Scientific Diver Certification Exam Practice Test

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