PADI - Section 1

If you take 6 liters of air from the surface to 20 meters/66 feet, the volume will be ________ liters. a) 1 b) 2 c) 3 d) 4

b) 2

During a descent, I try to equalize but discover I'm having trouble doing so. Which of the following is correct? a) Slow my descend, signal my buddy to slow down, and equalize more forcefully b) Stop my descent, signal my buddy, ascend slightly and try again c) continue my descent while equalizing repeatedly d) signal my buddy, ascend to the surface and start my descent over

b) Stop my descent, signal my buddy, ascend slightly and try again

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. a) longer than b) shorter than c) the same as

b) shorter than

I am 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

b) stop my descent and signal my buddy/the instructor

What is the pressure, volume, and density at a depth of 0m/0ft?

Pressure: 1 bar/ata Volume: 1 Density: x1

To prepare adjustable fins, I should adjust the straps wearing my wet suit boots. True or False

True

An object that is neutrally buoyant in fresh water will __________ in salt water. a) sink b) float c) be neutrally buoyant

b) float

There is no way to use a DIN regulator on a yoke cylinder valve. True or False

False

A cylinder with a higher pressure always holds more air than cylinder with a lower working pressure. True or False

False. A cylinder's capacity to depends upon both its working pressure and its internal capacity.

There is no real benefit to choosing the components of my scuba kit as an integrated package. True or False

False. Although the components are generally interchangeable, choosing your scuba kit as a package helps you best meet your preferences.

From among masks that fit me, I should choose a mask that fits as far away from my face as possible. True or False

False. Choose a profile that sits as close to your face as possible.

Salt water causes more buoyancy than fresh water because it is less dense and weighs less. True or False

False. Salt water causes more buoyancy than fresh water because it is more dense and weighs more; buoyancy results from the weight of water displaced.

My SPG is always part of my dive computer. True or False

False. Your SPG may be an independent instrument or it may be integrated into your dive computer.

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 these cylinders? Yes or No

No, at least not until you are a PADI Open Water Diver and a PADI Enriched Air Diver

What is the pressure, volume, and density at a depth of 10m/33ft?

Pressure: 2 bar/ata Volume: 1/2 Density: x2

What is the pressure, volume, and density at a depth of 30m/99ft?

Pressure: 4 bar/ata Volume: 1/4 Density: x4

What is the pressure, volume, and density at a depth of 40m/132ft?

Pressure: 5 bar/ata Volume: 1/5 Density: x5

Buoyancy is a force that pushes an object in water upward. True or False.

True

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

True

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 or False

True

Failure to follow the most important rule in scuba diving can cause serious lung over expansion (lung rupture) injuries, which in turn can cause paralysis and death. True or False

True

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 or False.

True

Fins provide a large surface area so my legs can push against the water effectively. True or False

True

Getting the service my gear needs may be consideration when choosing equipment. True or False

True

I equalize gently because an extended, forceful equalization can cause permanent damage to my ears and hearing. True or False

True

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

True

I should not dive with a cold, nor use medications to dive with a cold. True or Flase

True

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

True

It is important to master buoyancy control because it affects almost everything I do in and underwater. True or False

True

It is important to master buoyancy control because it allows me to control whether I descend, float or am neutrally buoyant. I adjust my buoyancy frequently while diving. True or False

True

My BCD should have adequate capacity to easily float my equipment and me at the surface. True or False

True

My body responds to anxiety with increased breathing, but slow breathing helps reduce anxiety. True or False

True

My local dive pro will usually set up my regulator components. True or False

True

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

True

Regulators need periodic overhauls, typically every year to two years. True or False

True

Snorkels are standard equipment for scuba diving because they allow me to 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 or False

True

Some scuba divers prefer a snorkel with a flexible lower portion so it drops out of the way when not in use. True or False.

True

The LPI mechanism inflates the BCD with air from my scuba cylinder. True or False

True

The three overall benefits of the buddy system are practicality, safety, and fun. True or False

True

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 or False

True

When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure. True or False.

True

My buddy is rinsing a BCD and partially fills the bladder with water. Is this consistent with recommended BCD care? Yes or No

Yes

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

a) 1 bar/ata

Equalization is the process of: a) adding air to an air space b) removing air from an airspace c) reducing the surrounding pressure d)Increasing the surrounding pressure

a) adding air to an air space

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

a) blade size

As I descend, I need to equalize air spaces. which of the following are accepted ways of equalizing my ears? a) block my nose and attempt to gently blow through it b) swallow and wiggle my jaw from side to side c) block my nose and blow forcefully for an extended period

a) block my nose and attempt to gently blow through it b) swallow and wiggle my jaw from side to side

The most important role in scuba diving is: a) breathe continuously and never hold my breath b) always dive with a buddy c) keep my mask on while in the water, even at the surface d) check my SPG at least every couple of minutes

a) breathe continuously and never hold my breath

Which of the following are among the breathing rules I follow as a diver? (Choose all that apply): a) breathe continuously and never, ever hold my breath b) breathe deeply and slowly 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

a) breathe continuously and never, ever hold my breath b) breathe deeply and slowly 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

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

a) distribution

I should equalize: a) early and often, before I feel discomfort b) when I begin to feel discomfort c) only if I experience pain

a) early and often, before I feel discomfort

The most important consideration when choosing a regulator is: a) ease of breathing b) color c) dive/pre-dive switch d) adjustable second stage

a) ease of breathing

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

a) equalize the mask

As you descend in water the pressure a) increases b) decreases c) does not change

a) increases

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

a) inspect

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

a) mask b) ears c) sinuses

PADI course are performance-based. 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

a) meet specific performance requirements

My sunglasses 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. a) positively b) negatively c) neutrally

a) positively

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

a) practicality b) safety c) fun

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 meters/60 feet18 meters/60 feet c) 30 meters/100 feet d) 40 meters/130 feet

b) 18 meters/60 feet18 meters/60 feet

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

b) a pressure imbalance between the surrounding pressure and an air space

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

b) breathe continuously and never hold your breath

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

b) 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 valve b) burst disk c) cylinder alloy

b) burst disk

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

b) can help you adjust your trim

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

b) fit snugly but not restricted breathing when fully inflated

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

b) increases slightly

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

b) my eyes must be in air to focus

When my snorkel is in my mouth, the tip should be: a) above my head b) over the crown of my head c) at the base of my skull

b) over the crown of my head

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

b) quick release

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

b) secures in the triangle formed by my hips and chin

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

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

If I feel discomfort in a body air space while ascending, the correct action is to: a. Continue my ascent while blowing against blocked nostrils b. Stop, descend slightly and give trapped air time to work its way out. c. Descend at least 10metres/33feet, then resume my ascent

b. Stop, descend slightly and give trapped air time to work its way out.

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

c) above my ears, over the crown of my head

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 and discomfort d) when I reach the bottom

c) before I feel pain and 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

c) between independence and simplicity

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 time as I descend c) cancel the dive until I'm well

c) cancel the dive until I'm well

When I descend, my buoyancy tends to _______. When I ascend, it needs to _______. a) increase, increase b) increase, decrease c) decease, increase d) decrease, decrease

c) decease, increase

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

c) deeply and slowly

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

c) every 2-5 years, annually

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

c) faster than

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 rack

c) secure the cylinder in rack

The density of air if you take 6 liters of air from the surface to 20 meters/66 feet would be _______ he density at the surface. a) one-third b) one-half c) three times d) four times

c) three times

During a dive, I swim hard to keep up with the fish that interests me, but shortly I begin to feel like I can't get enough air. The correct action would be to: a. Signal my buddy and head up to the surface b. Use the regulator purge button to boost air flow c. Stop all activity and rest to restore proper deep, slow breathing

c. Stop all activity and rest to restore proper deep, slow breathing

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

d) BCD

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

d) adjustable and full-foot

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

d) comfort

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

d) only by reputable scuba air stations