NAUI Master Scuba Diver UPDATED ACTUAL Questions and
CORRECT Answers
What is the difference in weight between 3 cubic feet (85 - 4.8 pounds (2.2kg)
Liters) of fresh water and the same volume of sea water?
- 4.8 pounds (2.2kg)
- 3.8 pounds (1.7kg)
- 4.0 pounds (1.8kg)
- 5.8 pounds (2.6kg)
Increased stress during a deep dive can result in mental - The effects of narcosis
and perceptual narrowing. This perceptual narrowing
may create "taskloading" which can involve which of the
following?
- The effects of narcosis
- Increased mental relaxation
- Greater control of buoyancy
- More available light
Good aerobic fitness increases ___. - Your tolerance to cold
- Your air consumption
- your stress level
- Your tolerance to cold
-Your risk of DCS
,When considering a regulator for purchase or use, an - high; low
important point to remember is that certain regulators
may not be capable of delivering ___ flow rates at ___
cylinder pressure during an air sharing emergency.
- low; high
- high; low
- low; low
- high; high
Which navigational techniques are often used to locate a - Natural and compass position-fixing navigation
dive site?
- Compass and airborne navigation
- Celestial and path navigation
- Turbid and natural navigation
- Natural and compass position-fixing navigation
The four basic plant and animal life zones in the ocean - Littoral, planktonic, nektontic, benthic
are ___.
- Littoral, planktonic, nektontic, benthic
- Planktonic, nektonic, ecologic, benthic
- Pre-historic, littoral, benthic, deep
- Littoral, subterranean, benthic, nektonic
Serious physiological risk factor that is associated with - Central nervous system oxygen toxicity
the use of nitrox is ___.
- Ear squeeze
- Red blood cell dilution
- Central nervous system oxygen toxicity
- Shallow water blackout
The partial pressure of oxygen in air at a depth of 132 feet - 1.05 ata/ 15.42 psia/ 1.06 bar
(40 meters) of seawater is:
- 0.95 ata/ 13.42 psia/ 0.9 bar
- 1.05 ata/ 15.42 psia/ 1.06 bar
- 1.25 ata/ 16.42 psia/ 1.13 bar
- 2.05 ata/ 19.42 psia/ 1.34 bar
Which regulator second stage design uses air pressure - Pilot
rather than mechanical leverage to open the main valve?
- Unbalanced
- Torque
- Fluid
- Pilot
The term "half-time" is the length of time it takes a specific - 50
tissue to become ___% saturated with nitrogen.
- 50
- 100
- 33
- 66
, A dive team diving in a freshwater lake in the summer is at - 132 cubic inches (2.16 liters)
a depth of 20ft (6 meters). The water temperature at this
depth is 85°F (29°C) and one diver in the team has 244
cubic inches (4 liters) of air in her BC. As the team
descends to a depth of 60 feet (18 meters), they pass
through a thermocline and the water temp is now 55°F
(12°C). If the diver with 244 cubic inches (4 liters) of air in
her BC did not add or remove any air from the
compensator, the new volume in her BC after arrival at 60
feet (18 meters) would be how many liters?
- 193 cubic inches (3.16 liters)
- 152 cubic inches (2.50 liters)
- 187 cubic inches (3.06 liters)
- 132 cubic inches (2.16 liters)
If a visual cylinder inspection reveals corrosion inside a - Tumbling
scuba cylinder, it may require cleaning by a process
called___.
- Stripping
- Tumbling
- Grinding
- Sand blasting
Safety requirements for safe and effective light-salvage - Being able to estimate the correct size of the lift bag, inflate it using an alternate
operation include which of the following? air source, and maintain complete control of the lift bag during ascent.
- Being able to estimate the correct size of the lift bag,
inflate it using an alternate air source, and maintain
complete control of the lift bag during ascent.
- Being unable to tie a bowline, sheet bend, clove hitch,
and two half hitches.
- Being improperly trained for the lift that you intend to
make.
- Attempting a lifting operation without regard for dive
site and environmental area hazards.
The USCG rules state that the international code "A" flag - Blue and white
be displayed if the vessel is conducting diving activities.
The color scheme of the international code "A" flag is ___.
- Red and blue
- Blue and white
- Yellow and red
- Black and yellow
Which of the following valve types incorporates a - DIN valve
"captured o-ring"?
- DIN valve
- K-valve
- Y-valve
- J-valve
CORRECT Answers
What is the difference in weight between 3 cubic feet (85 - 4.8 pounds (2.2kg)
Liters) of fresh water and the same volume of sea water?
- 4.8 pounds (2.2kg)
- 3.8 pounds (1.7kg)
- 4.0 pounds (1.8kg)
- 5.8 pounds (2.6kg)
Increased stress during a deep dive can result in mental - The effects of narcosis
and perceptual narrowing. This perceptual narrowing
may create "taskloading" which can involve which of the
following?
- The effects of narcosis
- Increased mental relaxation
- Greater control of buoyancy
- More available light
Good aerobic fitness increases ___. - Your tolerance to cold
- Your air consumption
- your stress level
- Your tolerance to cold
-Your risk of DCS
,When considering a regulator for purchase or use, an - high; low
important point to remember is that certain regulators
may not be capable of delivering ___ flow rates at ___
cylinder pressure during an air sharing emergency.
- low; high
- high; low
- low; low
- high; high
Which navigational techniques are often used to locate a - Natural and compass position-fixing navigation
dive site?
- Compass and airborne navigation
- Celestial and path navigation
- Turbid and natural navigation
- Natural and compass position-fixing navigation
The four basic plant and animal life zones in the ocean - Littoral, planktonic, nektontic, benthic
are ___.
- Littoral, planktonic, nektontic, benthic
- Planktonic, nektonic, ecologic, benthic
- Pre-historic, littoral, benthic, deep
- Littoral, subterranean, benthic, nektonic
Serious physiological risk factor that is associated with - Central nervous system oxygen toxicity
the use of nitrox is ___.
- Ear squeeze
- Red blood cell dilution
- Central nervous system oxygen toxicity
- Shallow water blackout
The partial pressure of oxygen in air at a depth of 132 feet - 1.05 ata/ 15.42 psia/ 1.06 bar
(40 meters) of seawater is:
- 0.95 ata/ 13.42 psia/ 0.9 bar
- 1.05 ata/ 15.42 psia/ 1.06 bar
- 1.25 ata/ 16.42 psia/ 1.13 bar
- 2.05 ata/ 19.42 psia/ 1.34 bar
Which regulator second stage design uses air pressure - Pilot
rather than mechanical leverage to open the main valve?
- Unbalanced
- Torque
- Fluid
- Pilot
The term "half-time" is the length of time it takes a specific - 50
tissue to become ___% saturated with nitrogen.
- 50
- 100
- 33
- 66
, A dive team diving in a freshwater lake in the summer is at - 132 cubic inches (2.16 liters)
a depth of 20ft (6 meters). The water temperature at this
depth is 85°F (29°C) and one diver in the team has 244
cubic inches (4 liters) of air in her BC. As the team
descends to a depth of 60 feet (18 meters), they pass
through a thermocline and the water temp is now 55°F
(12°C). If the diver with 244 cubic inches (4 liters) of air in
her BC did not add or remove any air from the
compensator, the new volume in her BC after arrival at 60
feet (18 meters) would be how many liters?
- 193 cubic inches (3.16 liters)
- 152 cubic inches (2.50 liters)
- 187 cubic inches (3.06 liters)
- 132 cubic inches (2.16 liters)
If a visual cylinder inspection reveals corrosion inside a - Tumbling
scuba cylinder, it may require cleaning by a process
called___.
- Stripping
- Tumbling
- Grinding
- Sand blasting
Safety requirements for safe and effective light-salvage - Being able to estimate the correct size of the lift bag, inflate it using an alternate
operation include which of the following? air source, and maintain complete control of the lift bag during ascent.
- Being able to estimate the correct size of the lift bag,
inflate it using an alternate air source, and maintain
complete control of the lift bag during ascent.
- Being unable to tie a bowline, sheet bend, clove hitch,
and two half hitches.
- Being improperly trained for the lift that you intend to
make.
- Attempting a lifting operation without regard for dive
site and environmental area hazards.
The USCG rules state that the international code "A" flag - Blue and white
be displayed if the vessel is conducting diving activities.
The color scheme of the international code "A" flag is ___.
- Red and blue
- Blue and white
- Yellow and red
- Black and yellow
Which of the following valve types incorporates a - DIN valve
"captured o-ring"?
- DIN valve
- K-valve
- Y-valve
- J-valve
