SCUBA Diving Test NAUI Questions
and Answers8
What is the most commonly used tank today? - ANSWERS-80 cubic-foot aluminum tank
What will the divers have to do when using the 80 cubic-foot aluminum tank? - ANSWERS-add 3
more pounds of weight
Should you leave a tank empty? - ANSWERS-no
How full should you leave a tank at least? - ANSWERS-300-500 psi
Cylinders are placed in water to avoid what? Why? - ANSWERS--overheating
-the increase in heat causes a higher reading on the gauge
DOT ? - ANSWERS--Department of Transportation stamp
-confirms the tank has been approved for use
-prior to 1970, ICC for Interstate Commerce Commision
ICC ? - ANSWERS-Interstate Commerce Commision
"3AL E6498" - ANSWERS--designates type of alloy
-in this case, aluminum
-not all have this exact same one, it is an example
, "3000" - ANSWERS--working pressure in pounds per square inch (psi) of the cylinder (in this
case aluminum)
-for old steel cylinders the working pressure is 2250 psi
-there are higher pressure cylinders on market today
-these tanks (higher pressure ones) would have a DIN valve (most commonly used on steel high
pressure tanks)
"123456" - ANSWERS--serial number
-all tanks have a different one
"9(I)80" - ANSWERS--stamped on neck of cylinder
-stamp is hydrostatic test date of cylinder
-(I) is the inspectors registered number or symbol
The hydrostatic test must be completed every ____ ____. - ANSWERS-5 years
Plus + - ANSWERS--on steel cylinders only
-allows cylinder to be 10% over its working pressure
The diving industry requires that all cylinders be visually inspected. This inspection is completed
__________. What is placed on the cylinder to show that the test was completed? Another
inspection with the visual is a ____ ____ ____ of the threads in the cylinder. - ANSWERS--every
year
-sticker is placed on side or bottom of cylinder after inspection
-metal stress crack
Eddie Current ? - ANSWERS--not a required inspection (yet)
-some dive stores are requiring this inspection on your cylinder prior to filling for older cylinders
and Answers8
What is the most commonly used tank today? - ANSWERS-80 cubic-foot aluminum tank
What will the divers have to do when using the 80 cubic-foot aluminum tank? - ANSWERS-add 3
more pounds of weight
Should you leave a tank empty? - ANSWERS-no
How full should you leave a tank at least? - ANSWERS-300-500 psi
Cylinders are placed in water to avoid what? Why? - ANSWERS--overheating
-the increase in heat causes a higher reading on the gauge
DOT ? - ANSWERS--Department of Transportation stamp
-confirms the tank has been approved for use
-prior to 1970, ICC for Interstate Commerce Commision
ICC ? - ANSWERS-Interstate Commerce Commision
"3AL E6498" - ANSWERS--designates type of alloy
-in this case, aluminum
-not all have this exact same one, it is an example
, "3000" - ANSWERS--working pressure in pounds per square inch (psi) of the cylinder (in this
case aluminum)
-for old steel cylinders the working pressure is 2250 psi
-there are higher pressure cylinders on market today
-these tanks (higher pressure ones) would have a DIN valve (most commonly used on steel high
pressure tanks)
"123456" - ANSWERS--serial number
-all tanks have a different one
"9(I)80" - ANSWERS--stamped on neck of cylinder
-stamp is hydrostatic test date of cylinder
-(I) is the inspectors registered number or symbol
The hydrostatic test must be completed every ____ ____. - ANSWERS-5 years
Plus + - ANSWERS--on steel cylinders only
-allows cylinder to be 10% over its working pressure
The diving industry requires that all cylinders be visually inspected. This inspection is completed
__________. What is placed on the cylinder to show that the test was completed? Another
inspection with the visual is a ____ ____ ____ of the threads in the cylinder. - ANSWERS--every
year
-sticker is placed on side or bottom of cylinder after inspection
-metal stress crack
Eddie Current ? - ANSWERS--not a required inspection (yet)
-some dive stores are requiring this inspection on your cylinder prior to filling for older cylinders
