Padi Open Water Chapter 1
Positive Buoyancy - ANSThe tendency of an object to glide or upward thrust in a fluid due to the
fact the item weighs much less than the fluid it displaces
Neutral Buoyancy - ANSA condition in which an object's mass equals the mass it displaces in a
surrounding medium. The object neither sinks nor floats.
Negative Buoyancy - ANSThe tendency of an object to sink in a fluid because the item weighs
extra than the fluid it displaces
What gadget do you use to govern your buoyancy - ANSBCD (buoyancy manage tool) & lead
weights
and additionally your lungs through respiration out (sink) and in (drift)
Salt water weighs greater than clean making you.. - ANSmore buoyant
Why do you normally best sense modifications of stress to your body air areas - ANSYour body
is generally liquid, that's incompressible and distributes pressure equally for the duration of the
body.
Why are stress changes even as ascending or descending underwater a lot more massive than
stress modifications while doing the same in air - ANSWater is tons denser and heavier than air,
stress changes much greater considerably for a given distance ascent or descent.
Air stress at sea degree is - ANSStandard Atmospheric Pressure 1 ata or 1 bar
How many ata/bar do you add for every ten meters you descend underneath water - ANS1
ata/bar for each 10m/33ft you descend
10m/33ft 2 bar/ata
20m/66ft three bar/ata
30m/99ft four bar/ata
What is the relationship between air volume and density - ANSas strain increases extent
decreases:
at 10m/33ft you have got 1/2 extent (2bar)
at 20m/66ft you have got 1/3 volume (3bar)
at 30m/99ft you've got 1/four extent (4bar)
what do you do to preserve air volume as you descend? - ANSyou need to add air to the space
to keep up with the volume discount (equalization)
, in case you added air to a area to maintain its extent whilst below strain what takes place to that
air as the stress decreases - as you ascend - ANSthe air expands
what two air areas should subject you as a diver - ANSears & sinuses
what's squeeze - ANSa pressure imbalance wherein stress outdoor an air space exceeds
pressure inside an air area ensuing in ache or pain (ears, sinuses, lungs, enamel can squeeze)
how will you keep away from discomfort from squeeze - ANSadd air to the space for the
duration of descent (equalization)
lungs automatically equalize as you... - ANSbreathe!
3 approaches to equalize throughout descent - ANS1. Pinch nose and lightly blow
2. Swallow and wiggle jaw facet to facet
three. Swallow, wiggle jaw and blow with nostril pinched
how often ought to you equalize all through descent - ANSevery meter/few ft earlier than you
sense any soreness
what can appear in case you try a forceful equalization or prolonged equalization - ANSruptured
ear drum
what have to you do if you feel pain - ANSascend until the discomfort eases, equalize and
continue a slow descent equalizing more regularly
what in case you can't equalize - ANSdo no longer dive
how do you equalize your mask - ANSblow out via your nose
what can happen if you maintain your breath whilst ascending - ANSthe air to your lungs will
enlarge in quantity and possibly cause lung over expansion (NEVER HOLD YOUR BREATH)
what's the most crucial rule of scuba diving - ANSbreathe constantly and in no way, never
maintain your breath
while regulator is from your mouth, what must you do - ANSblow bubbles
what is a opposite block - ANSpain and soreness as a result of increasing air trapped inner an
air area all through ascent (ears, sinuses)
what should you do in case you sense discomfort for the duration of ascent due to air growth
inside the ears, sinuses, stomach, intestines or tooth - ANSstop your ascent, descend a
meter/few ft and give the trapped air time to work its manner out
Positive Buoyancy - ANSThe tendency of an object to glide or upward thrust in a fluid due to the
fact the item weighs much less than the fluid it displaces
Neutral Buoyancy - ANSA condition in which an object's mass equals the mass it displaces in a
surrounding medium. The object neither sinks nor floats.
Negative Buoyancy - ANSThe tendency of an object to sink in a fluid because the item weighs
extra than the fluid it displaces
What gadget do you use to govern your buoyancy - ANSBCD (buoyancy manage tool) & lead
weights
and additionally your lungs through respiration out (sink) and in (drift)
Salt water weighs greater than clean making you.. - ANSmore buoyant
Why do you normally best sense modifications of stress to your body air areas - ANSYour body
is generally liquid, that's incompressible and distributes pressure equally for the duration of the
body.
Why are stress changes even as ascending or descending underwater a lot more massive than
stress modifications while doing the same in air - ANSWater is tons denser and heavier than air,
stress changes much greater considerably for a given distance ascent or descent.
Air stress at sea degree is - ANSStandard Atmospheric Pressure 1 ata or 1 bar
How many ata/bar do you add for every ten meters you descend underneath water - ANS1
ata/bar for each 10m/33ft you descend
10m/33ft 2 bar/ata
20m/66ft three bar/ata
30m/99ft four bar/ata
What is the relationship between air volume and density - ANSas strain increases extent
decreases:
at 10m/33ft you have got 1/2 extent (2bar)
at 20m/66ft you have got 1/3 volume (3bar)
at 30m/99ft you've got 1/four extent (4bar)
what do you do to preserve air volume as you descend? - ANSyou need to add air to the space
to keep up with the volume discount (equalization)
, in case you added air to a area to maintain its extent whilst below strain what takes place to that
air as the stress decreases - as you ascend - ANSthe air expands
what two air areas should subject you as a diver - ANSears & sinuses
what's squeeze - ANSa pressure imbalance wherein stress outdoor an air space exceeds
pressure inside an air area ensuing in ache or pain (ears, sinuses, lungs, enamel can squeeze)
how will you keep away from discomfort from squeeze - ANSadd air to the space for the
duration of descent (equalization)
lungs automatically equalize as you... - ANSbreathe!
3 approaches to equalize throughout descent - ANS1. Pinch nose and lightly blow
2. Swallow and wiggle jaw facet to facet
three. Swallow, wiggle jaw and blow with nostril pinched
how often ought to you equalize all through descent - ANSevery meter/few ft earlier than you
sense any soreness
what can appear in case you try a forceful equalization or prolonged equalization - ANSruptured
ear drum
what have to you do if you feel pain - ANSascend until the discomfort eases, equalize and
continue a slow descent equalizing more regularly
what in case you can't equalize - ANSdo no longer dive
how do you equalize your mask - ANSblow out via your nose
what can happen if you maintain your breath whilst ascending - ANSthe air to your lungs will
enlarge in quantity and possibly cause lung over expansion (NEVER HOLD YOUR BREATH)
what's the most crucial rule of scuba diving - ANSbreathe constantly and in no way, never
maintain your breath
while regulator is from your mouth, what must you do - ANSblow bubbles
what is a opposite block - ANSpain and soreness as a result of increasing air trapped inner an
air area all through ascent (ears, sinuses)
what should you do in case you sense discomfort for the duration of ascent due to air growth
inside the ears, sinuses, stomach, intestines or tooth - ANSstop your ascent, descend a
meter/few ft and give the trapped air time to work its manner out
