Knowledge Review 4

Question 1

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

Answer 1

B) Carry the bag in our hands

Question 2

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.

Answer 2

False

Question 3

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

Answer 3

True

Question 4

Before diving, I should refrain from using:
A) Alcohol
B) Tobacco

Answer 4

A) Alcohol

B) Tobacco

Question 5

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.

Answer 5

True

Question 6

It is recommended that pregnant women do not dive.

True or False

Answer 6

True

Question 7

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

Answer 7

B) six months

Question 8

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

Answer 8

True

Question 9

During a dive, I begin to have a headache, feel ill and dizzy. Are these possible symptoms of contaminated air?
Yes or No

Answer 9

Yes

Question 10

To avoid contaminated air, I should have my cylinder filled only at reputable scuba air sources.
True or False

Answer 10

True

Question 11

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

Answer 11

A) depth, time

Question 12

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

Answer 12

True

Question 13

After a dive, a diver has numbness, tingling, and weakness in the arms. Are these possible signs/symptoms of DCS?
Yes or No

Answer 13

Yes

Question 14

Secondary factors thought to contribute to DCS include:
A) age
B) cold
C) injuries
D) poor fitness/high body fat

Answer 14

A) age
B) cold
C) injuries
D) poor fitness/high body fat

Question 15

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

Answer 15

C) at any time during

Question 16

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

Answer 16

B) shorter

Question 17

Exceeding my computer or table’s ascent rate may increase my risk of DCS.
True or False

Answer 17

True

Question 18

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

Answer 18

B) shorter than

Question 19

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

Answer 19

True

Question 20

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

Answer 20

True

Question 21

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

Answer 21

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

Question 22

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

Answer 22

B) ascend, make a safety stop, and end the dive

Question 23

One reason it is important to have environmentally friendly dive skills is to preserve the natural beauty for other divers.
True or False

Answer 23

True