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Exam (elaborations)

NAUI QUESTIONS & ANSWERS(RATED A)

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  • Course
  • Naui scuba
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  • Naui Scuba

Which of the following is an essential feature to consider when selecting a diving mask? a) Purge valve. b) High internal volume. c) Tempered or safety glass. d) Metal frame. - ANSWER c Snorkels over 15 inches (38 centimeters) in length are not recommended primarily because: a) They have to...

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  • September 15, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • naui
  • Naui scuba
  • Naui scuba
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shantelleG
NAUI QUESTIONS & ANSWERS(RATED A)

Which of the following is an essential feature to consider when selecting a diving mask?

a) Purge valve.

b) High internal volume.

c) Tempered or safety glass.

d) Metal frame. - ANSWER c



Snorkels over 15 inches (38 centimeters) in length are not recommended primarily because:

a) They have too much dead air space.

b) They are likely to become tangled.

c) They are not economical to manufacture.

d) They are top-heavy and difficult to use. - ANSWER a



When buying or renting equipment for diving, the most important consideration is:

a) Its cost.

b) Its fit on your body.

c) How recently it was developed.

d) Its durability. - ANSWER b



Three features that are common to all buoyancy control devices are:

a) An integrated weight system, bright color, inflation/deflation hose.

b) An overpressure relief valve, CO2 inflation cartridge, alternate air source.

c) An alternate air source, low pressure inflator, overpressure relief valve.

d) An overpressure relief valve, inflation/deflation hose, low pressure inflator hose. - ANSWER d




The _________ line is the direction of travel line on the compass.

, a) index/tick mark

b) lubber

c) degree

d) descent - ANSWER b



The dive knife is used primarily as a _________ for digging, cutting, pounding and prying.

a) weapon b) file

c) tool

d) measure - ANSWER c



Atmospheric pressure at sea level is:

a) 29.4 pounds per square inch/ 2.0 atmospheres absolute (2.03 bar).

b) 14.7 pounds per square inch/1.0 atmosphere absolute (1.01 bar).

c) 44.1 pounds per square inch/ 3.0 atmospheres absolute (3.04 bar).

d) 58.8 pounds per square inch/ 4.0 atmospheres absolute (4.05 bar). - ANSWER b



A sealed balloon filled with air that has a volume of 4 liters at 99 feet of seawater (30.2 m) will have a
volume of ____________ at 33 feet of seawater (10.1 m).

a) 2 liters.

b) 12 liters.

c) 8 liters.

d) 16 liters. - ANSWER c



The weight of freshwater is:

a) 84.0 pounds per cubic foot (1345 kg/m3).

b) 52.4 pounds per cubic foot (839 kg/m3).

c) 62.4 pounds per cubic foot (1000 kg/m3).

d) 64.0 pounds per cubic foot (1025 kg/m3). - ANSWER c

, Air, the gas most commonly used by recreational scuba divers, is composed of:

a) 81% nitrogen, 19% oxygen, trace gasses.

b) 68% nitrogen, 32% oxygen, trace gasses.

c) 78% nitrogen, 21% oxygen, trace gasses.

d) 64% nitrogen, 36% oxygen, trace gasses. - ANSWER c



Which of the following causes objects to appear larger and closer when looking through a mask during a
dive?

a) reflection

b) dispersion

c) absorption

d) refraction - ANSWER d



Sound travels approximately how many times faster in water than in air?

a) 2.

b) 4.

c) 5.

d) 8. - ANSWER b



A diver's body heat is lost through conduction (primarily) at a rate of approximately _________ times
more rapidly than in air.

a) 10

b) 25

c) 30

d) 15 - ANSWER b



Which of the following actions should a diver take to reduce drag and therefore the amount exertion
during a dive?

a) Add weight to the weight belt or weight system after properly weighted.

b) Streamline his/her body position.

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