Section 4 Flashcards
for an underwater naturalist dive, I want to carry several small slates and some measuring tools. a mesh utility bag may be an appropriate way to do this
true/false
true
mesh bags range in size and options. I would probably choose a larger one for carrying a wet exposure suit
true/false
true
during an underwater cleanup, my buddy and I fill a large mesh utility bag with several kilograms/pounds of garbage. we should
a. attach the bag to our gear
b. carry the bag in our hands
b. carry the bag in our hands
which of the following are purposes for which I would carry a slate or wet book? (choose all that apply)
a. communication
b. noting limits and backup information
c. recording information
d. the unexpected
all of them
when choosing a slate, the main option I usually consider is
a. weight
b. size
c. color
d. pencil type
b. size
one use of a dive light is to look into holes and cracks where shy organisms may hide during the day
true/false
true
wide beams of light tend to be ____ dive lights
a. compact
b. larger
c. rechargeable battery
d. disposable battery
b larger
I log my dives (choose all that apply)
a. to document training
b. as a reference tool
c. to share information
d. keep related information
all of them
the minimum information I would typically log includes (choose all that apply)
a. dive site name
b. the depth
c. dive time
d. my buddy’s name
all of them
dive planning software can help me estimate and plan (choose all that apply)
a. my air use
b. computer dive time
c. the water temperature
a, b
my air use, computer dive time
I can choose from very basic software intended only for planning recreational dives, as well as software designed for much more complex diving
true/false
true
a spare parts kit contains
a. user-replaceable items
b. parts that require professional installation
a. user-replaceable items
which of the following might I have in a spare parts kit? (choose all that apply)
a. spare mask strap, fin straps
b. harness/weight belt buckle
c. cable (pull) ties
d. adjustable wrench (spanner), pliers, screw drivers, hex wrenches (allen keys)
e. regulator mouthpiece
f. accessory clip
g. various sized cylinder valve/DIN valve o-rings
all of them
diving can be physical demanding, s I should be in god health and reasonably fit
true/false
true
it is recommended that I have a complete physical examination when I start diving and regularly thereafter
true/false
true
factors that can strain my heart in diving include (choose all that apply)
a. swimming hard
b. carrying equipment
c. climbing a ladder
d. heat stress
all of them
if I may be predisposed to heart disease, I should consult my doctor so I can assess and manage the risk as a diver
true/false
true
before diving, I should refrain using ____ and ____. (choose two)
a. alcohol
b. prescription drugs
c. seasickness medication
d. tobacco
a, d
alcohol, tobacco
before using prescribed or over-the-counter medication, if I am not sure how they will affect me diving, I should consult my physician
true/false
true
the best way to keep my dive knowledge and skills current and refreshed is to
a. visit online scuba forums
b. join a dive club
c. use them by diving regularly
c. use them by diving regularly
as a new PADI Open Water Diver, I should refresh my dive skills with a PADI ReActivate after ____ of inactivity
a. one month
b. six months
c. one year
d. five years
b. six months
continuing my diver education helps keep my skills and knowledge sharp by (choose all that apply)
a. allowing me to visit new dive sites
b. increasing my opportunities to dive
c. expanding the types of diving I do
d. introducing me to new buddies I can dive with
all of them
for practical purposes, air consists of oxygen and
a. helium
b. hydrogen
c. argon
d. nitrogen
d. nitrogen
for practical purposes, air is ____ percent oxygen
a. 11
b. 21
c. 51
d. 100
b. 21
which of the following issues relate to the component gases of air? (choose all that apply)
a. equalization
b. lung overexpansion
c. buoyancy changes with depth
d. oxygen issues
d. oxygen issues
if I dive within recreational limits using air, I avoid the problems associated with oxygen being toxic or causing fire/combustion issues
true/false
true
as a PADI Open Water Diver, I should not dive with a cylinder labeled “oxygen” or known to have 100 percent oxygen
true/false
true
enriched air nitrox can have oxygen issues. to avoid these, I should become qualified to dive with enriched air in the PADI Enriched Air Diver course, or be under the supervision of a PADI Enriched Air Instructor
true/false
true
possible causes of contaminated air in my scuba cylinder include high levels of contaminant in the source gas and
a. chemical reactions in the cylinder
b. using the wrong type of cylinder
c. increasing the amount of oxygen
d. getting it filled at an improper source
d. getting it filled at an improper source
during a dive, I begin to have a headache, feel ill and dizzy. are these possible symptoms of contaminated air?
yes or no
yes
after a dive, my buddy feels ill and has cherry red lips and nail beds. after breathing oxygen, my buddy seems to be doing fine, so n other action is required
true/false
false
the diver should have medical attention in all cases of suspected contaminated air
to avoid contaminated air, I should have my cylinder filled only at reputable scuba air sources
true/false
true
the two primary factors that influence how much nitrogen dissolves into my body tissues during a dive are ____ and ____
a. depth, time
b. temperature, time
c. depth, temperature
a. depth, time
if I exceed established depth and time limits while diving and then surface, bubbles can form in my body tissues, causing decompression sickness
true/false
true
after a dive, a diver has numbness, tingling and weakness in the arms. are these possible signs/symptoms of DCS?
yes or no
yes
secondary factors thought to contribute to DCS include (choose all that apply)
a. age
b. cold
c. injuries
d. poor fitness/high body fat
all of them
dive computers track the amount of theoretical nitrogen in my body by measuring the depth and time throughout the dive
true/false
true
during a dive, my dive computer reads the nitrogen that is actually absorbed by my body
true/false
false
dive computers and tables do not directly access anything going on inside your body
because dive computers and tables cannot account for individual variation, I should dive well within limits and
a. ascend rapidly
b. ascend slowly
c. descend rapidly
d. descend slowly
b. ascend slowly
ascend slowly to equalize but this does not reduce your DCS risk
A no stop dive means I can, if necessary, ascend directly to the surface without stopping ____ the dive
A. For the first half of
B. For the last half of
C. At any time during
C. At any time during
A no stop limit is the maximum time I can spend at a given depth and still ascend directly to the surface
True/false
True
If I stay longer than a no stop limit, I must
A. Ascend directly to the surface
B. Make a safety stop
C. Make an emergency decompression stop
C. Make an emergency decompression stop
If I am planning a dive to 18 m/60 ft, my no stop limits will be ____ than my no stop limits for a dive to 12m/40 ft
A. Longer
B. Shorter
B. Shorter
While at 18 m/60 ft, my computer says I have 40 minutes no stop time remaining. My buddy and I ascend to 10 m/30 ft. Our computers will show our no stop time is
A. Longer
B. Shorter
C. The same
A. Longer
Ascending faster than the required ascent rage of my computer or table may increase my risk of DCS
True/false
True
If I were to skip a(n) ____ stop, I would surface outside model limits and have a high risk of decompression sickness
A. Safety
B. Emergency decompression
B. Emergency decompression
A repetitive dive is a dive made while I still have theoretical residual nitrogen in my body
True/ false
True
On a repetitive dive, for a known depth my no stop limits will be ____ those of the first dive
A. Longer than
B. Shorter than
C. The same as
B. Shorter than
A surface interval is the time it takes to reach the surface
True/false
False
A surface interval is the time you are at the surface between dives
After a surface interval, the nitrogen dissolved in my body will
A. Decline
B. Increase
C. Not change
A. Decline
My dive computer only calculated while I am underwater. It doesn’t do anything between dives
True/false
False
Your dive computer continues to calculate until your theoretical nitrogen levels return to normal
I must use the same dive computer the entire day of diving, on all dives, and not share it with another diver
True/false
True
Dive tables like the RDP and the eRDPml use \_\_\_\_ tables to calculate repetitive dives A. 1 B. 2 C. 3 D. 4
C. 3
Advantages of a dive computer over dive table include dive computers (choose all that apply) A. Are easier to use than tables B. Help offset human error C. Give me more time underwater D. Read the actual nitrogen in my body
A, B, C
Before, during and/or between dives, my computer will tell me (choose all that apply) A. No stop limits B. The ascent rate C. Emergency decompression information D. Previous dive information
All of them
The first step in setting up my dive computer is to A. Set the date B. Put in the battery C. Press the power button D. Read the manufacturer instructions
D. Read the manufacturer instructions
During a dive with my dive computer, my buddy and I will turn the dive based on the first limit we reach: remaining no stop time or air supply turn point
True/false
True
During a dive, my dive computer allows more dive time than my buddy and I planned for a given depth. We have plenty of air, so it’s okay to stay longer or go deeper than we planned
True/false
False
Don’t exceed your planned depth or time just because your computer will let you
During a dive, my dive computer fails and I am not using a backup. I should
A. Continue the dive based on my buddy’s computer
B. Ascend, make a safety stop and end the dive
C. Stay for the time we planned before the dive
B. Ascend, make a safety stop and end the dive
Are divers a significant threat to the overall health of the underwater environment?
Yes or no
No
One reason t is important to apply environmentally friendly dive skills is to preserve the natural beauty for other divers
True/false
True
My influence as a diver and ambassador for the underwater world allows me to be part of the solution to the problems the world’s aquatic ecosystems face
True/false
True
