Scuba

If I think I'm overexerting while underwater, I should stop, signal my buddy and: a. rest b. ascend immediately c. use purge-assisted breathing d. fully inflate my BCD

rest

A depth change of 10 meters/33 feet causes a pressure change of A. 1 bar/ata B. 2 bar/ata C. 3 bar/ata D. 4 bar/ata

1 bar/ata

As a newly certified PADI Open Water Diver, I will be trained to dive with a buddy as deep as: A. 10 meters/30 feet B. 18 metres/60 feet C. 30 mètres/ 100 feet D. 40 mètres/130 feet

18 metres/60 feet

If you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be ________ liters. A. 1 B. 2 C. 3 D. 4

2

My buddy and I are planning a boat dive with the same type cylinders filled to 200 bar/3000 psi. Due to conditions, we are planning very conservatively. We agree on 60 bar/800 psi for our reserve. We agree that we also want an additional 30 bar/500 psi for our ascent and safety stop. This means begin our ascent when either of our SPG reads: a. 50 bar/800 psi b. 70 bar/1000 psi c. 90 bar/1300 psi d. 110 bar/1700 psi

90 bar/1300 psi

To control my buoyancy, normally I will use my weight system and my a. fins b. scuba cylinder c. wet suit d. BCD

BCD

TF: A cylinder with a higher working pressure always holds more air than a cylinder with a lower working pressure

False

TF: From among masks that fit me, I should a mask that fits as far away from my face as possible.

False

TF: I'm descending in open water with my buddies. After confirming they are ready, the next step is to signal "descend" and slowly deflate my BCD

False

TF: My SPG is always part of my dive computer

False

TF: Salt water causes more buoyancy than fresh water because it is less dense and weighs less

False

TF: There's no real benefit to choosing the components of my scuba kit as an integrated package

False

While my buddy and I are diving, a motorboat passes by about 300 meters/yards away. Which of the following statements is true? a. it will sound farther away (quieter) than in air b. I may have difficulty determining where the boat is based on the sound c. it will sound like its straight below me

I may have difficulty determining where the boat is based on the sound

I'm renting a scuba cylinder at a dive resort. Among the cylinders for hire, some have green and yellow bands that read "Nitrox." As a PADI Open Water Diver with no other training or instructor supervision, am I qualified to use one of those cylinders?

No

TF: At the surface, its a good habit to keep my mask on and my snorkel or regulator in my mouth because it helps me deal with difficulties more effectively

True

TF: Because water is denser than air, it takes more effort to move through water

True

TF: Buoyancy is a force that pushes an object in water upward

True

TF: Certain medical conditions can be hazardous while diving, so it is important to answer all questions on the Medical Statement honestly and completely.

True

TF: Failure to complete assigned independent study can create significant delays, and my instructor may have to cancel and reschedule sessions until I complete the assignment

True

TF: Failure to follow the most important rule in scuba diving can cause severe lung over expansion injuries, which can result in paralysis or death

True

TF: Fins provide a large surface area so my legs can push against the water effectively

True

TF: Getting the service my gear needs may be a consideration when choosing equipment.

True

TF: I chill faster in water than in air of the same temperature because water absorbs more heat than air does.

True

TF: I equalize gently because an extended, forceful equalization can cause permanent damage to my ears and hearing

True

TF: I must be able to quickly release enough weight to float reliably in an emergency, but not necessarily all my weight.

True

TF: If I'm tired, have labored breathing and feel air-starved and anxious during a dive, it is likely I am experiencing overexertion

True

TF: In recreational diving, the buddy system means diving with another diver or divers in a team that provides assistance and safety benefits

True

TF: It is important to master buoyancy control because it affects almost everything I do in and underwater.

True

TF: My BCD should have adequate capacity to easily float my equipment and me at the surface

True

TF: My body responds to anxiety with increased breathing, but slow breathing helps reduce anxiety.

True

TF: My buddies and I are planning a dive. Among other things, we should address how to enter and exit the water, the maximum depth and time, when to turn the dive and what to do if we get separated.

True

TF: My local dive pro will usually set up my regulator components

True

TF: One reason for wearing more than one weight system is that it is sometimes easier than handling a single, heavier one.

True

TF: Regulators need periodic overhauls, typically every year to two years

True

TF: Snorkels are standard equipment for scuba diving because they allow me ti breathe with my face in the water, or in rough conditions, without wasting my scuba air, especially when I have little scuba air remaining.

True

TF: Some scuba divers prefer a snorkel with a flexible lower portion so it drops out of the way when not in use

True

TF: Streamlining benefits me as a diver because it reduces drag, which helps me save energy

True

TF: The LPI mechanism inflates the BCD with air from my scuba cylinder

True

TF: To prepare adjustable fins, I should adjust the straps wearing my wet suit boots

True

TF: When diving in a new dive environment, two benefits of seeking an orientation, supervision and/or additional training are that it helps me avoid problems and that it helps me enjoy the dive more

True

TF: When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure

True

My buddy is rinsing a BCD and partially fills the bladder with water. Is this consistent with recommended BCD care? a. yes b. no

Yes

A squeeze is caused by: a. wearing my wet suit or other gear too tightly b. a pressure imbalance between the surrounding pressure and an air space

a pressure imbalance between the surrounding pressure and an air space

I want to adjust my mask so the strap rests a. below my ears, above the neck b. over my ears, below the crown of my head c. above my ears, over the crown of my head

above my ears, over the crown of my head

Equalization is the process of a. adding air to an air space b. removing air from an air space c. reducing the surrounding pressure d. increasing the surrounding pressure

adding air to an air space

The two basic fin styles are ____________ fins. a. large blade and small blade b. freshwater and marine c. vented and split d. adjustable and full-foot

adjustable and full-foot

Overall benefits of the buddy system include: (check all that apply) a. practicality b. safety c. fun

all of the above

Which of the following are among the breathing rules I follow as a diver? (check all that apply) a. breathe 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

all of the above

I should equalize a. when I feel pain or discomfort b. only if I can't tolerate the pain or discomfort c. before I feel pain or discomfort d. when I reach the bottom

before I feel pain or discomfort

When choosing an alternate air source, a primary consideration involves deciding a. whether to let it dangle b. where to secure it c. between independence and simplicity d. whether you really need one

between independence and simplicity

My primary considerations when choosing fins are fit and: a. blade size b. material c. splits d. vents

blade size

The most important rule in scuba diving is to: a. always dive with a buddy b. breathe continuously and never hold your breath c. check your air supply every five minutes

breathe

A balloon fully inflated and sealed at 10 meters/33 feet, would probably ____________ during ascent to the surface. A. shrink (become smaller) B. burst

burst

The _____________ is a safety device that relieves accidental overpressure by releasing air before reaching the pressure at which the cylinder would fail. a. DIN value b. burst disk c. cylinder alloy

burst disk

Accessory weights: a. must have quick releases b. can help you adjust your trim c. require special training

can help you adjust your trim

On a day I plan to go diving, I wake up with my sinuses blocked due to a cold or allergy. I should: a. take an approved decongestant so I will be able to equalize b. plan to take a longer as I descend c. cancel the dive until i'm well

cancel the dive until I'm well

The three most important considerations in choosing scuba equipment are suitability, fit and _____________. a. cost and features b. color and style c. manufacturer d. comfort

comfort

When I conduct a predate safety check, the "A" in the recall phrase includes: a. assuming that all releases are secure b. confirming adequate air pressure for the dive c. adjusting the BCD d. addressing weight system issues

confirming adequate air pressure for the dive

Water's density works best for me when I use the skill of: a. shallow, rapid breathing b. clearing water from my mask c. equalizing my ears, sinuses and mask d. controlling my buoyancy

controlling my buoyancy

When I descend, my buoyancy tends to ____________. When I ascend, it tends to ______________. a. increase, increase b. increase, decrease c. decrease, increase d. decrease, decrease

decrease, increase

The most efficient way to breath dense air underwater is to breathe a. shallowly and slowly b. shallowly and rapidly c. deeply and slowly d. deeply and rapidly

deeply and slowly

Trim means having the right ___________ of weight. a. distribution b. amount c. shape

distribution

The most important consideration when choosing a regulator is a. ease of breathing b. color c. dive/predive switch d. adjustable second stage

ease of breathing

After 30 minutes underwater, I start to feel a bit too cool and uncomfortable, I should: a. increase my activity b. keep my arms by my sides c. end the dive

end the dive

While diving, I start to feel cool and shortly begin to shiver uncontrobally, I should: a. increase my activity b. keep my arms by my sides c. end the dive immediately, dry off and seek warmth

end the dive immediately, dry off and seek warmth

My mask encloses my nose so I can: a. equalize my mask b. suck the mask into place

equalize my mask

Scuba cylinders require pressure testing ______________ and visual inspection _____________. a. annually, annually b. annually, every 2-5 years c. every 2-5 years, annually d. every 2-5 years, every 2-5 years

every 2-5 years, annually

TF: As my buddy and I kit up, the normal practice is to be entirely independent. Helping each other is discouraged.

false

My bussy and I descend to 12 metres/40 feet. I would expect to use my air ______________ at 6 meters/20 feet a. slower than b. at the same rate as c. faster than

faster than

My BCD should fit: a. very tightly and restrict breathing when fully inflated b. fit snugly but not restrict breathing when fully inflated

fit snugly but not restrict breathing when fully inflated

As you descend in water, the pressure A. increases B. decreases C. does not change

increases

Underwater, when I inhale, my buoyancy a. decreases slightly b. increases slightly c. doesn't change

increases slightly

Before each use, I should __________________ my equipment. a. inspect b. wash c. warm d. dry

inspect

My buddies and I plan to enter the water, but swim on the surface to a descent point about 50 metres/yards away. A primary reason we will do this is because: a. it's easier than descending immediately b. it saves our cylinder air for the dive c. we enjoy the exercise

it saves our cylinder air for the dive

Underwater objects appear: a. larger and/or closer b. smaller and/or more distant c. the same as they do in air

larger and/or closer

My buddy has a bright red shoulder patch on his wet suit. If we're diving together in very clear water on a sunny day, at 12 metres/40 feet I would expect the patch to appear: a. more vivid red b. less red than at the surface c. blue

less red than at the surface

If my buddy and I get separated, the general procedure is to: a. return to where I last saw my buddy and wait b. search until we reunite or until I run low on air c. bang on my cylinder to get my buddy's attention with sound d. look for each other for no more than a minute, then reunite on the surface

look for each other for no more than a minute, then reunite on the surface

As I descend, increasing pressure affects my (choose all that apply): a. mask b. ears c. sinuses d. skin

mask ears sinuses

PADI courses are performance-baed. This means that to be certified, I must A. meet specific performance requirements B. spend a given number of hours in training C. simply pay for the course

meet specific performance requirements

The buddy system is ___________ responsibly a. my b. the divemaster's c. my buddy's d. no one's

my

I need a mask because a. I will inhale water without it b. my eyes must be in air to focus

my eyes must be in air to focus

For the 50 metre/yard swim, my buddies and I will swim ______________ because it is less tiring. a. face down b. on our backs

on our backs

I should have my scuba cylinder filled: a. from any compressed air source b. with pure oxygen c. with pure nitrogen d. only by reputable scuba air stations

only by reputable scuba air stations

When my snooker is in my mouth, the tip should be a. above my forehead b. over the crown of my head c. at the base of my skull

over the crown of my head

Trim is important for streamlining because: a. poor trim raises or lowers my feet, causing drag b. it means I have the correct amount of weight

poor trim raises or lowers my feet, causing drag

My sunglasses case falls out of my pocket into the water, but fortunately, it floats so I retrieve it. I would say my sunglass case is ____________ buoyant. a. positively b. negatively c. neutrally

positively

Overexertion results from a. slow, deep breathing b. prolonged increased effort c. normal swimming

prolonged increased effort

The most important feature in my weight system is its a. comfort b. quick release c. size d. trim

quick release

One method of airway control is to inhale slowly. I can also _______________ to help breathe past small amounts of water in my regulator. a. tilt my head upward b. press the purge button c. close and reopen the cylinder valve d. raise my tongue

raise my tongue

I bring a cylinder aboard a dive boat in preparation for a trip out to a nearby reef. The normal procedure would be to a. stand the cylinder on the deck b. lay the cylinder on the deck c. secure the cylinder in a rack

secure the cylinder in a rack

When setting up and wearing my kit, the alternate air source a. dangles on either side b. secures in a triangle formed by my hips and chin c. goes in a pocket on my left d. goes in a pocket on my right

secures in a triangle formed by my hips and chin

To stay with my buddy while surface swimming, generally it works well to swim: a. side by side b. with the faster diver in front c. with the slower diver in front

side by side

While scuba diving, I should breathe: a. rapidly and shallowly b. slowly and deeply

slowly and deeply

To move efficiently was a diver, I should move: a. quickly and steadily b. quickly and sporadically c. slowly and steadily d. slowly sporadically

slowly and steadily

I'm descending and discover I can't equalize. The first thing I would do is: a. equalize more forcefully b. stop my descent and signal my buddy/the instructor c. slow my descent and see if the problem corrects itself

stop my descent and signal my buddy/instructor

During ascent I feel discomfort in my ears, I should: a. continue my ascent at a slightly faster rate b. stop, descend slightly and allow trapped air to work its way out c. use a decongestant before the next dive d. equalize by blowing gently against blocked nostrils

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

The density of the air in the previous question would be ___________ the density of the surface A. one-third B. one-half C. three times D. four times

three times

When descending with a reference, I would normally: a. make physical contact with it b. ignore the reference and use my dive computer c. use it as visual references only

use it as visual references only

To stay comfortably warm during a dive, I: a. wear an appropriate exposure suit b. near dive in water colder than 24C/75F

wear an appropriate exposure suit