SDI Scuba Certification Exam Study Guide
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Questions With Correct Answers
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Define //SCUBA //- //verified //answer(s)-✔✔S //- //self
C //- //contained
U //- //underwater
B //- //breathing
A //- //apparatus
List //3 //important //scuba //diving //changes //that //occurred //in //1950s //- //verified //answer(s)-✔✔1)
//published //USN //dive //tables
2) //invented //the //personal //dive //computer //
3) //equipment //manufacturers //made //improvements //to //the //design //and //workmanship //of
//gear
Name //3 //different //devices //that //modern //dive //computers //replace //- //verified //answer(s)-
✔✔1) //dive //tables
2) //J-valves //
3) //depth //gauges
What //sets //SDI //apart //from //other //training //agencies? //- //verified //answer(s)-✔✔First //dive
//training //agency //to //provide //entry //level //scuba //instruction //that //incorporates //the //use //of
//personal //dive //computers //--> //more //streamlined //scuba //course //w/ //more //instruction //time
//in //the //water
, How //much //larger //and //closer //do //objects //appear //underwater //and //why? //- //verified
answer(s)-✔✔Objects //underwater //appear //25% //larger //and //25% //closer //
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As //light //travels //through //the //airspace //created //by //the //mask, //it //bends, //creating //a
//magnifying //effect.
How //much //faster //does //sound //move //through //water //than //air //and //why? //- //verified
answer(s)-✔✔4 //times //faster //because //water //is //about //800 //times //denser //than //air.
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What //is //the //first //color //to //be //absorbed //underwater? //- //verified //answer(s)-✔✔Red //(within
//first //25 //feet)
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. //- //verified
answer(s)-✔✔Slack //tide
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If //you //are //caught //in //a //rip //current, //first //swim //_____ //to //the //current //to //get //out //of //it
before //swimming //towards //shore. //- //verified //answer(s)-✔✔Parallel
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Waves //are //usually //caused //by //- //verified //answer(s)-✔✔Wind //pushing //water //on //the
//surface
T //or //F: //Anticipate //surge //action //to //avoid //contact //with //stationary //objects //- //verified
answer(s)-✔✔True
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What //type //of //marine //life //cause //most //diving //injuries? //- //verified //answer(s)-✔✔Most
//diving //injuries //result //from //animal's //defensive //response //to //a //perceived //threat
// // // // //
Questions With Correct Answers
// // // //
Define //SCUBA //- //verified //answer(s)-✔✔S //- //self
C //- //contained
U //- //underwater
B //- //breathing
A //- //apparatus
List //3 //important //scuba //diving //changes //that //occurred //in //1950s //- //verified //answer(s)-✔✔1)
//published //USN //dive //tables
2) //invented //the //personal //dive //computer //
3) //equipment //manufacturers //made //improvements //to //the //design //and //workmanship //of
//gear
Name //3 //different //devices //that //modern //dive //computers //replace //- //verified //answer(s)-
✔✔1) //dive //tables
2) //J-valves //
3) //depth //gauges
What //sets //SDI //apart //from //other //training //agencies? //- //verified //answer(s)-✔✔First //dive
//training //agency //to //provide //entry //level //scuba //instruction //that //incorporates //the //use //of
//personal //dive //computers //--> //more //streamlined //scuba //course //w/ //more //instruction //time
//in //the //water
, How //much //larger //and //closer //do //objects //appear //underwater //and //why? //- //verified
answer(s)-✔✔Objects //underwater //appear //25% //larger //and //25% //closer //
//
As //light //travels //through //the //airspace //created //by //the //mask, //it //bends, //creating //a
//magnifying //effect.
How //much //faster //does //sound //move //through //water //than //air //and //why? //- //verified
answer(s)-✔✔4 //times //faster //because //water //is //about //800 //times //denser //than //air.
//
What //is //the //first //color //to //be //absorbed //underwater? //- //verified //answer(s)-✔✔Red //(within
//first //25 //feet)
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. //- //verified
answer(s)-✔✔Slack //tide
//
If //you //are //caught //in //a //rip //current, //first //swim //_____ //to //the //current //to //get //out //of //it
before //swimming //towards //shore. //- //verified //answer(s)-✔✔Parallel
//
Waves //are //usually //caused //by //- //verified //answer(s)-✔✔Wind //pushing //water //on //the
//surface
T //or //F: //Anticipate //surge //action //to //avoid //contact //with //stationary //objects //- //verified
answer(s)-✔✔True
//
What //type //of //marine //life //cause //most //diving //injuries? //- //verified //answer(s)-✔✔Most
//diving //injuries //result //from //animal's //defensive //response //to //a //perceived //threat
