Underwater objects appear:
a) larger and/or closer
b) smaller and/or more distant
c) the same as they do in air - correct answer a) larger and/or closer
My buddy has a bright red shoulder patch on his wet suit. If we're diving together in very cl...
PADI - Section 2
Underwater objects appear:
a) larger and/or closer
b) smaller and/or more distant
c) the same as they do in air - correct answer a) larger and/or closer
My buddy has a bright red shoulder patch on his wet suit. If we're diving together in very clear water on a sunny day, at 12 meters/40 feet I would expect the patch to appear:
a) a more vivid red
b) less red than at the surface
c) blue - correct answer b) less red than at the surface
While my buddy and I are diving, a motorboat passes by about 300 meters/yards away. Which of the following statements is true?
a) it will sound farther away (quieter) than in air.
b) I may have difficulty determining where the boat is based on the sound
c) it will sound like it is straight below me - correct answer b) I may have difficulty determining where the boat is based on the sound
Because water is denser than air, it takes more effort to move through water.
True or False - correct answer True
To move efficiently as a diver, I should move:
a) quickly and steadily
b) quickly and sporadically
c) slowly and steadily
d) slowly and sporadically - correct answer c) slowly and steadily Streamlining benefits me as a diver because it reduces drag, which helps me save energy.
True or False - correct answer True
Trim is important for streamlining because:
a) poor trim raises and lowers my feet, causing drag
b) it means I have the correct amount of weight - correct answer a) poor trim raises and lowers my feet, causing drag
Water's density works best for me when I use the skill of:
a) shallow, rapid breathing
b) clearing water from my mask
c) equalizing my ears, sinuses and mask
d) controlling my buoyancy - correct answer d) controlling my buoyancy
I chill faster in water than in air of the same temperature because water absorbs more heat than air does.
True or False - correct answer True
To stay comfortably warm during a dive, I:
a) wear an appropriate exposure suit
b) never dive in water colder than 24C/75F - correct answer a) wear an appropriate exposure suit
After 30 minutes underwater, I start to feel a bit too cool and uncomfortable. I should:
a) increase my activity
b) keep my arms by my sides
c) end the dive immediately, dry off and seek warmth - correct answer c) end the dive immediately, dry off and seek warmth
While scuba diving, I should breathe:
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