Exam 2 & Exam 3: DIT121/ DIT 121 (Latest 2024/ 2025
Updates STUDY BUNDLE PACKAGE WITH SOLUTIONS)
Questions and Verified Answers| Grade A | 100%
Correct
Which of the following describes the term "positive buoyancy"? - ANSWERAn object
displaces an amount of water weighing more than itself
Three factors that adversely affect a diver's air consumption rate are? -
ANSWERLarge physical size, high anxiety, poor fitness level
Pressure in the middle ear is equalized through a part of the body called the ? -
ANSWEREustachian tube
A scuba diver tends to become dehydrated while diving due to? -
ANSWERMoisturizing dry inhaled air
Symptoms of nitrogen narcosis are similar to? - ANSWERAlcoholic intoxication
Stamped (engraved) marking on a scuba tanks include? - ANSWERA block or reverse
squeeze.
An irregular breathing pattern (skip breathing) while diving will possibly cause? -
ANSWERCarbon dioxide excess
Generally, for maximum efficiency, your breathing should be? - ANSWERSlightly
slower and deeper than you normally breathe.
Which of the following causes objects to appear larger and closer when looking
through a mask during a dive? - ANSWERRefraction
Sound travels approximately how many times faster in water than in air? - ANSWER4
A diver's body heat is lost through conduction (primarily) at a rate of approximately
_________times more rapidly than in air. - ANSWER25
Which of the following actions should a diver take to reduce drag and therefore the
amount exertion during a dive? - ANSWERStreamline his/her body position
The absolute pressure in the ocean at 53 feet is? - ANSWER2.6 atmospheres absolute
(2.6 bar)
If a diver's surface air consumption rate is 30 psi per minute (2.1 bar per minute),
what would be his/her consumption rate at 66 feet of seawater? - ANSWER90 psi per
minute (6.2 bar per minute)
, A depth that is equivalent to the atmosphere in the ocean is equal to _____ feet in
seawater and _______ feet in freshwater. - ANSWER33, 34
Two methods of measuring air pressure are BAR or? - ANSWERPounds per square
inch
Atmospheric pressure at sea level is? - ANSWER14.7 pounds per square inch/1.0
atmosphere absolute (1.01 bar)
A sealed balloon filled with air that has a volume of 4 liters at 99 feet of seawater will
have a volume of _____________ at 33 feet of seawater. - ANSWER8 liters
The weight of freshwater is? - ANSWER62.4 pounds per cubic foot (1000 kg/m3)
Air, the gas most commonly used by recreational scuba divers, is composed of? -
ANSWER78% nitrogen, 21% oxygen, trace gases
Two types of materials that scuba tanks are made from are steel and ? -
ANSWERAluminum
The ________ line is the direction of travel line on the compass. - ANSWERLubber
The dive knife is used primarily as a _________ for digging, cutting, pounding, and
prying - ANSWERTool
Stamped (engraved) marking on a scuba tanks include? - ANSWERDate of hydrostatic
test, serial number, type of material
The primary purpose of the exposure suit is to? - ANSWERPreserve body heat during
dives
At a minimum, while diving most dive computers display? - ANSWERMaximum
depth, current depth, actual bottom time, remaining allowable bottom time.
You should have your regulator serviced by a certified repair technician? -
ANSWERAt least once per year
The stage of the regulator which reduces tan pressure is? - ANSWERThe first stage
Three features that are common to all buoyancy control devices are? - ANSWERAn
over pressure relief valve, inflation/deflation hose, low pressure inflator hose.
Three types of alternate air sources that are in common use today are? -
ANSWEROctopus rigs, completely redundant systems, an integrated regulator into
the BCD inflation/deflation hose.
Updates STUDY BUNDLE PACKAGE WITH SOLUTIONS)
Questions and Verified Answers| Grade A | 100%
Correct
Which of the following describes the term "positive buoyancy"? - ANSWERAn object
displaces an amount of water weighing more than itself
Three factors that adversely affect a diver's air consumption rate are? -
ANSWERLarge physical size, high anxiety, poor fitness level
Pressure in the middle ear is equalized through a part of the body called the ? -
ANSWEREustachian tube
A scuba diver tends to become dehydrated while diving due to? -
ANSWERMoisturizing dry inhaled air
Symptoms of nitrogen narcosis are similar to? - ANSWERAlcoholic intoxication
Stamped (engraved) marking on a scuba tanks include? - ANSWERA block or reverse
squeeze.
An irregular breathing pattern (skip breathing) while diving will possibly cause? -
ANSWERCarbon dioxide excess
Generally, for maximum efficiency, your breathing should be? - ANSWERSlightly
slower and deeper than you normally breathe.
Which of the following causes objects to appear larger and closer when looking
through a mask during a dive? - ANSWERRefraction
Sound travels approximately how many times faster in water than in air? - ANSWER4
A diver's body heat is lost through conduction (primarily) at a rate of approximately
_________times more rapidly than in air. - ANSWER25
Which of the following actions should a diver take to reduce drag and therefore the
amount exertion during a dive? - ANSWERStreamline his/her body position
The absolute pressure in the ocean at 53 feet is? - ANSWER2.6 atmospheres absolute
(2.6 bar)
If a diver's surface air consumption rate is 30 psi per minute (2.1 bar per minute),
what would be his/her consumption rate at 66 feet of seawater? - ANSWER90 psi per
minute (6.2 bar per minute)
, A depth that is equivalent to the atmosphere in the ocean is equal to _____ feet in
seawater and _______ feet in freshwater. - ANSWER33, 34
Two methods of measuring air pressure are BAR or? - ANSWERPounds per square
inch
Atmospheric pressure at sea level is? - ANSWER14.7 pounds per square inch/1.0
atmosphere absolute (1.01 bar)
A sealed balloon filled with air that has a volume of 4 liters at 99 feet of seawater will
have a volume of _____________ at 33 feet of seawater. - ANSWER8 liters
The weight of freshwater is? - ANSWER62.4 pounds per cubic foot (1000 kg/m3)
Air, the gas most commonly used by recreational scuba divers, is composed of? -
ANSWER78% nitrogen, 21% oxygen, trace gases
Two types of materials that scuba tanks are made from are steel and ? -
ANSWERAluminum
The ________ line is the direction of travel line on the compass. - ANSWERLubber
The dive knife is used primarily as a _________ for digging, cutting, pounding, and
prying - ANSWERTool
Stamped (engraved) marking on a scuba tanks include? - ANSWERDate of hydrostatic
test, serial number, type of material
The primary purpose of the exposure suit is to? - ANSWERPreserve body heat during
dives
At a minimum, while diving most dive computers display? - ANSWERMaximum
depth, current depth, actual bottom time, remaining allowable bottom time.
You should have your regulator serviced by a certified repair technician? -
ANSWERAt least once per year
The stage of the regulator which reduces tan pressure is? - ANSWERThe first stage
Three features that are common to all buoyancy control devices are? - ANSWERAn
over pressure relief valve, inflation/deflation hose, low pressure inflator hose.
Three types of alternate air sources that are in common use today are? -
ANSWEROctopus rigs, completely redundant systems, an integrated regulator into
the BCD inflation/deflation hose.
