PADI Open Water Exam
ears, sinuses, mask - correct answerthree major body air spaces that increasing pressure affects
squeeze - correct answercaused by greater pressure outside the air space than inside it, and causes
discomfort or injury by pressure balance that pushes tissues into an air space
ear squeeze - correct answerpressure pushing your eardrum and surrounding tissues inward
sinus squeeze - correct answerdiscomfort in cheeks, central forehead, and along nose
mask squeeze - correct answerpulling or sucking sensation on face
equalization - correct answerkeeping the pressure equal with outside pressure, so people stay at their
normal volume
ears and sinuses - correct answerto equalize ______ ______ __________: pinch your nose and blow
gently against it
mask - correct answerto equalize a _______: blow air through your nose as you descend
as often as you can - correct answerwhen should you equalize?
stop; signal - correct answerif you can't equalize, _______ your descent immediately, and __________
your buddies or instructor
gently - correct answerhow should you equalize?
, breathe continuously and never hold your breath - correct answerthe most important rule of scuba
diving
lung over-expansion - correct answerwhat can occur from not following the most important rule of
scuba diving?
reverse block (squeeze) - correct answerresults when expanding air becomes trapped in a body air space
slow/stop ascent; descend a meter (to reduce discomfort and give the trapped air time to work its way
out) - correct answerwhat should i do if i feel discomfort in my ears, sinuses, or mask?
1/2 - correct answerhow long does my air supply last at 10 meters/33 feet than at surface?
1/3 - correct answerhow long does my air supply last at 20 meters/66 feet than at surface?
deep, slow breaths - correct answerwhat type of breaths should you take when trying to efficiently
breathe dense air underwater?
water displacement - correct answerwhat causes buoyancy?
positive buoyancy - correct answeran object weighs less than the water it displaces; it floats
negative buoyancy - correct answeran object weight more than the water it displaces; it sinks
neutral buoyancy - correct answeran object weighs the same as the water it displaces; it neither floats
nor sinks
salt water weighs more (due to minerals) - correct answerwhy does salt water cause more buoyancy
than fresh water?
ears, sinuses, mask - correct answerthree major body air spaces that increasing pressure affects
squeeze - correct answercaused by greater pressure outside the air space than inside it, and causes
discomfort or injury by pressure balance that pushes tissues into an air space
ear squeeze - correct answerpressure pushing your eardrum and surrounding tissues inward
sinus squeeze - correct answerdiscomfort in cheeks, central forehead, and along nose
mask squeeze - correct answerpulling or sucking sensation on face
equalization - correct answerkeeping the pressure equal with outside pressure, so people stay at their
normal volume
ears and sinuses - correct answerto equalize ______ ______ __________: pinch your nose and blow
gently against it
mask - correct answerto equalize a _______: blow air through your nose as you descend
as often as you can - correct answerwhen should you equalize?
stop; signal - correct answerif you can't equalize, _______ your descent immediately, and __________
your buddies or instructor
gently - correct answerhow should you equalize?
, breathe continuously and never hold your breath - correct answerthe most important rule of scuba
diving
lung over-expansion - correct answerwhat can occur from not following the most important rule of
scuba diving?
reverse block (squeeze) - correct answerresults when expanding air becomes trapped in a body air space
slow/stop ascent; descend a meter (to reduce discomfort and give the trapped air time to work its way
out) - correct answerwhat should i do if i feel discomfort in my ears, sinuses, or mask?
1/2 - correct answerhow long does my air supply last at 10 meters/33 feet than at surface?
1/3 - correct answerhow long does my air supply last at 20 meters/66 feet than at surface?
deep, slow breaths - correct answerwhat type of breaths should you take when trying to efficiently
breathe dense air underwater?
water displacement - correct answerwhat causes buoyancy?
positive buoyancy - correct answeran object weighs less than the water it displaces; it floats
negative buoyancy - correct answeran object weight more than the water it displaces; it sinks
neutral buoyancy - correct answeran object weighs the same as the water it displaces; it neither floats
nor sinks
salt water weighs more (due to minerals) - correct answerwhy does salt water cause more buoyancy
than fresh water?
