Environment

How often do scuba cylinders require pressure testing?

Every 2-5 years

What is the priority for an unresponsive diver underwater?

Getting the victim to the surface, checking for breathing and providing rescue breaths if the victim isnt breathing

1-1.1 As you descend, what happens to pressure

Increases

At the surface I have a problem. What should I do first?

Inflate BCD

What is the reason for taking roll on a dive boat?

Make sure everyone's aboard after each dive

If you see an out of control diver, what should you do?

Make yourself and the diver buoyant

What is the most important feature in my weight system?

Quick release

Five Point Ascent

S - Signal & agree with your buddy that you are ascending T - Time, check the time to identify your exact bottom time A - Arms,raise your right hand to protect you & raise your left arm whilst holding onto the BCD inflate/deflate hose to control your ascent rate L - Look up and around to ensure a clear passage to the surface K - Kick towards the surface, controlling your speed by deflating the BCD as required Ensure that you and your buddy ascend to the surface together & inflate your BCD when you have surfaced to ensure positive buoyancy

Five Point Descent

S - Signal that you & your buddy are ready to descend O - Orientate yourself on the descent line or buddy for the descent R - Regulator In. Swap from your snorkel to your regulator T - Time. Check the start time of your descent ED - Equalise as your Descen

What is the proper procedure for buddy separation?

Search for no more than a minute, then reunite on the surface

If I am planning to dive to 12 meters/40 feet, my no stop limit will be ____ than my no stop limit for a dive to 10 meters/ 30 feet.

Shorter

My buddy and I are planning a dive to 18 meters/60 feet. We would expect our air supply to last ____ at 10 meters/33 feet, all else being the same.

Shorter than

What are accepted ways of equalizing my ears?

Swallow and wiggle the jaw from side to side, Block my nose and attempt to gently blow through it

How does pressure increase as you descend?

The pressure increases by one bar/ata for each 10 meters/33 feet you descend

1-1.4 (If you take 6 liters of air from the surface to 20 meters/66 feet, the volume will be _____ liters.) The density of the air in the above question would be ______ the density at the surface.

Three-times

0-2 Certain medical conditions can be hazardous when diving, so it is important to answer all questions on the Medical Statement honestly and completely.

True

1-2.6 I equalize gently because an extended, forceful equalization can cause permanent damage to my ears and hearing.

True

1-2.8 When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure

True

1-3.2 Failure to follow the most important rule in scuba diving can cause severe lung overexpansion injuries, which can result in paralysis or death.

True

1-5.1 Buoyancy is a force that pushes an object in water upward.

True

What happens to air volume as depth and pressure increase?

Volume decreases, for example if you are at the depth of 33 ft, pressure would be 2 bar/ata and air volume would be 1/2

A squeeze is caused by:

a pressure imbalance between the surrounding pressure and an air space

Burst disk

a safety device that relieves accidental overpressure by releasing air before reaching the pressure at which the cylinder would fail

1-4.4 Which of the following are among the breathing rules I follow as a diver?

a. Breath continuously and never, ever, hold my breath. b. Breathe slowly and deeply c. Do not allow myself to get winded or out-of-breath. d. If faced with a problem, stop, then maintain or restore slow, deep breathing.

What are the two basic fin styles?

adjustable and full-foot

What are some secondary factors that can contribute to DCS?

age, cold, injuries, poor fitness

Before diving I should refrain from using:

alcohol/drugs

A no stop dive time means that I can, _______ the dive, ascend directly to the surface without stopping if necessary (although I would plan a safety stop usually)

at any time during

While underwater, I want to move efficiently by:

being streamlined, swimming slowly and steadily, and maintaining proper trim

When I descend, my buoyancy tends to:

decrease

1-4.2 The most efficient way to breathe dense air underwater is to breathe

deeply and slowly

When diving with a computer it is recommended that I:

dive well within its limits, follow the most conservative computer, start the deepest point and progress shallower, ascend slowly and make a safety stop

What are symptoms of contaminated air?

dizzinesss/illness/headache

True or false, there is no way to use a DIN regulator on a toke cylinder valve

false

1-4.1 My buddy and I descend to 12 meters/40 feet. I would expect to use my air ____ at 6 meters/20 feet

faster than

My primary considerations while choosing fins are:

fit and blade size

Positive buoyancy

floats

What is one way to avoid disorientation while descending and ascending?

follow a reference

Trim

having the right distribution of weight

Although somewhat subjective, I measure visibility as how far I can see:

horizontally

nearly all cases of decompression illness require treatment

in a decompression chamber

What are risks of diving beyond my limits?

in some forms of diving, the hazards are not obvious, it can cause me to have a false sense of security, anxiety from doing so can distract me from noticing other problems

When I ascend, my buoyancy tends to:

increase

While boat diving, my buddy and I ascend to the surface. When I reach the surface I should:

inflate my BCD, switch to my snorkel and signal "okay" to the divemaster

My buddy and I accidentally find ourselves in a rip current. There are no special, local procedures, so we follow the generally recommended action of:

inflating our BCDs and swimming parallel to shore

I want to avoid bottom contact because:

it helps keep the water clearer, there may be some hazard of cuts, scrapes or stings

Underwater objects appear:

larger/closer

My buddy and I are diving from a boat in mild to moderate current. There is a line from the back of the boat where we'll enter, which leads to the mooring line at the front of the boat. The purpose of the line leading to the mooring line is to:

let us pull ourselves to the mooring line

my buddy and i travel in a straight line using the compass, I should point the _______ in our desired direction, then rotate the _____ until the _____ is/are over the _____

lubber line, bezel, index marks, magnetic north needle

Holding your breath while scuba diving can lead to:

lung overexpansion injuries

1-2.1 As I descend, increasing pressure affects my:

mask, ears, sinuses

0-3 PADI courses are performance-based. This means that to be certified, I must

meet specific performance requirements.

To help a diver with suspected decompression illness, I should:

monitor diver's breathing and provide CPR if necessary, contact emergency medical care provide emergency oxygen

Why can altitude be a problem?

most decompression models are based on surfacing at sea level

What are possible symptoms of decompression sickness?

numbness, tingling and weakness in the arms

Which of the following steps should I take before actually beginning my descent?

orient myself with something at surface, check that my computer is active, confirm my buddy is ready

Which of the following can be a problem before the dive when diving on a warm day in a wet or dry suit?

overheating

1-5.2 My sunglass case falls out of my pocket into the water, but fortunately, it floats so I retrieve it. I would say my sunglasses case is _______ buoyant.

positively

What are the three benefits of the buddy system?

practicality, safety, and fun

On a repetitive dive, for a given depth my no stop limits will be ____ those of the first dive.

shorter than

negative buyoancy

sinks

As a new PADI open water diver, I should refresh my dive skills with a PADI Scuba Review after _____ of inactivity

six months

1-2.5 I'm descending and I discover I can't equalize. The first think I would do is:

stop by descent and signal my buddy/the instructor

1-3.3 During ascent I feel discomfort in my ears. I should:

stop, descend slightly and allow trapped air to work its way out

What are the three most important considerations in choosing scuba equipment?

suitability, fit, and comfort

My buddy and I get disoriented while boat diving. There is a mild current and we surface away from the boat. We should ____. If unable to reach the boat we should ____

swim across the current to reach trail line; become buoyant and signal boat

What are some conditions that may affect me while diving?

temperature, water movement, sunlight, aquatic life, and bottom composition

The best entry is usually:

the easiest one

during a dive, I feel i'm having trouble thinking clearly:

this may be narcosis, signal my buddy and ascend to a shallower depth

What are the two primary factors that influence how much nitrogen dissolves into my body tissues during a dive?

time and depth

I would find a minimum surface interval when, after a dive, I want to know how long the _____ would be.

time at the surface

To prevent/ handle injuries caused by aquatic life, I should:

watch where I put my feet, hands, and knees; wear an exposure suit, treat all organisms with respect; be familiar with potentially hazardous animals; be prepared to provide first aid

neutral buoyancy

weighs the same as the water it displaces and neither floats nor sinks