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WorksheetsSCUBA Open Water Test Practice
Total questions: 50
Worksheet time: 58mins
Name
Class
Date
1.
You should not dive when:
a)
You are congested.
b)
You are feeling unwell.
c)
Your mind is impaired.
d)
All of them.
2.
The three main types of BCs are ________, ________, and ________.
a)
back flotation, vest style, and horseshoe rings.
b)
horse collars, life preserver rings, and inflatable rafts.
c)
water wings, ankle pillows, and waist rings.
d)
jacket style, back flotation, and horse collars.
3.
The two types of metal used to make scuba cylinders are
a)
Chrome and Copper
b)
Aluminum and Iron
c)
Steel and Silver
d)
Aluminum and Steel
4.
A Scuba cylinder should be filled with:
a)
Filtered air only
b)
Nitrogen, oxygen, carbon dDioxide
c)
Pure oxygen only
d)
Helium, oxygen and filtered air
5.
Scuba cylinders must have hydrostatic testing done a minimum of every ________ years.
a)
5 years
b)
2 years
c)
4 years
d)
year
6.
Scuba cylinders need to be visually inspected internally at least every ________.
a)
5 years
b)
2 years
c)
year
d)
10 years
7.
A _________ calculates your remaining allowable bottom time while diving.
a)
secret diver technology
b)
submersible calculator
c)
SCUBA watch
d)
dive computer and / or submersible pressure gage
8.
Proper maintenance of instruments includes ________ and ________.
a)
rinsing after each diving day, having them serviced once per year
b)
dish soap, filtered water rinses.
c)
oil checks, visual inspections.
d)
visual inspections, and certified inspections.
9.
The three main types of BCs are ________, ________, and ________.
a)
vest style, water wings, and horseshoe waist belt.
b)
back floatation, life jacket style, and weight belt.
c)
jacket style, back flotation, and horse collars.
d)
safety ring, jacket style, and horse collars.
10.
Why should you rinse the inside of your BC?
a)
So it's not sticky next time you use it.
b)
To remove salt crystals and to prevent damage to the inside of your BC.
c)
So it will stay soft and pliable.
d)
To make sure little animals that got in there are re-released into the water.
11.
The two essential features found on all BCs are ________ and ________.
a)
flotation pockets, release valve.
b)
oral inflator, release valve.
c)
velco sealed pockets for keys, weight pockets.
d)
overinflation valve, oral inflator.
12.
What is the most likely use for a dive knife underwater?
a)
To cut off weight belt in case of emergency.
b)
To cut line underwater.
c)
Self-defense against aggressive animals.
d)
Cut long hair in case of tangle.
13.
When you fly a dive flag, you must ________ and ________.
a)
dive near the flag, only display the flag when divers are in the water.
b)
be in a boat traffic area, have at least one diver in the water.
c)
display the flag when divers are in the water, and have an emergency.
d)
have an active emergency and want Coast Guard assistance.
14.
You should record all dives in your logbook because ________ and ________.
a)
you'll need it for certifications, to keep your liscence active.
b)
to rent equipment, to prove your certification hasn't expiered.
c)
you might be required to provide proof of experience, documentation of experience for leadership training.
d)
Navy Seals need it, the FAA likes it too.
15.
A scuba cylinder valve is turned on when you rotate it in a ________ direction?
a)
clockwise
b)
right
c)
counterclockwise
d)
left
16.
Give one example of when it is appropriate to use a giant stride.
a)
Entering water from the beach.
b)
Stepping off a cliff.
c)
Diving off a boat with a platform.
d)
Jumping from a helicopter.
17.
Four major factors that affect your buoyancy are ________, ________, ________, and ________.
a)
weight you wear, air in your BC, air in your lungs, objects you are carrying, type of diving suit, and air in your cylinder.
b)
air in your lungs, what you ate for breakfast, total body mass index, and water you drank in the last 24 hours.
c)
BC inflation, dive suit style, air in your tank, and fin type.
d)
bone density, fat to muscle ratio, BC inflation, and weight belt.
18.
You should ________ whenever your regulator is out of your mouth.
a)
Sing
b)
Hum
c)
Blow tiny bubbles.
d)
Count in even numbers.
19.
What are three steps you should take to prepare for a descent?
a)
Scan the horizon, check your regulator, deflate your BC.
b)
Clear a path in a circle, locate your buddy, pull your arms over your head.
c)
Take equipment readings, note the time your head leaves the surface, deflate your BC.
d)
Exchange snorkel for regulator, note time that your head leaves the surface, deflate your BC, equalize your ears, and exhale.
20.
On ascent, as the air in your BC or drysuit starts to expand, you must ________.
a)
look up
b)
breathe
c)
check your regulator
d)
vent the air
21.
When is it appropriate to choose a buoyant emergency ascent?
a)
never
b)
when no source of air is available and you are deeper than 40 feet
c)
when no source of air is available and you are less than 30 feet deep
d)
when you can't find your buddy
22.
The four ways of communicating under water are ________, ________, ________, and ________.
a)
waving, blinking, dancing, and tank tapping.
b)
ASL, touch, high pitched squeaks and pointing.
c)
blinking, ASL, tank tapping, or touch.
d)
hand signals, slate, tank tapping, and touch.
23.
The nitrogen in the air breathed at any depth:
a)
Has an effect on the divers ability to process oyxgen.
b)
Effects the diver’s respitory system.
c)
Is absorbed into body tissues.
d)
Has no effect on the diver.
24.
The steps to the recommended lost buddy plan are:
a)
tap on your tank and scan above and below
b)
Get vertical, do a 360 degree turn, look for your buddy bubbles, rise about ten feet, do another 360 degree turn looking for buddy bubbles, ascend slowly to the surface, note your position, return the shore, and wait.
c)
rise ten feet and look for bubbles
d)
ascend to the surface and scan below
25.
Air is approximately ________ oxygen and 78% ________.
a)
47%, nitrogen
b)
20.9%, nitrogen
c)
87.7%, glycerine
d)
14.7% and hydrogen
26.
Water is ____ denser at 99 feet than it is at 10 feet.
a)
much
b)
eight times
c)
thee times
d)
not
27.
One atmosphere of pressure is equal to about ________ meters (________ feet) of fresh water or ________ meters (________feet) of seawater
a)
10.3, 34; 10, 33
b)
9.9, 48; 7, 24
c)
13.99, 22: 3, 89
d)
14.7, 30; 12, 30
28.
The pressure is ________ greater at 40 meters (132 feet) in salt water than it is at the surface.
a)
5 times
b)
6 times
c)
3 times
d)
2 times
29.
Lung expansion injuries are caused by ________ or _______
a)
holding your breath, breathing too deep
b)
blowing bubbles, holding your breath
c)
holding your breath, not breathing properly
d)
holding your breath, a panic attack
30.
Sound travels about _______ in water than in air.
a)
2 times slower
b)
4 times slower
c)
4 times faster
d)
2 times faster
31.
Diving with too much weight on your weight belt is OK, just use a larger BC.
a)
True, the BC will provide lift to overcome the weight belt.
b)
False, basic divers should be neutral at the surface.
c)
True, the divers trim is much better.
d)
False, the diver needs to have positive buoyancy at depth.
32.
Two fully equipped scuba divers descend to 55 feet and remain at that depth for the entire dive. What state of buoyancy best allows them to do this?
a)
Negative
b)
Static
c)
Positive
d)
Neutral
33.
Breath holding while scuba diving can cause:
a)
collapsed lung or gas embolism
b)
hallucinaitons
c)
blindness
d)
numbness
34.
To maintain neutral buoyancy during descent, a diver should:
a)
Remove lead weights from the belt.
b)
Eat lots of beans the night before and release gas when needed.
c)
Add lead weights to the belt.
d)
Add air to the BC.
35.
Which of the following DOES NOT affect buoyancy?
a)
The divers breathing patterns.
b)
The divers surface air consumption rate.
c)
The amount of weight worn on the belt.
d)
The divers depth.
36.
A proper breathing pattern for a scuba diver should be:
a)
Just like you do on land.
b)
Faster and shallower than normal.
c)
Faster than normal.
d)
Slower and deeper than normal.
37.
One atmosphere of pressure is equaled to ______ feet of salt water.
a)
7.38762 ft.
b)
33 ft.
c)
30.2 ft.
d)
34 ft.
38.
What is the total pressure exerted on a diver in 99 feet of sea water?
a)
2 atmospheres absolute
b)
6 asmospheres absolute
c)
4 atmospheres absolute
d)
1.8 atmospheres absolute
39.
The greatest pressure change occurs between:
a)
0 ft. and 15 ft.
b)
0 ft. and 30 ft.
c)
30 ft. and 45 ft.
d)
45 ft. and 65 ft.
40.
The effects of nitrogen narcosis can be relieved by:
a)
Buddy breathing using an octopus regulator.
b)
Resting and breathing oxygen after each dive.
c)
Slowly ascending to a shallower depth.
d)
Going to a decompression chamber.
41.
You should begin to equalize your ears as soon as you feel pain.
a)
True, to ascend further will cause ear problems.
b)
False, equalize early and often before you feel pain.
c)
False, pain in your ears while SCUBA diving is normal.
d)
True, the discomfort and pain is the signal to equalize your ears.
42.
What causes bubble formation in the blood during ascent?
a)
The 80% Nitrogen breathed in the air at the surface.
b)
Ascending without venting the BC.
c)
Ascending slower that 30 feet minute.
d)
Ascending faster than 30 feet per minute.
43.
A diver who ignores minor ear pain while descending risks:
a)
A ruptured eardrum.
b)
Permanent hearing loss.
c)
Ruptured ear drum AND Hearing loss.
d)
There is no risk, minor ear pain is normal.
44.
Depth has a significant effect on air consumption.
a)
True, the diver uses more air at depth than at the surface.
b)
False, the divers air consumption depends on the size of the tank.
c)
True, the diver will use less air at depth than at the surface.
d)
False, air consumption is the same at every depth.
45.
Almost all injuries from aquatic animals are caused by the _________ actions on the part the diver.
a)
Planned
b)
Offensive
c)
Agressive
d)
Defensive
46.
Diving buddy teams should always:
a)
Agree on a leader and have a lost buddy plan.
b)
Wear matching equipment.
c)
Log their dives in a diving log.
d)
Have the same certification.
47.
One of the most important things to remember about SCUBA diving is:
a)
Feeding fish is like feeding chipmunks in National parks.
b)
How challenging it is to get in and out of your wet suit.
c)
Never hold your breath.
d)
Stay hydrated.
48.
If you are not feeling well but medication removes your symptoms, you should not because
a)
some medications cause drowsiness making driving or operating heavy equipment dangerous.
b)
muddled thinking is a recipe for success.
c)
risky behavior results in long-term rewards.
d)
medication only masks the symptoms of your illness, it does not cure illness. The illness will affect your physiology underwater and could be hazardous.
49.
What is the correct equasion for calculating surface air concymption tate (SAC) at sea water depth?
a)
You don't use SAC to calculate but RMV instead.
b)
Use a dive computer or watch to determine the total dive time in minutes.
c)
Tank Volume in Cubic Feet ÷ Working Pressure in PSI = Tank Conversion Factor
d)
Imperial SAC Rate Formula:[ {(PSI Start - PSI End) x 33} ÷ (Depth + 33)] ÷ Time in Minutes = SAC Rate in PSI/min
50.
What is Residual Nitrogen?
a)
Residue of nitrogen left in a scuba cylender.
b)
Excess nitrogen remains in body tissues after diving.
c)
Nitrogen that must be mixed with air.
d)
The last 500 lbs of air in the tank used for safety
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