Knowledge Review Open Water Dive Chapter 2 PDF

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Summary

1. Check one. “Underwater, objects appear _______________ by 33 percent, making them seem ________________ and/or _______________________ .”
a. minimized, smaller, further away
b. magnified, larger, closer

2. Check one. “Since it travels about four times faster in water than...

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Knowledge Review Chapter 2 1. Check one. “Underwater, objects appear _______________ by 33 percent, making them seem ________________ and/or _______________________ .” a. minimized, smaller, further away b. magnified, larger, closer 2. Check one. “Since it travels about four times faster in water than in air, you will have difficulty determining the origin of ____________ underwater.” a. light b. sound 3. Fill in the blank with the appropriate word: faster or slower. “Water conducts heat away from your body __faster__ than air does.” 4. Describe what you should do if you begin shivering continuously underwater. = When you begin to shiver continuously, get out of the water immediately, dry off and seek warmth. 5. Of the procedures you can follow to compensate for the increased resistance of water while diving, check those listed here: a. Streamline yourself and your equipment. b. Avoid rapid jerky movements. c. Move slowly and steadily. d. Pace yourself. 6. Check the statement that best describes the proper breathing pattern for diving. a. Consistently rapid and shallow. b. Consistently slow and deep. 7. It is easy to prevent overexertion while diving. Check the proper preventative measures listed here. a. Move slowly and avoid extended strenuous activity. b. Use your arms rather than your legs for propulsion underwater. c. Know your physical limits. 8. Explain what to do if you become overexerted while diving. a. Underwater: = stop all activities, breath deeply and rest. Hold on to an object for support if possible and relax until the breathing return to normal. b. At the surface: =establish buoyancy by dropping weights and stop moving. Rest and catch the breath. Signal for help if necessary. When recover, proceed at a slower pace.

9. Check each statement that describes a technique used for airway control: a. b. c. d.

Use your tongue as a splash guard by placing the tip on the roof of your mouth. Inhale slowly. Avoid rapid, jerky movement. Inhale cautiously.

10. Explain why it is important not to wear a tight-fitting hood. = Hood that too tight will compress arteries in the neck (the carotids), which the brain perceives as high blood pressure and responds by signaling the heart to slow. This will cause light-headedness and if you keep the hood on, fainting and unconsciousness may happen. 11. Check the appropriate answer. The most important feature of any weight system is: a. the size and shape of the weights. b. the ease of adjustment. c. a quick-release mechanism. 12. Check one. An alternate air source should be ____________, so it can be quickly and easily identified by a diver needing the device. a. tucked under the weight belt b. conspicuously marked 13. Describe where you should attach an alternate air source to your body. = secure the alternate to the chest in the triangular area betweem your mouth and the lower corners of the rib cage 14. True or False: A diving knife is used as a tool (to measure, pry, dig, cut and pound), but is not intended to be, nor should be, used as a weapon. ______TRUE______ 15. Identify the meaning of the standard hand signal illustrated here.

a. OK? OK b. Distress, help c. Out-of-air

16. Explain how to check for proper weighting. = 1. Enter the water with all the equipment on and estimated weight requirement. 2. Keep the regulator in the mouth, and staying at the surface, deflate the BCD and hold a normal breath. Ready to kick or hold onto something in case got too much weight. 3. Float at eye level. If not, add or subtract weight until it does. You can just hold the weight while figuring out how much weight is needed. 4. For the final check, exhale. Begin to slowly descend if properly weight. 5. If using a full cylinder, now add enough weight to offset the weight of the air used during the dive (usually about 2kg/5 lbs with single cylinder). 17. List and describe the steps of the predive safety check and explain when you should use the check. = 1. You and your buddy signal each other and agree to ascend. 2. Note the time of ascend. (if don’t have a watch for the dive, simulate checking the time by looking at the wrist). 3. Hold the right hand over the head ( to avoid rut into anything) and hold up the BCD hose with exhaust control with the left hand. You will see the air expanding in your BCD during ascend increase the buoyancy. You need to release air as to keep your ascend under control. 4. Look up and around, slowly rotating to make sure the area above is clear. 5. Swim up slowly, at a rate no faster than 18 metres/60 feet per minutes (slower is fine), while breathing normally.

Student Diver Statement: I’ve completed this Knowledge Review to the best of my ability, and any questions I answered incorrectly or incompletely I’ve had explained to me, and I understand what I missed. Name ____NOR AISHANADIA BT PAUZI_____________ Date ___________17 JUNE 2021_____________...