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Divemaster 120 Final Exam A
You are assisting an instructor in open water with a class of four OpenWater Diver students. The instructor conducts an ascent skill with one student. Your likely function is to: a. make the ascent with the instructor for added control. b. stay with and supervise the remaining student divers. c. wait one minute then ascend with the remaining student divers. d. take the remaining student divers on a short tour. -with and supervise the remaining student divers. โ โ b. stay You need to apply your judgment to which elements of diversupervision?
a. Evaluating whether dive conditions are acceptable. b. Choosing which dive techniques to recommend. c. Picking a vantage point for supervising dive activities.
d. All of the above. - โ โ d. All of the above. Your primary role in an instructional setting is to: a. focus on teaching. b. prepare for emergencies. c. gain experience with teaching skills. d. assist the instructor including handling logistics and helping withstudent diver supervision. - โ โ d. assist the instructor including logistics and helping with student diver supervision. Your role in dive planning for a group of certified divers is to: a. relieve everyone in the group of all responsibility for dive planning. b. assess the equipment needs for each individual in the group. c. provide broad planning information that divers use to plan theirindividual dives.
A diver suffering from hypothermia may have which of these signs andsymptoms?
a. Uncontrollable shivering b. Slowed mental processes c. Appear drowsy, uncoordinated and forgetful
d. All of the above. - โ โ d. All of the above. A diver who takes a really long time to prepare personal equipment for adive might be:
a. exited about the dive. b. busy taking care of equipment for a buddy or other divers. c. stressed or have concerns about the dive.
d. tired or too hot. - โ โ c. stressed or have concerns about the dive.
A regulator malfunctions and starts to free flow. This is due to it's_____________ design.
a. fail safe (down stream) b. demand valve c. balanced piston
d. open circuit - โ โ a fail safe (down stream) A regulator's first stage reduces ________________ pressure from thecylinder to intermediate pressure and the second stage delvers air to the diver at _____________ ambient pressure. a. high / ambient b. air / ambient c. ambient / high
d. air / low - โ โ a. high / ambient
Approximately how much denser is the air you breathe at depth of 30metres/ 99 feet as compared to the surface?
a. It is equal to the surface density. b. Two times as dense. c. Three times as dense.
d. Four times a dense - โ โ d. Four times a dense Arteries carry blood _____________ the heart and veins carry blood___________ the heart.
a. toward / away from b. hemoglobin to / plasma through c. away from / toward
d. red in color to / blue in color form - โ โ c. away from / toward
Because certain factors may increase the risk of decompression sickness,divers should avoid:
a. driving soon after an illness or injury. b. strenuous exercise right after a dive. c. dehydration.
d. All of the above. - โ โ d. All of the above. Blowing long and forcefully against a pinched nose while havingequalizing your ears may result in a(n) ___________.
a. sinus squeeze b. eustachian tube rupture. c. round window rupture
d. oval window rupture. - โ โ c. round window rupture.
d. review the appropriate PADI Specialty. -PADI Discover Local Diving program. โ โ b. participate in a Choosing a vantage point may be a compromise between the best placeto ____________ and the best place to ______________.
a. enter the water / assess the environment. b. lend assistance / enter the water. c. watch divers / enter the water. d. watch divers / lend assistance -assistance โ โ d. watch divers / lend Divers expect that, as a dive professional, you're knowledgeable aboutdiving, and they will look to you for advice regarding:
a. dive education and equipment. b. local diving opportunities and dive travel. c. caring for the local dive environment as well as the aquatic realm ingeneral.
d. All of the above. - โ โ d. All of the above. Flying after diving recommendations suggest that divers wait__________ hours after completing a single dive and _________ hours after completing multiple dives for several days before flying in acommercial jet airliner.
a. 12 / 24 b. 4 / an extended period beyond 12 c. 12 / 18 d. 24 / an extended period beyond 24 - โ โ c. 12 / 18 For a night dive, each diver should have at least one dive light, with abackup light recommended. - โ โ True. For this multilevel dive, what is the maximum allowable time for thethird level of the dive?
Level 1 - 115 ft for 8 minutes Level 2 - 55 ft for 12 minutes Level 3 - 40 ft for _____________ a. 25 b. 47
d. waves / tides - โ โ a. tides / waves. How do you identify the hydrostatic test date on a scuba cylinder? a. Decal with the day, month and year. b. Green and yellow cylinder band with the test date printed on it. c. Month and year stamped on the cylinder neck.
d. Day month and year stamped on the cylinder base. -and year stamped on the cylinder neck. โ โ c. Month How would you most efficiently provide oxygen to a breathing, injureddiver?
a. With a non-resuscitator demand valve system. b. Use a continuous flow with non-rebreather mask system. c. With a positive pressure resuscitator system.
d. Through a pocket mask with free flow oxygen system. -With a non-resuscitator demand valve system. โ โ a. If a balloon is filled to 1 litre at 40 metres/ 132 feet and then released,assuming it does not explode, what will its volume be upon reaching the surface? a. 5 liters b. 4 liters c. 2 liters
d. 1 litre - โ โ a. 5 liters If a diver begins to feel light-headed because of a neck seal, the causemay be?
a. Carotid sinus reflex b. Blocked jugular venous return c. Shallow water blackout
d. oxygen toxicity - โ โ a. carbon monoxide poisoning If a diver exits the water in pressure group R, what would the diver'snew pressure group be after a 45 minute surface interval?
a. H b. J c. I d. G - โ โ b. J If a glass of water is placed in a recompression chamber and the pressuresurrounding the water is increased:
a. the amount of gas dissolved in the water will remain unchanged. b. gas will come out of solution, most likely in the form of bubbles. c. the amount of dissolved in the water will increase.
d. the volume of air in the glass will decrease. - โ โ ASK BROOKE If an air mixture contains 80% nitrogen and 20% oxygen at seal level,what will the partial pressure of nitrogen be if its taken to 20 metres / 66 feet in sea water? - โ โ ASK BROOKE
If an object is neutrally buoyant in fresh water, what will happen to theobject when it's placed in salt water?
a. The answer cannot be determined be determined from the informationgiven.
b. It will sink. c. It will float
d. It will remain neutrally buoyant. - โ โ c. It will float. If supervising a drift dive, it's a good idea to have each diver carry: a. a surface signal device b. a dive light. c. an adjustable depth gauge.
d. a slate and pencil - โ โ a. a surface signal device
In the event of a dive accident when supervising certified divers, usuallyyour expected role is to:
a. assist the boat captain in managing the accident. b. manage the accident if you are the most qualified person present c. delegate management to a rescue diver so you can focus on the safetyof uninvolved divers.
d. None of the above. -most qualified person present โ โ b. manage the accident if you are the In the previous question, how many times did "Safety Stop 3 min - SeeRule 2" appear on your eRDPml?
a. 0 b. 1 c. 2 d. 3 - โ โ ASK BROOK b.1? Sound travels approximately ____________ times faster in water than inair, which is why diver have difficulty determining the ___________ of sound underwater.
a. 20 / direction b. four / direction c. two / volume
d. four / volume - โ โ b. four / direction The absolute pressure at 20 metres / 66 feet of salt water is: a. 3 bar / ata b. 2 bar / ata c. 4 bar / ata d. 1.5 bar / ata - โ โ a. 3 bar / ata The first open water scuba dive in the Discover Scuba Diving program: a. may be conducted by a certified assistant at a ratio of 2:
