Knowledge Review 4 Flashcards
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
I have a bit of a cold but I feel I can manage the dive well enough, so it is okay to dive.
True or False.
False
Exertion from swimming hard, carrying equipment, climbing a ladder, long walks wearing gear, and heat stress from wearing an exposure suit in a hot climate can lead to a heart attack in predisposed individuals. These factors can also cause problems for people with other cardiovascular conditions.
True or False
True
Before diving, I should refrain from using:
A) Alcohol
B) Tobacco
A) Alcohol
B) Tobacco
Medications can create problems when diving, so I should use prescription drugs and over-the-counter medications with caution. Any drug that affects my judgment, thinking and/or reactions should generally not be used before diving.
True or False.
True
It is recommended that pregnant women do not dive.
True or False
True
As a new PADI Open Water Diver, I should refresh my dive skills with a PADI Scuba Review after \_\_\_\_\_\_ of inactivity. A) one month B) six months C) one year D) five years
B) six months
One reason it is important to be certified as a PADI Enriched Air Diver, or under the supervision of a PADI Enriched Air Instructor, before using enriched air nitrox is to avoid oxygen toxicity problems.
True or False
True
During a dive, I begin to have a headache, feel ill and dizzy. Are these possible symptoms of contaminated air?
Yes or No
Yes
To avoid contaminated air, I should have my cylinder filled only at reputable scuba air sources.
True or 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 or 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: A) age B) cold C) injuries D) poor fitness/high body fat
A) age
B) cold
C) injuries
D) poor fitness/high body fat
A no stop dive means I can, ______ the dive, ascend directly to the surface without stopping if necessary (although I would normally plan a safety stop).
A) for the first half of
B) for the last half of
C) at any time during
C) at any time during
If I am planning a dive to 12 metres/40 feet, my no stop limit will be _______ than my no stop limit for a dive to 10 metres/30 feet.
A) longer
B) shorter
B) shorter
Exceeding my computer or table’s ascent rate may increase my risk of DCS.
True or False
True
On a repetitive dive, for a given 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
I must use the same dive computer the entire day of diving, on all dives, and not share it with another diver.
True or False
True
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 or False
True
When diving with a computer, it is recommended that I:
A) dive well within its limits.
B) follow the most conservative computer-mine or my buddy’s
C) start at the deepest point and progress shallower
D) ascend slowly and make a safety stop
A) dive well within its limits
B) follow the most conservative computer-mine or my buddy’s
C) start at the deepest point and progress shallower
D) ascend slowly and make a safety stop
During a dive, my dive computer fails, and I’m 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 duration we planned before the dive
B) ascend, make a safety stop, and end the dive
One reason it is important to have environmentally friendly dive skills is to preserve the natural beauty for other divers.
True or False
True
