Scuba certification Exam Questions With Complete Solutions

Scuba certification Exam Questions With Complete Solutions .A dependent action to take in response to an out of air emergency is: - ANSWER-Sharing air using the primary second stage and using the alternate air source for yourself .A dive computer keeps track of a diver's nitrogen absorption levels so that the diver can: - ANSWER-Stay within the no-decompression limits on each dive .A high pressure scuba cylinder should be stored: - ANSWER-secured and with a minimum of 500 to 750 psi .A scuba cylinder must be hydrostatically tested: - ANSWER-within fixed intervals set by local laws .A scuba tank for recreational diving should be filled with: - ANSWER-pure, filtered compressed air or nitrox .Absolute pressure is defined as: - ANSWER-*The total pressure exerted on an object .An independent action to take in response to an out of air emergency is: - ANSWER-A Controlled Swimming Ascent or emergency buoyancy ascent .An object immersed in water will be buoyed upward by a force ______ the weight of the water it displaces. - ANSWER-equal to .Assuming a consistent air consumption rate, diving at a pressure of 4 ata will use __ as much air as diving at 2 ata. - ANSWER-2 times. .Coral reefs are formed by: - ANSWER-Coral animals called polyps that form skeletal structures .Dalton's Law can be paraphrased as: - ANSWER-The total pressure of a mixture of gases equals the sum of the partial pressures .Decompression sickness occurs when: - ANSWER-*A diver stays at a depth to long and surfaces to quickly *Excess Nitrogen bubbles out of a solution into the blood and tissue *The nitrogen tolerance tissue gradient is exceeded. .Describing diving with the acronym SCUBA came from what event? - ANSWER-The Demand For the Regulator .Dive computers are essential for planning and executing dives because they: - ANSWER-*Help divers stay within the no-decompression limits *Monitors ascents and descents *record all pertinent information .Divers can help protect the marine environment by: - ANSWER-*Maintaining neutral buoyancy at all times *Keep equipment secured and no dangling *always being a responsible diver .Divers should avoid contact with all corals because: - ANSWER-*Contact can be harmful to the diver *Touching corals will damage your equipment *Contact can damage the coral .During normal diving activities, divers should never exceed an ascent rate of __ feet per minute. - ANSWER-30 .Earplugs: - ANSWER-Should never be worn when diving .Examples of freshwater marine life include: - ANSWER-*Bass *Crawfish *Eel .Gas can enter the bloodstream and cause serious damage to the lungs or even death by: - ANSWER-*Diving with Respiratory congestion *Holding your breath while diving *ascending to fast .Gauge pressure is defined as: - ANSWER-absolute pressure minus 1 ATA .Haldanes theory that the human body can withstand a 2:1 pressure difference was revised by D Workman to a nitrogen ratio of: - ANSWER-1.58:1 .If a diver is injured by harmful sea life, it is usually because of: - ANSWER-*The divers negligence *The divers ignorance *The .If a flexible air-filled container at 100 feet of sea water has a volume of 10 cu ft, what would be the volume if it were transported to the surface? - ANSWER-40 cu ft .If a flexible air-filled container has a volume of 40 cu ft on the surface, what would the volume be at 99 feet in sea water? (rounded off) - ANSWER-10 cu .If you experience pain in your ears during descent: - ANSWER-Stop the decent and ascend until the pain stops