Exam A

If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water would

I blow up a balloon, tie it off, and take it to the bottom of the swimming pool. What will happen to the balloon and the air inside it?

I turn a glass upside down, trap the air in it by putting it in water, and then I take the glass down to 10 metres/33 feet. The air space would

If I am not able to equalize (clear) my body air spaces, it may be because I have

If my ears or sinuses hurt while I am descending (going down), it usually means

The best place for me to position an alternate air source is:

Lung overexpansion injuries can be caused by

If my cylinder of air lasts 60 minutes while I am at the surface breathing normally, assuming all else is the same, how long will it last at 20 metres/66 feet breathing normally?

How often should I take my scuba cylinder to be visually inspected by my dive center?

The difference between DIN valves and yoke valves is that DIN valves

Which of the following is part of proper care for my scuba cylinder?

When I look at things underwater they often seem _________ than they look on the surface.

____________ travels faster in water than it does in air. This is why you cannot easily tell where it comes from.

Unless there are laws that say differently, I should stay within _______ of my dive flag.

If I work too hard and find it difficult to breathe underwater, I should

As I descend (go down), my wet suit will

I know I am properly weighted for diving if I

If I were separated from my buddy the general procedure is to

I am most likely to become confused about which way is up or down _________.

I feel a mild current at the start of my dive. How should I begin this dive?

What the bottom is made of can cause big changes in

Most injuries caused by aquatic animals happen because the animals are

A diver at the surface is moving quickly and jerkily, has the mask off the face, the regulator/snorkel is out of the mouth, and the diver does not respond to directions. The diver is

I am close to my buddy and realize I am out of air. The best response is to

If my regulator begins to free flow (release air continuously) while underwater, I should

Buoyant emergency ascent – dropping my weight system

Controlled emergency swimming ascent (CESA) – swimming up to the surface making a continuous sound (like ah-h-h-h)

Normal ascent – going up normally

Alternate air source ascent – using my buddy’s alternate air source

There is an injured diver who is out of the water and is not responding to touch or my voice. The first thing to do would be

I should have cylinders filled at a dive center I trust, not use air that tastes or smells bad, nor use air from a compressor designed to fill car tires. This is important to

Divers who act foolishly at depth due to gas narcosis may start acting normally again if they

I am likely to increase the risk of decompression sickness (DCS) if I

If I think I have decompression sickness I should

The first step in using my dive computer is

When planning a dive with a computer, I use the “plan” or “no stop scroll” mode to determine:

When making computer assisted dives

It’s important that I do not turn off a dive computer between dives because

If I accidentally exceed my computer’s no stop limits, I should

If I’m diving in cold water or under strenuous conditions

If my computer fails during a dive, I can use my backup computer to continue the dive. If I’m not wearing a backup, I should

I make two dives in one day and am flying home on a commercial plane. I should wait until my computer says I can fly or ________ hours, whichever is longer.

As a new PADI Open Water Diver, the recommended maximum depth is ______________, or the actual depth I reached in training, if shallower. The maximum depth for all recreational scuba divers, even experienced divers, is ______________.

When diving at an altitude above 300 metres/1000 feet

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