NAUI Open Water E-learning Practice Test

These questions are part of the practice quiz. Start practicing

• A diver with blood and mucous in his/her mask upon surfacing will most likely have:
• During a buoyancy check, buoyancy is neutral when you float at eye level with a normal breath. Which statement best reflects this test result?
• What is the primary purpose of weighting systems for divers wearing a wetsuit?
• Which of the following most readily provides assistance to a diver
• The term that describes the amount of water vapor in the air is?
• Immediately upon reaching the dive site, you should:
• The minimum surface interval required to avoid decompression after a dive to 88 ft for 18 minutes, followed by a dive to 78 ft for 23 minutes is
• Which statement about the speed of sound in water is true?
• Hydrostatic and visual inspection standards vary by region; you should consult your local NAUI facility to learn the regulations in your area. Is this statement True or False?
• Diving equipment should be
• Which option states all NAUI-sanctioned specialty courses are listed?
• A diver with group letter 'F' performing a 60 ft dive has a residual nitrogen time of 35 minutes.
• You and your buddy should don your scuba units _____.
• Which stage reduces tank pressure to intermediate pressure?
• Engraved markings on scuba tanks include which of the following?
• You should dive ______ your buddy.
• What is the recommended method for handling diving gear after use?
• When donning a weight belt, you should ensure that it _____.
• Which choice represents the complete set of NAUI-sanctioned specialty courses?
• What is the most important feature of a weight belt?
• Is special training required to use a dry suit?
• For anchored boat dives, what is recommended to deploy?
• A sealed balloon filled with air that has volume of 6 cubic inches at 99 feet will have a volume of _____ cubic inches at 33 feet
• The objective of an entry is to _____.
• Select the option that enumerates all NAUI-sanctioned specialty courses.
• Two common materials that scuba tanks are made from are steel and _________.
• If you are entering the water from a small boat, use the ____ entry.
• Which of the following is not one of the three general types of lung overexpansion injuries?
• Where are the rules for using a specific RGBM table found?
• Which type of suit is designed to be worn with insulating undergarments to remain dry?
• The NAUI Diving Hand Signals are standard in the United States diving community and are usually recognized in other countries as well.
• The predictable daily rise and fall of the ocean at a single point is called what?
• Which gas law best explains diving medical problems such as ear and sinus squeeze?
• To prevent air embolism, a diver should
• Before water entry, which area should be checked to ensure safety?
• When selecting a face mask, the most important thing to consider is
• Breathing dry air, scuba divers tend to become dehydrated while diving due to?
• It is recommended that a dive team diving from an anchored boat begin their dive
• Two recommended methods of clearing your snorkel are the blast and the _____ clear.
• A diving watch must be able to withstand pressure and measure ____.
• What material is foam neoprene used for wetsuits?
• Most surface waves are caused by which factor?
• Which line on a compass is used to indicate the direction of travel?
• When clearing water from a mask with a purge valve, which head position is recommended?
• True or False: You will float if weighted for neutral buoyancy in salt water and you dive freshwater with the same weight.
• A dive buddy reports shoulder ache one hour after the dive; which condition might you suspect?
• A diver experiencing panic should:
• Which of the following is an example of an overhead environment?
• Which statement best describes the surface interval?
• Which of the following are NAUI-sanctioned specialty courses?
• A ____ is made from foam neoprene.
• Which stage reduces working tank pressure to intermediate pressure?
• When buying or renting equipment for diving, the most important consideration is
• In NAUI planning, the group letter is used to determine residual nitrogen time.
• When rinsing a regulator, the best practice is to
• Which methods can clear water from the regulator second stage?
• Which choice solely represents the group of NAUI-sanctioned specialty courses?
• From the options below, identify the NAUI-sanctioned specialty courses.
• Which condition is commonly caused by inability to equalize pressure in air-filled spaces during descent?
• Which term describes the underwater movement of water caused by wave action near shore?
• The first dive is to 60 ft for 50 minutes. You spend one hour and 40 minutes on the surface, what is your adjusted maximum dive time at 60 ft?
• When you clear water from a mask with a purge valve, you tilt your head:
• If air in a tank is suspected contaminated due to its smell or taste, what should you do?
• Which of the following limits should be established prior to every scuba dive?
• Examples of natural navigation aids divers may use during dives include:
• During a buoyancy check, what kind of breath should be used to test buoyancy?
• Sound travels about _____ times faster in water than in air
• What is attached at the end of the trail line?
• Which statement about buoyancy during a dive is correct?
• What happens to the volume of a trapped gas as depth increases if no adjustments are made?
• Which option is the complete set of NAUI-sanctioned specialty courses, as listed here?
• Which factor is NOT a consideration when calculating residual nitrogen time?
• Which item is considered an essential feature on all buoyancy compensators?
• Which statement about NAUI RGBM dive tables is true?
• ______ is a worldwide emergency network of hyperbaric chambers and diving physicians
• A depth equivalent to one atmosphere of pressure in seawater is equal to what depths in seawater and freshwater, respectively?
• Which item is used as insulating undergarments with a dry suit?
• To orient yourself to locale-specific diving procedures, who should you contact?
• Which of the following is an example of a man-made site?
• Pressure in the middle ear is equalized through which part of the body?
• Which statement is NOT a supported feature of NAUI RGBM tables?
• Which of the following physical factors can make you incapable of sustaining efforts sometimes demanded when participating in recreational diving?
• Which of the following is NOT listed as a useful accessory?
• When planning and executing a dive, divers should:
• The following rate of ascent for diving is acceptable when using the USN/NAUI dive tables?
• You should have a contingency plan for:
• What is the absolute pressure in the ocean at 16 meters (53 feet) depth?
• Newly certified divers who desire additional training and an orientation to a variety of diving sites and conditions should take a NAUI _____.
• A diver can reduce fogging of the mask by?
• A diver's body heat is lost through conduction (primarily) at a rate of approximately ____ times more rapidly than in air.
• Which of the following is part of proper maintenance for dive instruments?
• According to NAUI, a repetitive dive is defined as more than one dive within a period of ______ hours.
• After completing this entry-level course, you are knowledgeable and skillful enough to dive safely in open water with conditions similar to those in which you were trained.
• What unit is used to express absolute underwater pressure?
• Which entry method is appropriate when approaching the water from a dock with several feet of water below?
• Who should service your regulator?
• A scuba cylinder valve is opened by turning it clockwise.
• When donning a weight belt, what should you ensure about its removal?
• A reciprocal course is made when your outbound course is a straight line and halfway through your dive you make a _____ turn.
• A ____ plan is a written plan of your destination and your expected time of return that is left with someone on shore so they can summon help if you do not return within a reasonable time
• Which parameter is most directly linked to the occurrence of a thermocline?
• A thermocline is a thin zone of rapid change in water ____.
• Among the following, which option asserts all three listed courses are NAUI-sanctioned?
• Snorkels over 15 inches in length are not recommended primarily because
• Continued loss of body heat in cold water will produce:
• When rinsing a regulator, the best practice is to
• If the distance to the water is several feet, use the giant stride entry.
• If you and your buddy become separated, what is the recommended action?
• Diving with a computer offers which advantage compared to using only dive tables?
• Which of the following factors affects visibility?
• A sign of decompression sickness can include?
• When divers are not in the water, what should you do with the dive flag?
• Which statement about using RGBM tables for a dive is correct?
• Which ascent type is used when you run out of air at shallower depths?
• Atmospheric pressure at sea level is:
• Nitrogen narcosis can impair judgment similar to intoxication with which substance?
• Dives to less than 6 m (20 feet) are considered as 6 m (20 foot) dives in NAUI dive tables.
• The dive knife is used primarily as a _____ for digging, cutting, pounding, and prying.
• Which option reflects the full group of NAUI-sanctioned specialty courses?
• Diving deeper than approximately 6 meters (20 feet) and then ascending can lead to nitrogen bubble formation.
• To relieve a cramp in the calf
• What is the recommended approach to dive planning with RGBM tables?
• The first color lost in the spectrum upon descent during diving is ___.
• True or False: An emergency swimming ascent is performed when you run out of air at shallow depths (about 18 meters / 60 feet).
• During ascent, a diver who cannot equalize the ears could experience which condition?
• Alcohol consumption should be avoided within how many hours of a planned dive?
• When diving from an anchored boat, what is the recommended entry direction?
• Skip breathing can cause which gas buildup during a dive?
• Which statement about altitude and RGBM usage is true?
• Computers and dive tables will eliminate the risk of DCS.
• From a small boat, which entry minimizes forward momentum when entering the water?
• True or False: If you are careless about your buoyancy control you can break off pieces of coral or rub off its protective coating.
• When assembling your scuba unit, the outlet from the cylinder valve should be pointed toward the diver's head.
• During a buoyancy check, neutral buoyancy is indicated when you float at eye level with a normal breath.
• An irregular breathing pattern (skip breathing) while diving will possibly cause:
• Which statement about the training environment for this certification is true?
• Which of the following is a natural underwater site commonly encountered by divers?
• If you are able to sit at the edge of the water, use the _____ entry.
• What is the most effective way to descend while maintaining orientation and attempting equalization of the ears?
• To optimize no-decompression bottom times, plan repetitive dives so that each successive dive is to a ______ depth.
• What describes the blast snorkel clear?
• Which statement about no-decompression dives is true?
• A NAUI open water scuba diver should not dive deeper than 18 meters (60 feet).
• Your entry-level NAUI Scuba Diver certification is a license to _____.
• The last thing to check before making a giant stride or any water entry is that the area below is clear.
• True or False: If the mouthpiece is out of your mouth, you should continuously exhale a small stream of bubbles.
• Most diving problems occur
• Regarding dive planning with RGBM tables, which statement is correct?
• From the options below, which includes every NAUI-sanctioned specialty course?
• Due to refraction, underwater objects appear _____ and _____ when viewed through a diver's mask?
• If a diver's surface air consumption rate is 1.72 bar per minute, what is the rate at 20 meters depth?
• An additional accessory that will be useful to you is ____.
• Which statement is true about gas behavior in a rigid container?
• Which of the following will help to prevent seasickness
• Which item offsets wetsuit compression with depth?
• Why should scuba tanks always have some pressure in them?
• Which option lists all NAUI-sanctioned specialty courses?
• Why is physical fitness an important consideration for scuba divers?
• In assisting a diver in distress, which person is typically first to provide help?
• When donning your cylinder at the surface and underwater, the primary difference is that you want to be:
• Which of the following is a legitimate reason to log dives?
• Is it true that you do not need special training to use a dry suit?
• The maximum dive time for a dive to 60 ft is ____ minutes.
• Which item is useful for underwater communication?
• The phrase 'license to learn' implies that the certification authorizes you to
• Which line on a compass is the direction of travel?
• ____ is the underwater movement of water caused by wave action that you will experience when diving in areas close to shore.
• The three general types of injury resulting from lung overexpansion are air embolism, pneumothorax, and ___
• Divers Alert Network (DAN) is best described as
• When a diver is distressed, which approach is recommended if possible?
• Local dive clubs are an excellent way to
• Which device calculates your remaining allowed bottom time during a dive?
• If you wave to someone from the surface, it is a sign of distress, NOT a way to say hello.
• Are hydrostatic and visual inspection standards identical worldwide?
• In a rigid container full of gas, increasing the surrounding temperature causes the gas pressure to?
• When wearing an exposure suit, to safely control buoyancy as you descend, you should _____.
• When selecting diving equipment for personal use, what is the most important consideration?
• Symptoms of nitrogen narcosis are similar to which condition?
• Why should you record all dives in your logbook?
• Open heel fins are usually the fins of choice because
• In shallow water, how often should you check your submersible pressure gauge?
• Two methods of measuring air pressure are BAR or:
• If you must walk in fins, you must walk _____.
• When the pressure of nitrogen is balanced between the air and your body, you are in a state of?
• The minimum surface interval recommended between two dives is ______ minutes.
• Which force primarily generates most ocean surface waves?
• What type of pressure is defined as gauge (water) pressure plus atmospheric (air) pressure)?
• The ___ clear of your snorkel requires the least amount of energy.
• A ____ is suitable for warm, tropical diving?
• Which of the following NAUI specialty courses are recognized?
• What is the purpose of a float plan as described?
• Almost all injuries from aquatic life are caused by which type of action by the animal?
• If you and your buddy become separated, which option describes the recommended course of action?
• When clearing water from a mask without a purge valve, which head position helps most to clear the water?
• Underwater heat loss occurs approximately how many times faster than in air?
• Why is proper buoyancy control important in reef areas?
• You can prevent a mask from fogging underwater by lowering the?
• You may need to don or remove your equipment in the water if:
• Sea water weighs how many kilograms per liter and how many pounds per cubic foot?
• Which describes a regular breathing pattern while diving?
• The ambient pressure at 10 meters (33 feet) is approximately:
• Three main types of buoyancy compensators (BCs) are which of the following?
• During descent, which color is lost first?
• Identify the option that names all NAUI-sanctioned specialty courses.
• Why should you rinse your BC internally?
• A common symptom of carbon monoxide poisoning is often?
• Which of the following best describes natural navigation aids?
• Weighting systems are used primarily to?
• During a buoyant emergency ascent, which action helps you reach the surface more effectively?
• What is the primary purpose of an exposure suit during dives?
• What length of trail line is recommended for a dive from an anchored boat?
• True or False: Your body weight does not affect your buoyancy.
• Currents which suddenly appear and disappear are called what?
• What is the approximate depth in meters of 60 feet?
• Dive computers, compared to dive tables, are said to provide safety benefits by:
• Which of the following describes the Divers Alert Network (DAN)?
• A diver's inability to equalize his/her ears during ascent could cause:
• At 20 meters depth, the ambient pressure is approximately:
• The amount of water vapor in the air is known as?
• Which belt compensates for wetsuit compression as you descend?
• What depth in seawater corresponds to one atmosphere of pressure?
• There are many opportunities to work as a diving professional.
• Which of the following is an appropriate first aid measure for decompression sickness?
• To prevent losing your balance when donning fins, you can _____.
• Four main actions you should consider in giving first aid for diving accidents are:
• Which statement best describes the scope of the entry-level course regarding where you should be able to dive?
• True or False: A buoyant emergency ascent at greater depths involves dropping your weight belt and exhaling slowly all the way to the surface.
• A ____ calculates your remaining allowable bottom time while diving
• According to Boyle's law, if the ambient pressure doubles, the volume of a trapped gas
• Which of the following is an example of a natural site?
• Which action is included among the four main actions in first aid for diving accidents?
• During descent, a diver's buoyancy tends to _____.
• Which of the following would be categorized as NAUI-sanctioned specialty courses?
• What is the point at which a sudden change in water temperature occurs?
• What is the best way to become familiar with diving procedures in a new locale after tropical training?
• According to common diving guidance, most diving problems occur where?
• Which action should accompany safe diving planning to ensure clear responsibility for decisions?
• Which option contains the complete list of NAUI-sanctioned specialty courses?
• When you fly a dive flag, you must _____.