PADI open water diver

a depth change of 10 meters/33 feet causes a pressure chance of

1 bar/ata

if you take 6 liters of air from the surface to 20 meters/66feet, the volume will be

2 litres

to control my buoyancy, normally I will sue my weight system and my

BDC

Overall benefits of the buddy system include: a.practicality b.safety c.fun

a,b,c

I want to adjust my mask so the strap rests _____

above my ears, over the crown of my head

equalization is the process of...

adding air to an air space

the two basic fin styles are _____

adjustable and full-foot

which of the following are among the breathing rules I follow as a diver? a. breathe continuously and never 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 them maintain or restore slow deep breathing

all of the above

I should equalize...

before I feel pain or discomfort

when choosing an alternate air source, a primary consideration involves deciding.....

between simplicity and independence

my primary considerations when choosing fins are the fit and

blade size

a balloon fully inflated and sealed at 10 meters/33 feet, would probably _____ during ascent to the surface

burst

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

burst disk

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

the three most important considerations in choosing scuba equipment are suitability, fit, and _____

comfort

when I descend, my buoyancy tends to _____. When I ascend it tends to _____

decrease, increase

the most efficient way to breathe dense air underwater is to breathe

deeply and slowly

trim means having the right _____ of weight

distribution

the most important consideration when choosing a regulator is

ease of breathing

my mask encloses my nose so I can

equalize the mask

scuba cylinders require pressure testing _____ and visual inspections _____

every 2-5 years, every 2-5 years

a cylinder with a higher working pressure always holds more at than a cylinder with a lower working pressure (T/F)

false, a cylinders capacity depends on both its working pressure and its internal capacity

I should choose a mask that fits as far away from my face as possible (T/f)

false, choose a lot profile that sits as close as possible

Salt water causes more buoyancy than fresh water because it is less dense and weighs less (T/F)

false, salt water causes more buoyancy because it is more dense and weighs more

my SPG is always part of my dive computer (t/f)

false, your SPG may be an independent instrument or it may be integrated into your dive computer

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

faster than

as you descend in water the pressure

increases

Underwater, when I inhale, by buoyancy

increases slightly

Before each use, I should _____ my equipment

inspect

as I descend, increasing pressure affects my

mask,ears, sinuses

I need a mask because

my eyes must be in air to focus

I'm rent ing 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?

no

I should have my scuba cylinder filled _____

only by reputable scuba air stations

when my snorkel is in my mouth the tip should be

over the crown of my head

MY sunglasses case falls out of my pocked into the water but fortunately, it floats so I retrieve it. The case is _____ buoyant.

positively

a squeeze is caused by

pressure imbalance between the surrounding pressure and an air space

the most important feature in my weight system is

quick release

I bring a cylinder aboard a dive boat in preparation for a trip out to a nearby reef. the normal procedure would be to____

secure the cylinder in a rack

when setting up and wearing my kit the alternate air source _____

secures in the triangle formed by my hips and chin

I'm descending and discovering I can't equalize. The first thing I would do is...

stop my descent and signal my buddy/the instructor

I equalize gently because an extended, forceful equalization can cause permanent damage to my ears and hearing (T/F)

true

I must be able to quickly release enough weight to float reliably in an emergency, but not necessarily all my weight (T/F)

true

In recreational diving, the buddy system means diving with another diver or divers in a team that provides assistance and safety benefits (T/F)

true

It is important to master buoyancy control because it affects almost everything I do in and underwater (T/F)

true

My local dive pro will usually set up my regulator components (t/f)

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. (T/F)

true

buoyancy is a force that pushes an object in water upward (T/F)

true

fins provide a large surface area so my legs can push against the water effectively (T/F)

true

getting the service my gear needs may be a consideration when choosing equipment (T/F)

true

my BCD should have adequate capacity to easily flat my equipment and me at the surface (T/F)

true

my body responds to anxiety with increased breathing, but slow breathing helps reduce anxiety (T/F)

true

one reason for wearing more than one weigh system is that it is sometimes easier then handling a single heavier one (T/F)

true

some scuba divers prefer a snorkel with a flexible lower portion so it drops out of the way when not in use (T/F)

true

the LPI mechanism inflates the BCD with air from my tank (T/F)

true

two prepare adjustable fins I should adjust the straps wearing my wet suit boots (T/F)

true

when scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure (T/F)

true