Scientific Diver Certification Exam Practice Test

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• If you find yourself exhausted and breathing hard while on the bottom, you should:
• Navigation techniques usually include use of all except
• What should be included in an emergency action plan for diving?
• Why is it important to check local tides and currents before diving?
• What does compliance with local marine laws foster among divers?
• When performing a quick neurological assessment, it is important to note differences in sensation or reflex reaction from:
• What is the most common cause of diver difficulties or incidents?
• Why is it important for divers to understand local marine laws?
• If a diver's one and only computer fails underwater, the diver should:
• What is the primary purpose of training in underwater navigation for divers?
• A cylinder documentation line reads: 3AL3000 4^17. Which of the following is true?
• An irregular breathing pattern (skip breathing) while diving can lead to what consequence?
• Which of the following factors can increase the risk for decompression sickness?
• A dive plan should prioritize what aspect for safety?
• In order to remain active as a scientific diver, a minimum of _____ dives must be made each year.
• What aspect of diving practice helps coordinate research tasks effectively?
• What is essential to remember when recovering an unconscious diver from the bottom?
• As long as a diver stays shallower than which depth, the concern for decompression sickness is minimal?
• What is full in-water CPR primarily noted as?
• What physiological change occurs with increased diving depth?
• What is the ideal rate for in-water rescue breaths?
• Partial pressures and oxygen toxicity can be used to explain why compressed air?
• According to Archimedes Principle, what aspect of the displaced fluid determines the upward force on an immersed object?
• What happens to the buoyant properties of a neoprene wetsuit as depth increases?
• How do you calculate the amount of air needed for a dive?
• Your computer says you have 10 minutes remaining for the dive but your buddy's computer says it is time to ascend. What should you do?
• What is the most likely cause of vertigo experienced during descent?
• What devices are most commonly used to help divers navigate underwater?
• What effect can strong currents have on diving?
• What is the recommended procedure for diving in an unfamiliar area?
• What is a critical factor in preventing accidents while diving?
• What causes the magnification of visual images underwater?
• In what situation is it crucial to perform a hydrostatic test on a scuba cylinder?
• Why is 100% oxygen considered the most important first aid for a dive accident?
• What altitude considerations should a diver keep in mind?
• What is quadrat sampling?
• What describes a situation where the body has absorbed excess nitrogen after surfacing?
• What should divers monitor to ensure a safe diving experience?
• Which piece of equipment is essential for signaling to other divers while underwater?
• The recommended approach for dealing with a reverse block involves:
• What is the main difference between a wetsuit and a dry suit?
• Which of the following is crucial to maintain while diving to avoid nitrogen narcosis?
• What role does photography play in scientific diving?
• What safety gear is considered mandatory for scientific divers?
• Why is it important for divers to understand marine geology during scientific dives?
• What is the reciprocal course for a heading of 235 degrees?
• Why is it important to maintain dive logs?
• When doing a drift dive, you should start your dive:
• How does gas toxicity in diving scenarios vary?
• If you are heading 170 and make a 30 degree turn to the right, what is your new heading?
• Oxygen toxicity can become problematic when breathing compressed air greater than _____ ATA partial pressure.
• How does buoyancy control affect scientific diving?
• What is the primary factor that affects a diver's decision to ascend during a dive?
• The primary function of a dive computer is to assist in what area?
• A diver weighing 170lb / 77kg displaces 3 cubic feet / 85 liters of water. What additional weight is needed for neutral buoyancy in 33ft / 10m of seawater?
• What symptoms may accompany a ruptured eardrum during scuba diving?
• How can divers ensure their health while diving?
• What is the primary purpose of scientific diving?
• An altitude dive is any dive made above _____ feet/meters requiring the use of special conversion tables.
• What phenomenon can occur due to increasing pressure during a dive?
• When is it advisable to drop your weights while diving?
• What can be a consequence of diving when not feeling mentally well?
• Describe two potential hazards of conducting scientific diving.
• Understanding safety stops is crucial for which aspect of diving?
• What is a common hazard divers face at greater depths?
• Using the NOAA air table, what is the maximum no stop dive time for a dive to 55'/16.8m?
• Which factors influence a diver's air consumption rate?
• The portion of the tank valve damaged by over-tightening the valve knob upon shutoff is:
• If you observe a leaf floating in a tide-generated current while anchored, what should you do?
• If a diver needs to go to 75 feet for 30 minutes, but the dive computer's plan mode shows 70 feet for 30 minutes, what should the diver do?
• When viewed through a mask underwater, objects appear to be:
• List 3 areas of the body or pieces of equipment that are subject to barotrauma.
• Why is it crucial to keep accurate field notes during dives?
• What is a method for underwater data collection?
• How can strong currents affect diving schedules?
• What is the purpose of a diving safety manual?
• Why might poor health increase risks for a diver?
• What role does surface support play in scientific diving?
• According to Boyle's Law, as the pressure increases, the volume will ____________, so long as temperature remains constant.
• What is the main purpose of a dive computer?
• What is a potential hazard of diving into low visibility water?
• What is the purpose of pre-dive equipment checks?
• Why is it important to log dive data?
• How can divers minimize their environmental impact during dives?
• If you hear escaping air after connecting your regulator to a full scuba cylinder, what should you do?
• Who is ultimately responsible for the scientific diver's safety?
• What should divers do if they encounter a potentially dangerous species?
• When tasked with significant sampling at a deep site, what strategy should a diver consider if partnered with one other diver?
• How do you assess dive conditions before entering the water?
• What role does marine biology knowledge play in scientific diving?
• When should you NOT make a dive?
• Why is teamwork crucial in scientific diving?
• How can a PFO (patent foramen ovale) impact DCI (decompression illness)?
• When breath-hold diving, hyperventilation will allow a diver to stay submerged longer by:
• What is the function of a dive computer?
• Adam surfaces from a cold dive feeling pressure behind his eyes, and reporting bloody water in his mask, but no other signs or symptoms. As team leader, you should suspect:
• What role does communication play in scientific diving teams?
• Which of the following actions can likely cause a pneumothorax?
• What does a conservative approach to safety stops require?
• What is the term used for the direction of travel on the compass?
• What is the recommendation for buddy dive checks?
• What is a key method for preventing getting lost underwater?
• What might a diver carry to improve safety during a dive?
• What distinguishes a "scientific dive" from a recreational dive?
• When do symptoms of Arterial Gas Embolism typically appear after surfacing from a dive?
• What is the primary consideration for the immediate care of an injured diver at the scene of a diving accident?
• What is the primary purpose of conducting underwater surveys?
• When can a diver deviate from the regulations of the diving manual?
• What can reduce the likelihood of decompression sickness after a long dive?
• What is the importance of monitoring marine biodiversity?
• What should divers do if they experience sudden symptoms after surfacing?
• If you do not feel mentally or physically well to dive upon arriving at a dive site, what should you do?
• What physiological condition should divers monitor to avoid decompression sickness?
• What may be symptoms of decompression sickness?
• What is the significance of dive planning?
• Which factor should be emphasized in a dive briefing?
• According to tissue modeling theory, when a tissue compartment has gained all the nitrogen possible it can gain, it is said to be ______.
• An air (gas) embolism is clinically similar to what non-diving related medical condition?
• You logged 20 dives 10 months ago but have not been in the water since then. Because you haven't been in the water since then, you are not current. What is the truth of this statement?
• Dalton's Law of Partial Pressures helps explain the causes of which of the following?
• What is the significance of dive site selection?
• What is the driving force that causes inert gas to dissolve into the body’s tissues?
• How should dive tables and computers be used to minimize the risk of decompression sickness?
• What are the primary physiological effects of diving on the human body?
• What should a diver do when encountering marine life during a dive?
• Why is scuba training relevant to scientific diving?
• What is the recommended way to test a scuba cylinder for potential leaks before use?
• What equipment is essential to monitor during a dive?
• What does effective buoyancy control enable a diver to do?
• What is one major benefit of using floats while diving?
• At a depth of 99 fsw / 30m, how much of the surface volume will a flexible container be?
• What is the primary safety equipment used in diving emergencies?
• Which of the following is NOT among the Diving Accident Emergency Management Plan procedures?
• What is a thermocline?
• How does age affect dive planning and safety?
• Must dive tables always be present on site when conducting dives using dive tables?
• What distinguishes scientific dive training from recreational diving certification?
• Dive computers:
• Why is it essential to monitor no-decompression limits during a dive?
• Why is it important to have medical clearance for scientific divers?
• What is the primary reason divers practice safety stops during ascent?
• What is the best method for rinsing your regulator?
• What checks are essential to perform on dive equipment before use?
• Which of the following is a safety measure in scientific diving?
• Where does the greatest rate of pressure/volume change occur?
• What condition might cause mental cloudiness during a dive at 115 feet?
• A steel block weighing 500 lbs./226.7kg in air and displacing 2 cubic feet of water will weigh ______ in salt water.
• What are considered ethical considerations in scientific diving?
• Why is the buddy system critical in scientific diving?
• Are dive computers capable of taking into account an individual's metabolism, age, and fitness?
• If your buddy becomes unconscious about two minutes after surfacing, what should be suspected?
• When should a diver begin to equalize the pressure in their ears?
• It is the individual diver's responsibility to inspect their gear:
• If transitioning from ocean to fresh water dives, what should you do with your weight belt to maintain neutral buoyancy?
• In a gas mixture with 30% oxygen, what is the partial pressure of the oxygen at 3 atmospheres absolute?
• A burst disc on a tank valve is activated by which of the following?
• How does maintaining physical fitness benefit divers?
• What are some common data collection methods used in underwater research?
• During a dive, your regulator begins to free-flow. What should you do?
• What should divers do immediately in the event of a dive-related emergency?
• Which piece of equipment is essential for ensuring communication underwater?
• How can contamination be prevented in underwater sample collection?
• In diving, what is primarily indicated by the phrase "the tank is due for a hydrostatic re-test"?
• How can nitrogen narcosis be mitigated?
• What is a critical feature of sand ripples as divers approach the shore?
• What is nitrogen narcosis?
• How do you prevent water from entering the scuba cylinder?
• Why is understanding marine geology significant for divers?
• What is the trend of sand ripples as you approach the shore?
• How can divers maintain awareness of their surroundings?
• If the power inflation mechanism on your BCD sticks or freezes in the fully down position during a dive, what should you do?
• What is a common cause of unconsciousness in diver shortly after surfacing?
• What is an important consideration when using dive tables?
• What is an essential part of the treatment for any decompression illness?
• What is the role of buoyancy in diving?
• In what way can divers contribute to conservation efforts?
• Which of the following could be a sign of decompression sickness?
• Why is carbon monoxide considered a hazardous component in a breathing gas mixture?
• What is the recommended treatment for nitrogen narcosis?
• How does good health affect a diver's performance?
• How should divers approach practicing good dive habits?
• The OSHA scientific exemption requires five components. Which of the following is one of the components?
• What should be done with a full tank showing a visual inspection sticker that is four years old?
• If you become separated from your buddy during the dive, what should you do?
• What equipment is typically used for underwater photography during scientific dives?
• What equipment is necessary during dives requiring entry into confined spaces?
• Why is post-dive debriefing considered important in scientific diving?
• Why is environmental monitoring crucial in scientific dives?
• What is the relationship between water pressure and dive depth?
• What are standard procedures for conducting experiments underwater?
• What is the main purpose of a dive computer?
• When notifying EMS from an offshore vessel, what information should you be prepared to provide?
• What are "no-decompression limits"?
• What should you do if caught in a rip current?
• What controls the rate of nitrogen absorption and elimination by the human body during a dive?
• If descending and pain is felt in the ears, what should the diver do?
• What should divers avoid doing when interacting with wildlife?
• How does poor visibility impact scientific diving?
• Decompression sickness is primarily caused by what physiological process?
• Which organization does the Diving Control Board enforce standards from alongside AAUS?
• Scientific diving is defined as diving conducted solely for what purpose?
• What is the purpose of using underwater drones in scientific diving?
• Which function is NOT designed for a BCD?
• At what depth does a partial pressure of 1.6 ATA occur?
• A reverse block is the inability to equalize pressure in which part of the body during ascent?
• What does the term "decompression" refer to in scuba diving?
• What is the first step to take when you are assisting a panicked diver on the surface?
• What is a key risk associated with diving at night?
• Excessive or uncontrolled hyperventilation is dangerous because it can lead to:
• In terms of safety, how should divers use dive computers and tables?
• What action can a diver take to ensure they are prepared for a dive?
• What are the main types of dive tables?
• If air supply is contaminated by 1% carbon monoxide at 66 feet, this is equivalent to what percentage at sea level?
• After surfacing a non-breathing diver, what should you do next?
• Which law states that the solubility of a gas in a liquid varies in proportion to the partial pressure of that gas in the overlying space?
• Which symptom is commonly associated with decompression sickness?
• The single most important thing when providing assistance to a panicked diver on the surface is:
• What should divers do to ensure their tanks are properly maintained?
• At a depth of 80 fsw/24.4m, what is the pN2 of the air Kevin inhales?
• What is the primary danger of diving with carbon monoxide in the gas mixture?
• What is the absolute maximum depth for a diver if they are not accompanied by a Diving Safety Officer?
• What are the two factors that have the greatest effect on gas consumption during a dive?
• Two hours after a dive to 80 feet, a diver is complaining of fatigue and numbness in their lower extremities. What condition are they likely suffering from?
• What physical condition affects the ear during a dive that could lead to vertigo?
• What is required for any dive profile that exceeds no-decompression limits?
• Which condition describes the change in appearance of objects viewed underwater compared to above water?
• How does temperature affect diving?
• What is the maximum recommended ascent rate for divers?
• Which statements apply to conservative diving methodology regarding decompression sickness avoidance?
• As you ascend to the surface, you should look:
• What is the correct action if your dive guide signals for an ascent?
• How long will an air supply that lasts 18 minutes on a 66-foot dive last on a 33-foot dive?
• A current meter weighs 50 lbs submerged. If a lift bag is used to make it neutral, what is the surface volume of air added?
• In the context of diving, what does 'gas toxicity' typically refer to?
• What is saturation diving?
• What is the ambient pressure on a diver at 92ft / 28m of salt water?
• What describes non-invasive sampling techniques in scientific diving?
• What is the significance of having backup equipment for divers?
• Is it a requirement to log your dives using your organization's logging system in order to maintain scientific diver authorization?
• What is the standard practice regarding the use of dive computers?
• Explain how scientific diving contributes to understanding climate change.
• How can water quality be assessed during a dive?
• What condition is arterial gas embolism (AGE) primarily caused by?
• Sound travels about _____ times ________ in water than it does in air.
• What is a potential consequence of excessive ascent rates?
• How often must scuba cylinders in the USA be visually/hydrostatically tested by qualified professionals?
• For which piece of equipment is a quick-release buckle most critical?
• What equipment is essential for a scientific diver?
• A diver has ascended rapidly and shows symptoms such as froth from the mouth and paralysis on their left side. What condition are they likely suffering from?
• Diving safety is primarily overseen by which role in the diving team?
• When uncomfortable with aspects of the dive plan described by the Lead Diver, what is the appropriate action to take?
• The immediate first aid treatment for decompression illness and/or near drowning is:
• Which action is NOT recommended when assisting a non-breathing diver?
• What can be a consequence of not checking equipment prior to a dive?
• What does AAUS stand for?
• What is the risk associated with Enriched Air Nitrox breathing mixes compared to air?
• During an emergency swimming ascent, how should you handle your regulator?
• Most cylinder explosions occur during which circumstance, requiring what to safeguard the person with the high pressure cylinder?
• What method is most appropriate for safe diving in a strong current?
• What should a diver do if they feel uncomfortable or sick while underwater?
• Which aspect of physical fitness is particularly crucial for divers?