Section 1 Flashcards
Complete the following depth-pressure-air volume-air density table:
Depth Pressure Volume Density
0m/0ft 1 bar/ata 1 X1
10m/33ft __ bar 1/2 __
30m/99ft __ bar 1/4 __
40m/132ft 5 bar ____ X5
As I descend, I need to equalize air spaces. Which of the following are accepted ways of equalizing my ears?
A) Block my nose & attempt to gently blow through it
B) Swallow & wiggle the jaw from side to side
C) Block my nose & blow forcefully for an extended period
A) Block my nose & attempt to gently blow through it
B) Swallow & wiggle the jaw from side to side
During a descent, I try to equalize but discover I’m having trouble doing so. which of the following is correct?
A. slow my descent, signal my buddy to slow down, and equalize more forcefully
B. stop my descent, signal my buddy, ascend slightly and try again
C. continue my descent while equalizing repeatedly
D. signal my buddy, ascend to the surface and start my descent over
B. stop my descent, signal my buddy, ascend slightly and try again
I should equalize
A. early and often, before I feel discomfort
B. when I begin to feel discomfort
C. only if I experience pain
A. early and often, before I feel discomfort
I should not dive with a cold, nor use medications to dive with a cold
true/false
True
The most important rule in scuba diving is
A. breathe continuously and never hold my breath
B. always dive with a buddy
C. keep my mask on while in the water, even at the surface
D. check my SPG at least every couple of minutes
A. breathe continuously and never hold my breath
Failure to follow the most important rule in scuba diving can cause serious lung overexpansion (lung rupture) injuries, which in turn can cause paralysis and death
true/false
True
if I feel discomfort in a body air space while ascending, the correct action is to
A. continue my ascent while blowing against blocked nostrils
B. stop, descend slightly and give trapped air time to work its way out
C. descend at least 10 m/33 ft, then resume my ascent
B. stop, descend slightly and give trapped air time to work its way out
my buddy and I are planning a dive to 18 m/60 ft. we would expect our air supply to last ____ at 10 m/33 ft, all else being the same
A. longer than
B. shorter than
C. same as
B. shorter than
during a dive, I swim hard to keep up with a fish that interests me, but shortly begin to feel like I can’t get enough air. the correct action would be to
A. signal my buddy and head up to the surface
B. use the regulator purge button to boost air flow
C. stop all activity and rest to restore proper, deep, slow breathing
C. stop all activity and rest to restore proper, deep, slow breathing
an object that is neutrally buoyant in fresh water will ____ in salt water
A. sink
B. float
c. be neutrally buoyant
B. float
the three overall benefits of the buddy system are practicality, safety, and fun
true/false
True
the primary considerations when choosing any piece of scuba gear are
A. suitability
B. brand
C. fit
D. comfort
A, C, D
suitability, fit, comfort
I’m planning to dive the following week and am checking my gear. I put my kit together and notice that my regulator seems to breathe harder than I remember. the appropriate action would be to
A. have it inspected and serviced as needed by a professional before using it
B. go ahead and use it, but limit my dive depth to 10 m/30 ft
c. wash it in fresh water and see if the problem continues
A. have it inspected and serviced as needed by a professional before using it
there is no way to use a DIN regulator on a yoke cylinder valve
true/false
False
