Section 1

A depth change of 10meters/33 feet causes a pressure change of:

1 bar/ata

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

2

Identify the following components:

Alternate air source, SPG/computer, first stage, primary second stage Check Pg. 59

To control my buoyancy, normally I will use my weight system and my:

BCD

I should equalize:

Before I feel pain or discomfort.

As I descend, I need to equalize air spaces. Which of the following are accepted way if equalizing my ears?

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

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

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

The most important rule in scuba diving is:

Breathe continuously and never hold my breath.

The ______ is a safety device that relieves accidental overpressure by releasing air before reaching 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.

When I descend, my buoyancy tends to ________. When I ascend, it tends to _______.

Decrease, increase

Complete a depth-pressure-air volume-air density table:

Depth: Pressure: Volume: Density: 0m/0ft. 1bar/ata. 1. x1 10m/33ft. 2bar/ata. 1/2. x2 30m/99ft. 4bar/ata. 1/4 x4 40m/132ft. 5bar/ata. 1/5. x5

My mask encloses my nose so I can:

Equalize the mask

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

False

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

False

My SPG is always part of my dive computer.

False

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

False

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

False

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

False

An object that is neutrally buoyant in fresh water will _________ in salt water.

Float

I'm planning to dive the following week and am checking my gear. I put my kit together and notice that my regulator seems to breathe harder than I remember. The appropriate action would be to:

Have it inspected and serviced as needed by a professional before using it.

I need a mask because:

My eyes must be in air to focus.

I'm renting a higher working 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 instructed supervision, I am qualified to use one of these cylinders?

No

Identify the four systems that make up a scuba kit.

Regulator, cylinder, weight system, and BCD Check pg. 50

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:

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

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

Stop my descend and signal my buddy/ the instructor.

During a descent, I try to equalize but discover I'm having trouble doing so. Which of the following is correct?

Stop my descent, signal my buddy, ascend slightly and try again.

If I feel discomfort in a body air space while ascending, the correct action is to:

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

The primary considerations when choosing any piece of scuba gear are:

Suitability, Fit, and Comfort

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

True

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

True

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

True

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

True

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

True

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

True

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

True

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

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 frequency while diving.

True

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

True

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

True

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

True

Regulators need periodic overhauls typically every year to two years.

True

Snorkles 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

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

True

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

True

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

True

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

True

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?

Yes

A squeeze is caused by:

a pressure imbalance between the surrounding pressure and an air space.

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 __________ fins

adjustable and full-foot

When choosing an alternate air source, a primary consideration involves deciding:

between independence and simplicity.

My primary considerations when choosing fins are fit and:

blade size

A balloon fully inflated and sealed at 10 meters/33 feet, would probably ______ during the ascent to the surface.

burst

Accessory weights:

can help you adjust your trim.

The three most important considerations in choosing scuba equipment are suitability, fit, and:

comfort

The most efficient way to breath dense air underwater is to breath:

deeply and slowly

Trim means having the right _____ of weight

distribution

I should equalize:

early and often, before I feel discomfort.

The most important consideration when choosing a regulator is:

ease of breathing

scuba cylinders require pressure testing _______, and visual inspection _________

every 2-5 years, annually

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 BCD should fit:

fit snugly but not restrict breathing when fully inflated.

As you descend in water the pressure:

increases

Underwater when I inhale, my buoyancy:

increases slightly

Before each use I should ________ my equipment

inspect

As I descend, increasing pressure affects my:

mask, ears, sinuses

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 pocket into the water, but fortunately, it floats so I retrieve it. I would say sunglasses case is ____________ buoyant.

positively

Overall benefits of the buddy system include:

practicality, safety and fun

The most important feature in my weight system is its:

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.

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

shorter than

During ascent I feel discomfort in my ears. I should:

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 at the surface.

three times

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

true