Scuba Final Exam Questions with
Complete Solutions
You should have your regulator serviced by a certified repair technician: - Answer-at
least once per year.
The stage of the regulator which reduces tank pressure is: - Answer-The first stage.
Two types of materials that scuba tanks are made from are steel and _________. -
Answer-aluminum.
The _________ line is the direction of travel line on the compass. - Answer-lubber.
The dive knife is used primarily as a _________ for digging, cutting, pounding and
prying. - Answer-tool.
Stamped (engraved) markings on scuba tanks include: - Answer-Date of hydrostatic
test, serial number, type of material.
Atmospheric pressure at sea level is: - Answer-14.7 pounds per square inch/1.0
atmosphere absolute.
A sealed balloon filled with air that has a volume of 6 cubic inches at 99 feet will have a
volume of ____________ at 33 feet. - Answer-12 cubic inches.
Sea water weighs: - Answer-64.0 pounds per cubic foot.
Which gas law best explains diving medical problems such as ear and sinus squeeze? -
Answer-Boyle's law.
Because of refraction, objects underwater appear _________ and _________ when the
diver is looking through his/her mask. - Answer-larger; closer.
When the pressure of nitrogen is balanced between the air and your body, you are at a
state of _______________. - Answer-equilibrium.
A diver's body heat is lost through conduction (primarily) at a rate of approximately
_________ times more rapidly than in air. - Answer-25
What type of pressure is defined as gauge (water) pressure plus atmospheric (air)
pressure? - Answer-Absolute
The absolute pressure in the ocean at 53 feet is: - Answer-2.6 atmospheres absolute.
, If a diver's surface air consumption rate is 25 psi per minute, what would be the
consumption rate at 66 feet of seawater? - Answer-75 psi per minute
A depth that is equivalent to one atmosphere in the ocean is equal to _________ feet in
sea water and _________ feet in fresh water. - Answer-33; 34
Two methods of measuring air pressure are BAR or _____ . - Answer-pounds per
square inch.
Sound travels about _________ times faster in water than in air. - Answer-4
The first color lost in the spectrum upon descent during a dive is _________ . - Answer-
red
Pressure in the middle ear is equalized through a part of the body called the: - Answer-
Eustachian tube.
Symptoms of Nitrogen Narcosis are similar to: - Answer-Alcoholic intoxication.
A diver's inability to equalize his/her ears during ascent could cause: - Answer-A block
or reverse block.
An irregular breathing pattern (skip breathing) while diving will possibly cause: - Answer-
Carbon dioxide excess.
Generally, for maximum efficiency, your breathing should be: - Answer-slightly slower
and deeper than you normally breathe.
To prevent air embolism, a diver should: - Answer-Breathe normally at all times during
ascent and never hold his/her breath.
A diver with blood and mucous in his/her mask upon surfacing will most likely have: -
Answer-Sinus squeeze.
If your dive buddy complains to you about having aching pain in his/her shoulder one
hour after the dive, you might suspect: - Answer-Decompression sickness.
A Symptom of carbon monoxide poisoning is often: - Answer-Headache.
The following rate of ascent for diving is acceptable when using the USN/NAUI dive
tables: - Answer-30 feet per minute.
Which of the following is the point at which a sudden change in water temperature
occurs? - Answer-A thermocline.
Currents which suddenly appear and disappear are: - Answer-transitory.
Complete Solutions
You should have your regulator serviced by a certified repair technician: - Answer-at
least once per year.
The stage of the regulator which reduces tank pressure is: - Answer-The first stage.
Two types of materials that scuba tanks are made from are steel and _________. -
Answer-aluminum.
The _________ line is the direction of travel line on the compass. - Answer-lubber.
The dive knife is used primarily as a _________ for digging, cutting, pounding and
prying. - Answer-tool.
Stamped (engraved) markings on scuba tanks include: - Answer-Date of hydrostatic
test, serial number, type of material.
Atmospheric pressure at sea level is: - Answer-14.7 pounds per square inch/1.0
atmosphere absolute.
A sealed balloon filled with air that has a volume of 6 cubic inches at 99 feet will have a
volume of ____________ at 33 feet. - Answer-12 cubic inches.
Sea water weighs: - Answer-64.0 pounds per cubic foot.
Which gas law best explains diving medical problems such as ear and sinus squeeze? -
Answer-Boyle's law.
Because of refraction, objects underwater appear _________ and _________ when the
diver is looking through his/her mask. - Answer-larger; closer.
When the pressure of nitrogen is balanced between the air and your body, you are at a
state of _______________. - Answer-equilibrium.
A diver's body heat is lost through conduction (primarily) at a rate of approximately
_________ times more rapidly than in air. - Answer-25
What type of pressure is defined as gauge (water) pressure plus atmospheric (air)
pressure? - Answer-Absolute
The absolute pressure in the ocean at 53 feet is: - Answer-2.6 atmospheres absolute.
, If a diver's surface air consumption rate is 25 psi per minute, what would be the
consumption rate at 66 feet of seawater? - Answer-75 psi per minute
A depth that is equivalent to one atmosphere in the ocean is equal to _________ feet in
sea water and _________ feet in fresh water. - Answer-33; 34
Two methods of measuring air pressure are BAR or _____ . - Answer-pounds per
square inch.
Sound travels about _________ times faster in water than in air. - Answer-4
The first color lost in the spectrum upon descent during a dive is _________ . - Answer-
red
Pressure in the middle ear is equalized through a part of the body called the: - Answer-
Eustachian tube.
Symptoms of Nitrogen Narcosis are similar to: - Answer-Alcoholic intoxication.
A diver's inability to equalize his/her ears during ascent could cause: - Answer-A block
or reverse block.
An irregular breathing pattern (skip breathing) while diving will possibly cause: - Answer-
Carbon dioxide excess.
Generally, for maximum efficiency, your breathing should be: - Answer-slightly slower
and deeper than you normally breathe.
To prevent air embolism, a diver should: - Answer-Breathe normally at all times during
ascent and never hold his/her breath.
A diver with blood and mucous in his/her mask upon surfacing will most likely have: -
Answer-Sinus squeeze.
If your dive buddy complains to you about having aching pain in his/her shoulder one
hour after the dive, you might suspect: - Answer-Decompression sickness.
A Symptom of carbon monoxide poisoning is often: - Answer-Headache.
The following rate of ascent for diving is acceptable when using the USN/NAUI dive
tables: - Answer-30 feet per minute.
Which of the following is the point at which a sudden change in water temperature
occurs? - Answer-A thermocline.
Currents which suddenly appear and disappear are: - Answer-transitory.
