SSI Decompression Diving Practice Test

These questions are part of the practice quiz. Start practicing

• What is the average ascent depth for Dive Profile A?
• What does the "Run" column indicate in a dive profile?
• What scuba equipment can SSI Decompression Diving students use?
• Which of the following is a sign that a diver should slow their ascent?
• What is a common routing option for the decompression regulator during a dive?
• What is the surface air consumption rate if a diver uses 1080 psi from an 80 cuft cylinder to dive to 116ft for 12 minutes?
• Why is the safety drill conducted at the start of every dive?
• A slower ascent rate primarily causes:
• What does hypothermia refer to?
• How can divers minimize their risk of decompression sickness?
• What gas mixture is recommended for a dive to 125 feet with oxygen partial pressure limit of 1.40?
• Which of the following are symptoms of decompression illness?
• What aspect of diving does the maximum operating depth relate to?
• What does the term "decompression stop" refer to?
• What could potentially happen if a diver exceeds the recommended oxygen partial pressure limits?
• What is the primary reason for monitoring decompression times?
• An arterial gas embolism is described as:
• What is a consequence of ascending too quickly?
• What should divers do if they experience a malfunction with their gas delivery system?
• The primary purpose of a decompression gas is to achieve what?
• Before initiating a dive, what should divers ensure regarding their equipment?
• What should divers do if they experience symptoms of decompression sickness after a dive?
• Which statement describes open-ended delayed surface marker buoys?
• What type of clip is considered the most suitable for attaching stage cylinders?
• What factor can increase the effects of nitrogen narcosis?
• What minimum components must a decompression regulator have?
• Decompression divers must understand how inert gas is what?
• A diver's gas consumption is influenced by:
• When was the first practical dive computer produced?
• Which device is commonly used for ensuring safe decompression?
• What is an important aspect of planning a decompression dive?
• What does a downward pointing triangle above an upward pointing triangle indicate on a dive computer?
• What distinguishes a surface marker buoy (SMB) from a delayed surface marker buoy (DSMB)?
• What is a benefit of the backplate and wing system?
• What is considered to be the cause of narcosis?
• What does the high gradient factor (GF High) indicate?
• During the ascent, which practice helps to equalize ear pressure?
• What should a diver do if the dive computer fails during a dive?
• A burning sensation while breathing may indicate which condition?
• How can divers increase comfort and control in cold water?
• How can a diver effectively manage the risks of CNS oxygen toxicity?
• What is the primary risk associated with exceeding the partial pressure of oxygen limits?
• What should be done immediately if a diver exhibits signs of an arterial gas embolism?
• Gases with a fraction of oxygen greater than 0.21 are referred to as?
• What safety measure should divers take regarding oxygen levels during deep dives?
• Which factor is crucial in selecting the optimal gas mix for a dive?
• What is the partial pressure of nitrogen in air at 99 feet of salt water?
• What role does experience play in the selection of a buddy for diving?
• At what depth is the limiting partial pressure of oxygen set to 1.40?
• In challenging conditions, at what depth does nitrogen narcosis generally begin to affect a diver?
• Which of the following is a symptom of hypothermia?
• Which gas is primarily responsible for the risk of decompression sickness?
• When planning a dive, a numerical setting of +5 for the level of conservatism indicates:
• What is the maximum minutes of decompression allowed in the Decompression Diving program?
• Where is the stage cylinder typically carried during a dive?
• When does decompression sickness typically occur?
• SSI recommends that a decompression diver should not exceed what CNS "clock" value?
• What action is essential during a diver's ascent to prevent decompression sickness?
• Breathing gases with higher oxygen concentrations results in what effect for divers?
• What is a common symptom of decompression sickness?
• What factor affects the selected level of conservatism during the dive planning process?
• What feature of a dive computer requires wireless communication with the first stage of a regulator?
• What type of information might a decompression diver write on their slate?
• What is a key consideration during the dive planning process?
• Which law states that the amount of nitrogen a diver absorbs is directly proportional to the partial pressure of the gas?
• How can a diver safely extend their time-to-reserve during a dive?
• What is the maximum operating depth of a gas based on the partial pressure of oxygen?
• What is the ascent gas volume for Dive Profile A?
• What does the minimum gas volume requirement depend on?
• What is the recommended minimum size for a decompression cylinder filled to 3000 psi?
• Which physiological factor should divers consider when planning dives at significant depths?
• What does a downward pointing triangle indicate on a dive computer?
• Which of the following factors can increase the risks of decompression illness?
• What was the first dive computer by Dacor capable of determining?
• What must stage cylinders for decompression diving be clearly marked with?
• What is the hand signal for "Gas Switch"?
• What condition occurs when gases separate out of solution and form bubbles in the body?
• Why is a surface interval important in diving?
• What does an upward pointing triangle indicate on a dive computer?
• What is the primary reason for adhering to the CNS "clock" value limits?
• What defines the "best gas mix" for a dive?
• Which statement about surface air consumption rate is true?
• What is the limiting partial pressure of oxygen for the bottom phase of a dive?
• What is the fourth step of the gas switching procedure?
• Buddy teams should be selected based on:
• How is time-to-surface (TTS) calculated?
• If a diver remains at a constant depth long enough, what will their body saturate with?
• Which element is NOT typically used in dive planning?
• How can divers ensure compliance with decompression protocols?
• How does time-to-surface (TTS) contribute to a more efficient decompression dive?
• What does a completed dive profile indicate?
• What is the hand signal for "How Much Gas?"
• How does hypothermia increase the risk of decompression sickness?
• What is the maximum operating depth for EAN 34 with a partial pressure of oxygen limit of 1.40?
• Which of the following features is beneficial for decompression diving?
• How do divers reduce the risk of CNS symptoms during dives with elevated oxygen levels?
• What is the definition of "minimum gas" in diving terminology?
• When planning a dive, what should divers account for in addition to gas volumes?
• What can reduce the risks of decompression sickness?
• What does the "Stop" column in a dive profile indicate?
• Which of the following is NOT a sign of decompression sickness?
• Why are butterfly snaps not recommended for attaching stage cylinders?
• What action should be taken if the decompression gas is inaccessible?
• Which statement about stage cylinder rigging is correct?
• What should divers monitor closely during decompression dives?
• Why does a decompression diver carry a slate or set of wetnotes?
• What is the decompression gas volume for Dive Profile A?
• What does it mean for a tissue to be well-perfused?
• Which of the following best describes the relationship between depth and partial pressure of gases?
• Which of the following is true about the forty percent rule?
• During a dive, which factor is crucial for managing ascent rates?
• What settings are included in dive planning software?
• What is the cylinder capacity of an 580 cylinder filled to 3000 psi?
• An M-Value indicates the maximum amount of what?
• What is the recommended strategy to minimize oxygen toxicity for divers who are exposed to higher partial pressures?
• At approximately what depth does nitrogen narcosis generally begin to affect a diver?
• Which decompression planning step helps reduce risks associated with depth changes?
• What is the primary hazard of switching to another gas?
• Which factor does NOT influence a diver's gas consumption?
• What condition occurs due to excessive heat loss from the body?
• What effect does nitrogen have on divers' bodies during ascent?
• Why is it important to identify the maximum operating depth of the decompression gas?
• What do dive computers primarily determine?
• What happens to nitrogen during a deep dive?
• Why should the decompression gas be richer than the back gas?
• What aspect of dive planning is often calculated using software?
• At which point is the stage cylinder attached to the diver?
• What is the treatment for a diver experiencing hypothermia?
• What type of gas volume is crucial to calculate during a decompression dive?
• What is the second part of the pre-dive procedure?
• Which principle is crucial in managing a safe ascent rate?
• What is a key feature of modern-day dive computers?
• Why is proper gas selection crucial for decompression dives?
• Which aspect is critical during the setup of decompression diving equipment?
• What is a consideration if a diver wants to minimize nitrogen absorption during a dive?
• What is the reason for the low risk of pulmonary oxygen toxicity for divers in this program?
• Common signs and symptoms of CNS oxygen toxicity include?
• Why is it easier to give hand signals with one hand?
• What feature enables a dive computer to calculate more efficient decompression dives?
• What are the signs and symptoms of nitrogen narcosis?
• What types of dive computers are commonly used?
• The air cells of a jacket-style buoyancy compensator make it easier to maintain:
• What is the calculated time-to-surface for a dive to 125 feet, with a 23-minute bottom time and a runtime of 42 minutes?
• What is the purpose of gradient factors in diving?
• What feature must a jacket-style buoyancy compensator have for decompression diving?
• Which dive computer indicator may be visible during decompression dives?
• Who is responsible for analyzing the contents of the stage cylinder?
• Which data must be entered into dive planning software to generate a dive profile?
• What does a gas-integrated dive computer typically measure?
• What is a significant risk associated with high oxygen levels during diving?
• What is the first part of the pre-dive procedure?
• What does a gas-integrated computer provide to divers?
• What attributes should be considered when selecting a dive buddy?
• What is the primary purpose of using a reel or spool in diving?
• What do dive computer algorithms factor in?
• What significantly aided the development of dive computer algorithms?
• What is the main difference between a reel and a spool?
• What should divers avoid prior to diving to minimize risks of decompression illness?
• What is the principal function of a buoyancy compensator in decompression diving?
• A faster descent rate will increase:
• What is included in dive planning software calculations?
• What is the partial pressure of nitrogen in air at 132 feet of salt water?
• What is the third step of the gas switching procedure?
• Why should divers consider their total gas volume prior to a dive?
• Why is central nervous system oxygen toxicity a significant concern for decompression divers?
• What does time-to-surface represent for a diver?
• What does the term "mission" refer to in diving context?
• Which of the following nitrox gases is classified as hyperoxic?
• What is included in the immediate care procedure for decompression illness?
• What action should a diver take when the time-to-surface limit is reached?
• What is the term used for the time required for a tissue to absorb half of the total amount of inert gas?
• What setting is important for personalized dive safety?
• What is the primary use of dive planning software?
• Which dive computer feature is beneficial for decompression diving?
• What is typically the greatest risk associated with ascending too quickly?
• What is the hand signal for "Remaining Decompression Time"?
• What is one reason for properly analyzing a stage cylinder's contents?
• Which term estimates when the minimum cylinder pressure will be reached?
• What is the most common vertical distance between decompression stops?
• In dive planning, what is an essential component to avoid decompression sickness?
• Which cylinder size is most appropriate for a dive requiring 90 cuft of breathing gas?
• A decompression regulator is selected primarily for which of the following reasons?
• Which recommended preventive measure aids in reducing the likelihood of decompression sickness?
• Which condition makes the use of bolt snaps preferable for stage cylinder attachments?
• When selecting the final decompression stop depth, what is the primary consideration?
• A decompression dive profile should plan for what type of failures?
• What factor increases the risk of decompression sickness during a dive?
• What factors affect the size of the stage cylinder needed for a dive?
• Which of the following features is critical for tracking ascent rates in diving?
• Which equipment can help in monitoring a diver's ascent speed?
• What role does a dive buddy play during a dive?
• What is the maximum ascent rate recommended for decompression divers?
• What does the low gradient factor (GF Low) represent?
• What condition results from increased exposures to elevated partial pressure of oxygen levels?
• How does stage cylinder location on the left side affect a diver?
• How does a deeper ascent impact on-gassing in divers?
• How can divers increase the accuracy of their surface air consumption (SAC) rate?
• What is the ascent time for Dive Profile A?