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SDI International Scuba Diving Chapters 1-5 Comprehensive, Exams of Advanced Education

SDI International Scuba Diving Chapters 1-5 Comprehensive

Typology: Exams

2023/2024

Available from 09/09/2024

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SDI International Scuba Diving Chapters
1-5 Comprehensive Review
A cylinder should be visually inspected at least ________ a year and hydrostatically
tested every __________ years, in the United States. - ANSWER-Once, Five
A properly weighted scuba diver should float at _____________ when her BCD is
deflated and lungs are fully inflated. - ANSWER-Eye Level
Define maximum dive depth? - ANSWER-How far down you are
Define no-stop time - ANSWER-The amount of time remaining at any point during a
dive before incurring a mandatory decompression stop.
Define risk management - ANSWER-RM is a decision-making process used to
systematically evaluate possible courses of action, identify risks, benefits, and
determine the best course of action for any given situation.
Describe all the steps to assemble a BCD and regulator to a scuba cylinder? -
ANSWER-Spin the tank around so that the back of the valve is facing you. Place the
BCD band(s) over the top of the cylinder so that the back of the BCD is facing you.
Raise or lower the BCD so the top is even with the cylinder valve. Fasten the buckles.
Remove dust cap, hold first stage in left hand, rotate the chambers until the primary
second stage sits on the right. Screw the knob on your first stage until it is finger tight.
Connect the low pressure inflator hose to the stem on the BCD's inflator. Turn on the
air.
Describe from the start to finish the steps to disassemble your scuba system. -
ANSWER-1. Remove accessories and weights
2. Decompress the system: Turn the valve knob completely clockwise. Decompress one
of the second gauges (purge button or the auto inflator button to vent air remaining in
the hoses)
3. Detach the LP hose from the inflator assembly by pulling the collar back on the quick
disconnect. Unscrew the yoke knob until the first stage can slip off the top of the valve.
4. Undo the straps and remove the BCD from the cylinder.
5. Rinse off gear and fill and dump BCD
Describe how to perform a giant stride entry off a boat. - ANSWER-Stand on the edge
of the dive platform, check the water below to make sure it is clear of other divers, put
your right hand over your mask and regulator and your left hand over your weight belt
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SDI International Scuba Diving Chapters

1-5 Comprehensive Review

A cylinder should be visually inspected at least ________ a year and hydrostatically tested every __________ years, in the United States. - ANSWER-Once, Five A properly weighted scuba diver should float at _____________ when her BCD is deflated and lungs are fully inflated. - ANSWER-Eye Level Define maximum dive depth? - ANSWER-How far down you are Define no-stop time - ANSWER-The amount of time remaining at any point during a dive before incurring a mandatory decompression stop. Define risk management - ANSWER-RM is a decision-making process used to systematically evaluate possible courses of action, identify risks, benefits, and determine the best course of action for any given situation. Describe all the steps to assemble a BCD and regulator to a scuba cylinder? - ANSWER-Spin the tank around so that the back of the valve is facing you. Place the BCD band(s) over the top of the cylinder so that the back of the BCD is facing you. Raise or lower the BCD so the top is even with the cylinder valve. Fasten the buckles. Remove dust cap, hold first stage in left hand, rotate the chambers until the primary second stage sits on the right. Screw the knob on your first stage until it is finger tight. Connect the low pressure inflator hose to the stem on the BCD's inflator. Turn on the air. Describe from the start to finish the steps to disassemble your scuba system. - ANSWER-1. Remove accessories and weights

  1. Decompress the system: Turn the valve knob completely clockwise. Decompress one of the second gauges (purge button or the auto inflator button to vent air remaining in the hoses)
  2. Detach the LP hose from the inflator assembly by pulling the collar back on the quick disconnect. Unscrew the yoke knob until the first stage can slip off the top of the valve.
  3. Undo the straps and remove the BCD from the cylinder.
  4. Rinse off gear and fill and dump BCD Describe how to perform a giant stride entry off a boat. - ANSWER-Stand on the edge of the dive platform, check the water below to make sure it is clear of other divers, put your right hand over your mask and regulator and your left hand over your weight belt

buckle, stand straight, look directly ahead and take a big step out off the edge of the platform. Signal OK if everything is alright. Describe the function of a scuba regulator first stage and second stage - ANSWER-The first stage regulator lowers the PSI from a high pressure to an intermediate pressure. The second stage regulator further lowers the pressure to an ambient pressure. Describe the procedure recommended for a safety stop. - ANSWER-A safety stop should be conducted between 3 and 6 meters (10-20 feet) for 3-5 minutes before coming up to surface. A safety stop is recommended on any dive up to 30 meters ( feet) and mandatory for dives over 30 meters (100 feet). Describe the symptoms of DCS, including mild to severe signs and symptoms? - ANSWER-1. Joint pain

  1. Disyness
  2. Loss of sensation
  3. Difficulty breathing
  4. Rash Describe the two emergency out-of-air ascents. - ANSWER-1. Signal out of air
  5. Remove regulator, exhale, reach for your buddy's alternate air source.
  6. Put in your mouth, purge and breath exchanging "OK" and "Go up" hand signals.
  7. Donor should hold onto the receiver's BCD shoulder strap as you slowly ascend together.
  8. Orally inflate your BCD when you reach the surface. Describe two different ways to indicate "OK". - ANSWER-1. The OK sign with your hands
  9. Fist on your head Describe two important features of a weight system. - ANSWER-1. To weigh you down
  10. You can use different weights Describe two ways to clear a flooded second stage. - ANSWER-1. Depress the purge button before inhaling.
  11. Exhale into the mouthpiece. Describe what to do if you and your buddy become separated during a dive. - ANSWER-Look around the immediate area for 1 minute. Rap on your cylinder and listen for a reply.If you are reunited under water check air supplies and remaining no-stop time to decide how to continue with the dive.If you do not find your buddy after one minute, begin a normal ascent to the surface.Wait on the surface until your buddy ascends. Describe what to do if you exceed the no-deco time registered on your computer. - ANSWER-The computer will display each decompression stop depth and time. Ascend at a normal rate and stop at the first decompression depth. Stay at that depth for the
  1. Pressure
  2. Time List the three important scuba diving changes that occurred in the 1950s? - ANSWER-1. No full body suits
  3. Published dive tables
  4. Equipment changes List three components of a compass. - ANSWER-1. Card
  5. Lubber line
  6. Face List three different reasons that it is advisable to check with your local dive center before conducting diving in an area you are unfamiliar with? - ANSWER-1. Currents
  7. Wildlife
  8. Particular Dangers List two possible ways a diver may feel if they become "Narked" at depth? - ANSWER-
  9. Extreme Anxiety
  10. Extreme Euphoria Name at least one visual and one audible rescue signaling device? - ANSWER-1. Whistle
  11. Red or yellow bright neon inflatable device Name four different water entries. - ANSWER-1. Giant stride
  12. Controlled sated
  13. Back roll entry
  14. Shore entry Name three different devices that modern dive computers replace? - ANSWER-1. Removal of the J valve
  15. Gauges were combined
  16. Depth, time, Pressure Name two basic fin designs and describe the main features of each? - ANSWER-Full foot encloses whole foot Open heel Name two functions of wet suit boots? - ANSWER-1. Protection
  17. Warmth
  18. Makes fins fit better State the gauges that a console might hold. - ANSWER-How much air is left in the tank, depth, compass.

The thumbs up signal means "OK." True or False - ANSWER-False it means ascend True or False: Anticipate surge action to avoid contact with stationary objects? - ANSWER-True Waves are usually caused by? - ANSWER-Moon, and wind What are the two main modes of operation of a dive computer? - ANSWER-1. Surface mode

  1. Decompression mode What are the two types of dive flags that are commonly flown from a dive boat? - ANSWER-1. Diver down
  2. International Alpha flag What are two types of weight systems? - ANSWER-1. Belts
  3. Weight integrated BCD What are two ways a PDC may alert a diver that he or she is ascending too fast? - ANSWER-1. Audible alarms
  4. Visual decompression violation warnings What does "SCUBA" stand for in scuba diving? - ANSWER-self-contained underwater breathing apparatus What does the abbreviation BCD stand for? - ANSWER-Buoyancy Compensation Device What elements should you and your buddy agree on before the dive? - ANSWER-A dive plan that contains ebjectives compromised by both divers. Familiarizing yourselves with the dive site and conditionsDetermining entry and exit pointsDeciding the direction in which you will travelReviewing hand signals Agreeing upon dive time, maximum depth and minimum cylinder pressureLost buddy and emergency procedures Who the leader is What extra attire can enhance a diver's warmth when worn with a wet or dry suit? - ANSWER-Hood or Gloves What is a reverse block? - ANSWER-Air cannot expand or escape upon ascending What is the absolute pressure (in atmospheres/ bars) at 20 meters (66 feet)? - ANSWER-14.7 PSI (pressure increases) What is the depth threshold where most scuba divers generally begin to be affected by nitrogen narcosis? - ANSWER-100ft

What should you do any time the second stage is out of your mouth? - ANSWER-Blow Bubbles or put the back up in your mouth then do either a sweep or reach technique to get it back What should you do if you become entangled underwater? - ANSWER-Do not struggle. Move back the way you came to try to untangle yourself. If you have a knife cut yourself out. If you do not have a knife wait for someone who does to come cut you out. What should you do if you experience a reverse block upon ascending? - ANSWER-Go back down and re ascend and it should clear itself What should you do if you experience discomfort in your ears upon descending? - ANSWER-STOP and re equalize until the discomfort goes away What should you do if you see a potentially dangerous animal underwater and it does not leave the area? - ANSWER-Stay calm and move in a direction away from it (they are more afraid of you than you are of them) What should you do if you suddenly feel sick and develop a headache during a dive? - ANSWER-Stop the dive and resurface What types of marine life cause most diving injuries? - ANSWER-Diver caused injuries What will be the volume in a ball that is filled with two cubic feet of air at 99 feet when it's taken to the surface? - ANSWER-8 cubic feet @ the surface When diving from shore, the best time to dive is when there is the least amount of tidal current. _____ tide is when there is no horizontal water movement? - ANSWER-Slack When planning a repetitive dive, the _________ diver should be made first. - ANSWER- Deepest Which gas causes extreme headaches and nausea, and in high enough concentrations causes unconsciousness and the lips and fingernail beds to turn bright red? - ANSWER-Carbon Monoxide Which gas component in air causes decompression sickness and narcosis? - ANSWER-Nitrogen Why should you avoid consuming drugs or alcohol prior to a dive? - ANSWER-The use of alcohol and drugs greatly increases the risk of decompression sickness in divers.