NAUI Diver Master Exam (New 2024/ 2025
Update) Questions and Verified Answers|
100% Correct| A Grade
QUESTION
What is the difference in weight between three cubic feet (85 liters) of fresh water and the same
volume of sea water?
Answer:
4.8 pounds (2.2 kg)
QUESTION
A dive team wants to recover (lift) a 380 pound (172 kg)(dry weight) anchor from the bottom of
the ocean. The anchor displaces 3 cubic feet (85 liters) of sea water. The bottom composition is
flat and firm. How many lift bags, rated for 50 pounds (23 kg) of lift each, will it take to recover
(lift) the anchor?
Answer:
4 bags
QUESTION
The pressure exerted by any component gas in a mixture is termed the _____ of that gas.
Answer:
Partial pressure
QUESTION
The air (or other breathing mixture) that a diver breathes at depth is delivered to the diver by the
regulator at _____.
Answer:
,Ambient pressure
QUESTION
Which of the following is an example of an injury explained by or attributed to Boyle's Law?
Answer:
Equalization of air spaces
Reverse blocks
Lung rupture injuries
QUESTION
One way that heat loss occurs during diving activity is through _____.
Answer:
Conduction
QUESTION
Henry's Law states that the amount of gas that will dissolve into a solution is _____ proportional
to the partial pressure of that gas and _____ proportional to the absolute temperature.
Answer:
directly; inversely
QUESTION
The absolute pressure at 75 feet (23 meters) of sea water is:
Answer:
3.27 ata/48.07 psia/3.3 bar
QUESTION
, A sealed flexible container with 10 liters of air in it is submerged to a depth of 82 feet (25
meters) in the ocean. Providing there is no temperature change in the water between the surface
and at 82 feet (25 meters), what is the new volume in the container at 82 feet (25 meters)?
Answer:
2.87
QUESTION
An air consumption rate of 40 psig (2.76 bar) per minute using a 3,000 psig/80 cubic foot (207
bar/11 liter wet volume) cylinder is equal to?
Answer:
1.07 cubic feet per minute (30 liters per minute)
QUESTION
If a diver has a Surface Air Consumption rate of 30 psig (2.07 bar) per minute with an 80 cubic
foot/3000 psig (207 bar/11 liter wet volume) cylinder, the same cylinder will last approximately
_____ minutes at a depth of 90 feet (27 meters) of sea water if the diver begins his/her ascent
with 1000 psig (69 bar) remaining as a safety measure.
Answer:
18
QUESTION
If a cylinder contains 80 cubic feet (2265 liters) of air at a pressure of 3000 psig (207 bar),
approximately how many cubic feet (liters) of air remains in the cylinder at a pressure of 2200
psig (152 bar) if the cylinder temperature remains constant?
Answer:
58.6 cubic feet (1659 liters)
QUESTION
Update) Questions and Verified Answers|
100% Correct| A Grade
QUESTION
What is the difference in weight between three cubic feet (85 liters) of fresh water and the same
volume of sea water?
Answer:
4.8 pounds (2.2 kg)
QUESTION
A dive team wants to recover (lift) a 380 pound (172 kg)(dry weight) anchor from the bottom of
the ocean. The anchor displaces 3 cubic feet (85 liters) of sea water. The bottom composition is
flat and firm. How many lift bags, rated for 50 pounds (23 kg) of lift each, will it take to recover
(lift) the anchor?
Answer:
4 bags
QUESTION
The pressure exerted by any component gas in a mixture is termed the _____ of that gas.
Answer:
Partial pressure
QUESTION
The air (or other breathing mixture) that a diver breathes at depth is delivered to the diver by the
regulator at _____.
Answer:
,Ambient pressure
QUESTION
Which of the following is an example of an injury explained by or attributed to Boyle's Law?
Answer:
Equalization of air spaces
Reverse blocks
Lung rupture injuries
QUESTION
One way that heat loss occurs during diving activity is through _____.
Answer:
Conduction
QUESTION
Henry's Law states that the amount of gas that will dissolve into a solution is _____ proportional
to the partial pressure of that gas and _____ proportional to the absolute temperature.
Answer:
directly; inversely
QUESTION
The absolute pressure at 75 feet (23 meters) of sea water is:
Answer:
3.27 ata/48.07 psia/3.3 bar
QUESTION
, A sealed flexible container with 10 liters of air in it is submerged to a depth of 82 feet (25
meters) in the ocean. Providing there is no temperature change in the water between the surface
and at 82 feet (25 meters), what is the new volume in the container at 82 feet (25 meters)?
Answer:
2.87
QUESTION
An air consumption rate of 40 psig (2.76 bar) per minute using a 3,000 psig/80 cubic foot (207
bar/11 liter wet volume) cylinder is equal to?
Answer:
1.07 cubic feet per minute (30 liters per minute)
QUESTION
If a diver has a Surface Air Consumption rate of 30 psig (2.07 bar) per minute with an 80 cubic
foot/3000 psig (207 bar/11 liter wet volume) cylinder, the same cylinder will last approximately
_____ minutes at a depth of 90 feet (27 meters) of sea water if the diver begins his/her ascent
with 1000 psig (69 bar) remaining as a safety measure.
Answer:
18
QUESTION
If a cylinder contains 80 cubic feet (2265 liters) of air at a pressure of 3000 psig (207 bar),
approximately how many cubic feet (liters) of air remains in the cylinder at a pressure of 2200
psig (152 bar) if the cylinder temperature remains constant?
Answer:
58.6 cubic feet (1659 liters)
QUESTION
