Scuba Diving Final Exam Questions And
Correct Answers
What cwill cthe cbuoyancy cof can cobject cbe c(positive, cneutral, cor cnegative) cif cit
cdisplaces can camount cof cwater: c
a. cmore cthan cits cown cweight?
b. cless cthan cits cown cweight? c
c. cequal cto cits cown cweight? c- cCORRECT cANS✔✔a. cpositive
b. cnegative
c. cneutral
How cdoes cthe cbuoyancy cof can cobject cdiffer cin cfresh cwater ccompared cto csalt cwater.
c- cCORRECT cANS✔✔Because csalt cwater cweighs cmore cthan cfresh cwater, cit ccauses
cmore cbuoyancy c(more cupward cforce)
What cis cthe crelationship cbetween cincreasing cand cdecreasing cdepth cand cwater
cpressure? c- cCORRECT cANS✔✔With cincreasing cdepth cthe cwater cpressure
cincreases. cWith cdecreasing cdepth cthe cwater cpressure cdecreases.
What care cthe cabsolute cpressures, cair cvolume, cand cair cdensity cin catmospheres, cfor:
c
a. c10m/33ft
b. c20m/66ft
b. c30m/99ft
c. c40m/132ft c- cCORRECT cANS✔✔a. c2 cbar/ata, c1/2, cx c2
b. c3 cbar/ata, c1/3, cx c3
c. c4 cbar/ata, c1/4, cx4
d. c5 cbar/ata, c1/5, cx5
What cis cthe crelationship cbetween cair cvolume cand cdensity, cand chow cdo cthey cvary
caccording cto cthis crelationship cwhen cpressure cincreases cor cdecreases? c-
cCORRECT cANS✔✔Air cvolume cand cdensity cchange cproportionately cwith cpressure.
cAs cpressure cincreases, cair cvolume cdecreases, cand cair cdensity cincreases. cAs
cpressure cdecreases, cair cvolume cincreases, cand cair cdensity cdecreases.
What cis ca c"squeeze"? c- cCORRECT cANS✔✔A cpressure cimbalance cthat cpushes
ctissues cinto can cair cspace.
What cis c"equalization"? c- cCORRECT cANS✔✔The cprocess cof cadding cair cto can cair
cspace.
, What care cthe cthree cways cyou ccan cequalize cair cspaces cduring cdescent? c-
cCORRECT cANS✔✔1. cpinch cyour cnose cand cblow cgently cagainst cit
2. cwiggling cyour cjaw cside-to-side cand cswallowing
3. cblow cair cinto cmask cthrough cyour cnose
How coften cshould cyou cequalize cduring cdescent? c- cCORRECT cANS✔✔Frequently
What cthree csteps cshould cyou ctake cif cyou cfeel cdiscomfort cin can cair cspace cwhile
cdescending? c- cCORRECT cANS✔✔1. cstop cyour cdescent
2. csignal cyour cbuddy(ies)
3. cascend cslightly cuntil cthe cdiscomfort cpasses cand ctry cagain
What cis cthe cmost cimportant crule cin cscuba cdiving? c- cCORRECT cANS✔✔to cbreathe
ccontinuously cand cnever, cever chold cyour cbreath
What care cthe cconsequences cof cbreaking cthe cmost cimportant crule cin cscuba cdiving?
c- cCORRECT cANS✔✔lung coverexpansion cinjuries
How cdoes cincreasing cdepth caffect chow clong cyour cair csupply clasts? c- cCORRECT
cANS✔✔it cshortens cit
What's cthe cmost cefficient cway cto cbreathe cdense cair cunderwater? c- cCORRECT
cANS✔✔take cslow, cdeep cbreaths
When cselecting cscuba cequipment, cwhat care cthe cthree cmost cimportant cfactors? c-
cCORRECT cANS✔✔suitability, cfit, cand ccomfort
How cdo cyou cprepare ca cnew cmask cfor cuse? c- cCORRECT cANS✔✔you cmay cneed
cto cscrub cthe cinterior cof cthe cglass cwith ca cmask ccleaner. cmain cpreparation cis cto
cadjust cthe cstrap. cfit cit cover cthe ccrown cof cyour chead, cabove cyour cears, cwith ca
csnug cbut cnot coverly ctightly cfit. csecure cthe cstrap clocking cdevice cif cit chas cone.
What care ctwo cbasic ctypes cof ctank cvalves? c- cCORRECT cANS✔✔yoke cand cDIN
What's cthe cdifference cbetween ca cDIN cvalve cand ca cyoke cvalve? c- cCORRECT
cANS✔✔the cyoke csystem cholds cthe cfirst cstage cto cthe ccylinder cwith ca cclamp
csystem. cwith cthe cDIN csystem, cthe cregulator cthreads cinto cthe cvalve.
What's cthe cbest cway cto ckeep cwater cout cof ca cscuba ctank? c- cCORRECT cANS✔✔to
cnever ccompletely cempty cit cand cstore cthe ccylinder cin ca cstanding cposition.
Why cdo cyou cneed cscuba ctank cvisual cinspections cand cpressure ctests cand chow
coften care cthey cdone? c- cCORRECT cANS✔✔to ckeep cthe cmaintenance cof cthe
ccylinder cand cto cknow cit cis cproperly cworking. cthe cvisual cinspection cis cdone
cannually. cthe cpressure ctest cis cdone cevery ctwo cto cfive cyears.
Correct Answers
What cwill cthe cbuoyancy cof can cobject cbe c(positive, cneutral, cor cnegative) cif cit
cdisplaces can camount cof cwater: c
a. cmore cthan cits cown cweight?
b. cless cthan cits cown cweight? c
c. cequal cto cits cown cweight? c- cCORRECT cANS✔✔a. cpositive
b. cnegative
c. cneutral
How cdoes cthe cbuoyancy cof can cobject cdiffer cin cfresh cwater ccompared cto csalt cwater.
c- cCORRECT cANS✔✔Because csalt cwater cweighs cmore cthan cfresh cwater, cit ccauses
cmore cbuoyancy c(more cupward cforce)
What cis cthe crelationship cbetween cincreasing cand cdecreasing cdepth cand cwater
cpressure? c- cCORRECT cANS✔✔With cincreasing cdepth cthe cwater cpressure
cincreases. cWith cdecreasing cdepth cthe cwater cpressure cdecreases.
What care cthe cabsolute cpressures, cair cvolume, cand cair cdensity cin catmospheres, cfor:
c
a. c10m/33ft
b. c20m/66ft
b. c30m/99ft
c. c40m/132ft c- cCORRECT cANS✔✔a. c2 cbar/ata, c1/2, cx c2
b. c3 cbar/ata, c1/3, cx c3
c. c4 cbar/ata, c1/4, cx4
d. c5 cbar/ata, c1/5, cx5
What cis cthe crelationship cbetween cair cvolume cand cdensity, cand chow cdo cthey cvary
caccording cto cthis crelationship cwhen cpressure cincreases cor cdecreases? c-
cCORRECT cANS✔✔Air cvolume cand cdensity cchange cproportionately cwith cpressure.
cAs cpressure cincreases, cair cvolume cdecreases, cand cair cdensity cincreases. cAs
cpressure cdecreases, cair cvolume cincreases, cand cair cdensity cdecreases.
What cis ca c"squeeze"? c- cCORRECT cANS✔✔A cpressure cimbalance cthat cpushes
ctissues cinto can cair cspace.
What cis c"equalization"? c- cCORRECT cANS✔✔The cprocess cof cadding cair cto can cair
cspace.
, What care cthe cthree cways cyou ccan cequalize cair cspaces cduring cdescent? c-
cCORRECT cANS✔✔1. cpinch cyour cnose cand cblow cgently cagainst cit
2. cwiggling cyour cjaw cside-to-side cand cswallowing
3. cblow cair cinto cmask cthrough cyour cnose
How coften cshould cyou cequalize cduring cdescent? c- cCORRECT cANS✔✔Frequently
What cthree csteps cshould cyou ctake cif cyou cfeel cdiscomfort cin can cair cspace cwhile
cdescending? c- cCORRECT cANS✔✔1. cstop cyour cdescent
2. csignal cyour cbuddy(ies)
3. cascend cslightly cuntil cthe cdiscomfort cpasses cand ctry cagain
What cis cthe cmost cimportant crule cin cscuba cdiving? c- cCORRECT cANS✔✔to cbreathe
ccontinuously cand cnever, cever chold cyour cbreath
What care cthe cconsequences cof cbreaking cthe cmost cimportant crule cin cscuba cdiving?
c- cCORRECT cANS✔✔lung coverexpansion cinjuries
How cdoes cincreasing cdepth caffect chow clong cyour cair csupply clasts? c- cCORRECT
cANS✔✔it cshortens cit
What's cthe cmost cefficient cway cto cbreathe cdense cair cunderwater? c- cCORRECT
cANS✔✔take cslow, cdeep cbreaths
When cselecting cscuba cequipment, cwhat care cthe cthree cmost cimportant cfactors? c-
cCORRECT cANS✔✔suitability, cfit, cand ccomfort
How cdo cyou cprepare ca cnew cmask cfor cuse? c- cCORRECT cANS✔✔you cmay cneed
cto cscrub cthe cinterior cof cthe cglass cwith ca cmask ccleaner. cmain cpreparation cis cto
cadjust cthe cstrap. cfit cit cover cthe ccrown cof cyour chead, cabove cyour cears, cwith ca
csnug cbut cnot coverly ctightly cfit. csecure cthe cstrap clocking cdevice cif cit chas cone.
What care ctwo cbasic ctypes cof ctank cvalves? c- cCORRECT cANS✔✔yoke cand cDIN
What's cthe cdifference cbetween ca cDIN cvalve cand ca cyoke cvalve? c- cCORRECT
cANS✔✔the cyoke csystem cholds cthe cfirst cstage cto cthe ccylinder cwith ca cclamp
csystem. cwith cthe cDIN csystem, cthe cregulator cthreads cinto cthe cvalve.
What's cthe cbest cway cto ckeep cwater cout cof ca cscuba ctank? c- cCORRECT cANS✔✔to
cnever ccompletely cempty cit cand cstore cthe ccylinder cin ca cstanding cposition.
Why cdo cyou cneed cscuba ctank cvisual cinspections cand cpressure ctests cand chow
coften care cthey cdone? c- cCORRECT cANS✔✔to ckeep cthe cmaintenance cof cthe
ccylinder cand cto cknow cit cis cproperly cworking. cthe cvisual cinspection cis cdone
cannually. cthe cpressure ctest cis cdone cevery ctwo cto cfive cyears.
