SSI OPEN WATER DIVER UPDATED QUESTIONS AND
ANSWERS MARKED A+
✔✔whats the second rule of scuba? - ✔✔ascend slowly and maintain control
✔✔what is the third rule of scuba? - ✔✔never dive alone or beyond your level of training
✔✔an object immersed in water will be buoyed upward by a force _______ the weight
of the water it displaces - ✔✔equal to
✔✔assuming a consistent air consumption rate, diving at a pressure of 4 bar will use
_____ as much air as diving at 2 bar - ✔✔2x
✔✔the purpose of a BC is to: - ✔✔control ascent and descent rates; maintain neutral
buoyancy during the dive; provide surface floatation
✔✔during normal activities, divers should never exceed an ascent rate of _______
meters per minute - ✔✔9
✔✔a high pressure scuba cylinder should be stored: - ✔✔secured and with a minimum
of 500 to 750 psi
✔✔What is the threshold of overpressure that the lungs can withstand? - ✔✔2 psi
✔✔Arterial Gas embolism (AGE) - ✔✔-most serious
-gas bubbles are released into the circulatory system via ruptured alveoli in the lungs,
blocking circulation on ascent
signs: unconsciousness, coma, respiratory distress, loss of small motor and gross
control, headache, vertigo, visual auditory and speech abnormalities
✔✔pneumothorax - ✔✔-second most serious
-air escapes lungs (over-expansion) and gets between pleura and rib cage
-can cause collapsed lung
signs: breathing difficulties, chest pain, weakness, cyanosis
✔✔subcutaneous emphysema - ✔✔-air escapes from lungs into mediastinum and
moved along trachea into region around the collar bone
signs: swelling in neck with crepitation, voice change, trouble breathing
✔✔mediastinal emphysema - ✔✔air escapes lungs into mediastinum and presses on
heart and blood vessels
, signs: chest pain, breathing difficulties, weakness, collapse, cyanosis
✔✔what is often the only sign of an injury? - ✔✔unconsciousness
✔✔What are the five ways to prevent over-expansion injuries? - ✔✔1. breath
continuously
2. don't dive with congestion
3. don't smoke
4. use the right equipment in good condition
5. take your time
✔✔what are the four main steps of first aid for overexpansion? - ✔✔1. treat for shock
2. administer oxygen
3. stand by to administer cpr
4. obtain proper medical aid as quickly as possible
✔✔caissons disease - ✔✔the bend/ decompression sickness
-the sudden release of nitrogen from solution when ascent is too quick
✔✔perfusion - ✔✔the process of our body delivering blood capillary beds in the tissue
✔✔what are the signs of decompression sickness? - ✔✔deep persistent pain (joints),
itchy skin rash, visual disturbances, motor paralysis, weakness, loss manual dexterity,
vertigo, numbness, respiratory distress, headache, loss memory, unconsciousness
✔✔how long should you wait to fly after diving? - ✔✔24 hours
✔✔nitrogen narcosis - ✔✔-rapture of the deep
- intensity increases with depth
signs:
light headedness, inc in confidence, unusual behavior, dizziness, abnormal vision and
hearing, inability to reason, carelessness, short term memory loss
✔✔what are the factors that affect a diver's resistance to nitrogen narcosis? -
✔✔consumption of alcohol/ drugs, fatigue, carbon dioxide build up, anxiety,
inexperience
✔✔what is the limit for pure oxygen? - ✔✔1.6 bar
✔✔Which of the following overexpansion injuries can be characterized by chest pain,
breathing difficulties, weakness, and cyanosis (blueness) of the lips and nail beds: -
✔✔mediastinal emphysema and pneumothorax
ANSWERS MARKED A+
✔✔whats the second rule of scuba? - ✔✔ascend slowly and maintain control
✔✔what is the third rule of scuba? - ✔✔never dive alone or beyond your level of training
✔✔an object immersed in water will be buoyed upward by a force _______ the weight
of the water it displaces - ✔✔equal to
✔✔assuming a consistent air consumption rate, diving at a pressure of 4 bar will use
_____ as much air as diving at 2 bar - ✔✔2x
✔✔the purpose of a BC is to: - ✔✔control ascent and descent rates; maintain neutral
buoyancy during the dive; provide surface floatation
✔✔during normal activities, divers should never exceed an ascent rate of _______
meters per minute - ✔✔9
✔✔a high pressure scuba cylinder should be stored: - ✔✔secured and with a minimum
of 500 to 750 psi
✔✔What is the threshold of overpressure that the lungs can withstand? - ✔✔2 psi
✔✔Arterial Gas embolism (AGE) - ✔✔-most serious
-gas bubbles are released into the circulatory system via ruptured alveoli in the lungs,
blocking circulation on ascent
signs: unconsciousness, coma, respiratory distress, loss of small motor and gross
control, headache, vertigo, visual auditory and speech abnormalities
✔✔pneumothorax - ✔✔-second most serious
-air escapes lungs (over-expansion) and gets between pleura and rib cage
-can cause collapsed lung
signs: breathing difficulties, chest pain, weakness, cyanosis
✔✔subcutaneous emphysema - ✔✔-air escapes from lungs into mediastinum and
moved along trachea into region around the collar bone
signs: swelling in neck with crepitation, voice change, trouble breathing
✔✔mediastinal emphysema - ✔✔air escapes lungs into mediastinum and presses on
heart and blood vessels
, signs: chest pain, breathing difficulties, weakness, collapse, cyanosis
✔✔what is often the only sign of an injury? - ✔✔unconsciousness
✔✔What are the five ways to prevent over-expansion injuries? - ✔✔1. breath
continuously
2. don't dive with congestion
3. don't smoke
4. use the right equipment in good condition
5. take your time
✔✔what are the four main steps of first aid for overexpansion? - ✔✔1. treat for shock
2. administer oxygen
3. stand by to administer cpr
4. obtain proper medical aid as quickly as possible
✔✔caissons disease - ✔✔the bend/ decompression sickness
-the sudden release of nitrogen from solution when ascent is too quick
✔✔perfusion - ✔✔the process of our body delivering blood capillary beds in the tissue
✔✔what are the signs of decompression sickness? - ✔✔deep persistent pain (joints),
itchy skin rash, visual disturbances, motor paralysis, weakness, loss manual dexterity,
vertigo, numbness, respiratory distress, headache, loss memory, unconsciousness
✔✔how long should you wait to fly after diving? - ✔✔24 hours
✔✔nitrogen narcosis - ✔✔-rapture of the deep
- intensity increases with depth
signs:
light headedness, inc in confidence, unusual behavior, dizziness, abnormal vision and
hearing, inability to reason, carelessness, short term memory loss
✔✔what are the factors that affect a diver's resistance to nitrogen narcosis? -
✔✔consumption of alcohol/ drugs, fatigue, carbon dioxide build up, anxiety,
inexperience
✔✔what is the limit for pure oxygen? - ✔✔1.6 bar
✔✔Which of the following overexpansion injuries can be characterized by chest pain,
breathing difficulties, weakness, and cyanosis (blueness) of the lips and nail beds: -
✔✔mediastinal emphysema and pneumothorax
