SSI Science Of Diving Questions And Answers

At an altitude of about 16,000 feet, the atmospheric pressure is approximately: 1/18th the atmospheric pressure at sea level Equal to the atmospheric pressure at sea level Twice the atmospheric pressure at sea level One-half the atmospheric pressure at sea level - Answer- One-half the atmospheric pressure at sea level If the volume of a gas is kept constant, what varies directly with temperature? The pressure All answers are correct The mixing The volume - Answer- The pressure Our perception of light changes as it travels from the water, through the glass of the mask, and into the air pocket in front of the eyes. This gives a magnification factor of ____ to the objects we see underwater. None 50% 100% 33% - Answer- 33% Sound travels differently in water than in air. The major difference is that it travels: Approximately 4 times slower Approximately 10 times faster Approximately 2 times faster Approximately 4 times faster - Answer- Approximately 4 times faster The absolute pressure at a depth of 165 feet in salt water is: 5.012 ata 5.000 ata 6.000 ata 5.901 ata - Answer- 6.000 ata The greatest expansion or compression per foot happens in which depth area? 66 to 33 ft 99 to 66 ft First 33 ft 132 to 99 ft - Answer- First 33 ft Objects do not appear the same in the underwater environment as they do on land. Some major factors that influence this difference in appearance are: Refraction and Absorption only Turbidity