PADI

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

15 meters/50 feet

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.

18

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 _____.

18 meters/60 feet | 40 meters/130 feet

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 meters/66 feet breathing normally?

20 minutes

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

A cold, allergy or another medical problem

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

Ascend (go up) to a shallower depth

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 _____.

Ascend (go up), make a safety stop and end the dive

Although it shouldn't have happened, on a dive I fail to watch my SPG and run out of air. If my buddy is close by, my best option is to _____. Another option is to _____, if I'm in shallow and the surface is closer than my buddy.

Ascend using my buddy's alternate air source/Make a controlled emergency swimming ascent

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 meters/33 feet. The air space would _____.

Become half the size it was at the surface

If I think I have decompression sickness, I should _____.

Breathe 100% oxygen and contact emergency medical care

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

Compress (feel thinner) from water pressure, and I will lose buoyancy and warmth

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

Dive against or into the current.

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

Dive while tired, cold, sick, thirsty or injured

When making computer assisted dives _____.

Each diver needs a personal computer

A regulator _____ is the part that connects to your scuba cylinder and a regulator _____ is the part you place in your mouth and use to breathe.

First stage/Second stage

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

Float

I know I am properly weighted for diving if I _____.

Float at eye level while holding a normal breath of air and with an empty BCD

If I accidentally exceed my computer's no stop limits, I should _____.

Follow the computer's instructions for decompression

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

Have threaded openings to screw the regulator into

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

Hold the regulator without sealing my mouth around the mouthpiece and "sip" the air as I need as I ascend (go up)

Lung over-expansion injuries can be caused by _____.

Holding my breath while scuba diving

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

I am feeling a squeeze and need to equalize

When diving at an altitude above 300 meters/1000 feet, _____.

I need to follow special procedures and may need to set my computer for the altitude

If I'm diving in cold water or under strenuous conditions _____.

I should add an extra safety margin and stay well within my computer's limits

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

In midwater

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

In the triangle area formed by my chin and the lower corners of my rib cage

It's important that I do not turn off a dive computer between dives because _____.

It would lose memory of the previous dive and not calculate repetitive dives correctly

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

Keep some air in it.

When you look at things underwater, they often seem _____ than when you look at them on the surface.

Nearer and larger

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

Once a year

The first step in using my dive computer is _____.

Reading the manufacturer's instructions

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 _____.

Reduce the risk of breathing contaminated air.

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

Search for a minute and then go up to reunite with my buddy at the surface

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 _____.

Showing signs of distress (trouble)

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

Stop all activity and rest, holding onto something for support if possible

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

Switch to my buddy's alternate air source

If 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?

The balloon will get smaller and the air inside the balloon will be more dense (molecules move closer together).

When planning a dive with a computer, I use the "plan" or "no stop scroll" mode to determine _____.

The maximum allowable time limits for depths (typically in 3 meter/10 foot increments)

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 _____.

To check if the diver is breathing

Most injuries cause by aquatic animals happen because the animals are _____.

Trying to defend themselves

What the bottom is made of can cause big changes in _____.

Visibility

Sound travels faster in water and it is difficult to tell _____.

Where the sound is coming from