Dive Master NAUI Exam Question and
Answers 100% Solved | Graded A+
What pressure will a scuba cylinder with a rated working pressure of 3000
psig (207 bar), be exposed to during a hydrostatic test? - ✔✔5000 psig
(345 bar)
Which principle represents one basis for the hydrostatic testing of scuba
cylinders? - ✔✔Permanent expansion
If a visual cylinder inspection reveals corrosion inside a scuba cylinder, it
may require cleaning by a process called: - ✔✔Tumbling
Which of the following is considered proper care of a scuba cylinder? -
✔✔Preventing moisture from entering the cylinder.
Two cylinder valves in common use today are: - ✔✔The K-valve and DIN
valve.
Which valve is an example of a special scuba valve that is required for
certain types of specialty diving such as deep diving with a single cylinder?
- ✔✔Y valve
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,Which internal valve designs are available in the first stage of scuba
regulators? - ✔✔Piston; Diaphragm
Which valve is unaffected by cylinder air pressure with regard to the force
needed to operate the valve? - ✔✔Balanced
Which regulator second stage design uses air pressure rather than
mechanical leverage to open the main valve? - ✔✔Pilot
In the event of a regulator first stage malfunction, which type of valve
design would be likely to eliminate air flow to the diver? - ✔✔Upstream
When considering a regulator for purchase or use, an important point to
remember is that certain regulators may not be capable of delivering
______ flow rates at ______ cylinder pressure during an air sharing
emergency. - ✔✔high; low
Which diving instrument incorporates a Bourdon tube mechanism? -
✔✔Cylinder pressure gauges
Two benefits derived from using an electronic dive computer are _____. -
✔✔Accurate monitoring of ascent rate and, if executing a multi-level diving
profile, avoidance of the maximum time/depth penalty
Green discoloration on the first stage of a scuba regulator indicates _____.
- ✔✔Water has most likely entered the first stage
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, An air compressor used for filling scuba cylinders operates by the principle
of _____. - ✔✔Boyle's Law
Dry suits form a waterproof barrier, but require undergarments to be
effective in cold water - ✔✔True
In order to make an informed decision on equipment purchase, you need to
have a solid educational background concerning the _____ of diving
equipment: - ✔✔Types, Method of operation, Care and maintenance
The distance between successive wave crests is defined as _____. -
✔✔Wavelength
The highest tides are called _____ tides, and the lowest tides are called
_____ tides. - ✔✔spring; neap
Water rocking back and forth in a lake or a bay is defined as _____. -
✔✔Seiching
The effect of the moon on tidal action is about _____. - ✔✔Twice the effect
of the sun
The type of breaking wave that produces the greatest force when breaking
is the _____ breaker. - ✔✔Plunging
3
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
Answers 100% Solved | Graded A+
What pressure will a scuba cylinder with a rated working pressure of 3000
psig (207 bar), be exposed to during a hydrostatic test? - ✔✔5000 psig
(345 bar)
Which principle represents one basis for the hydrostatic testing of scuba
cylinders? - ✔✔Permanent expansion
If a visual cylinder inspection reveals corrosion inside a scuba cylinder, it
may require cleaning by a process called: - ✔✔Tumbling
Which of the following is considered proper care of a scuba cylinder? -
✔✔Preventing moisture from entering the cylinder.
Two cylinder valves in common use today are: - ✔✔The K-valve and DIN
valve.
Which valve is an example of a special scuba valve that is required for
certain types of specialty diving such as deep diving with a single cylinder?
- ✔✔Y valve
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,Which internal valve designs are available in the first stage of scuba
regulators? - ✔✔Piston; Diaphragm
Which valve is unaffected by cylinder air pressure with regard to the force
needed to operate the valve? - ✔✔Balanced
Which regulator second stage design uses air pressure rather than
mechanical leverage to open the main valve? - ✔✔Pilot
In the event of a regulator first stage malfunction, which type of valve
design would be likely to eliminate air flow to the diver? - ✔✔Upstream
When considering a regulator for purchase or use, an important point to
remember is that certain regulators may not be capable of delivering
______ flow rates at ______ cylinder pressure during an air sharing
emergency. - ✔✔high; low
Which diving instrument incorporates a Bourdon tube mechanism? -
✔✔Cylinder pressure gauges
Two benefits derived from using an electronic dive computer are _____. -
✔✔Accurate monitoring of ascent rate and, if executing a multi-level diving
profile, avoidance of the maximum time/depth penalty
Green discoloration on the first stage of a scuba regulator indicates _____.
- ✔✔Water has most likely entered the first stage
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, An air compressor used for filling scuba cylinders operates by the principle
of _____. - ✔✔Boyle's Law
Dry suits form a waterproof barrier, but require undergarments to be
effective in cold water - ✔✔True
In order to make an informed decision on equipment purchase, you need to
have a solid educational background concerning the _____ of diving
equipment: - ✔✔Types, Method of operation, Care and maintenance
The distance between successive wave crests is defined as _____. -
✔✔Wavelength
The highest tides are called _____ tides, and the lowest tides are called
_____ tides. - ✔✔spring; neap
Water rocking back and forth in a lake or a bay is defined as _____. -
✔✔Seiching
The effect of the moon on tidal action is about _____. - ✔✔Twice the effect
of the sun
The type of breaking wave that produces the greatest force when breaking
is the _____ breaker. - ✔✔Plunging
3
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
