SDI

SDI Final Exam | 65 Questions and answers latest update

Objects under water appear 60 percent larger than they do on land. - Answer- true As you descend: - Answer- Colors appear to fade. Reds and oranges are among the first colors to disappear. At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. All of the above. Because sound travels faster under water: - Answer- It is harder to determine the direction from which a sound is coming. Which of the following is/are true? - Answer- Water conducts heat away from you...

Define SCUBA - Answer- S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s - Answer- 1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace - Answer- 1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other training agencies? - Answe...

T/F Our environment stimulates our senses, either directly or indirectly, through a total of four senses (sight, hearing, taste, and smell) that make it possible for us to know about our environment. - Answer- False T/F A common descriptive definition is that time is the continuous, forward flow of events. - Answer- True Science (from the Latin scientia, meaning "knowledge") may be defined as an organized body of knowledge about the natural universe and the processes by which that knowle...

Objects under water appear: 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land. - CORRECT ANSWER Closer and larger than they do on land. As you descend: 1: Colors appear to fade. 2: Reds and oranges are among the first colors to disappear. 3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 4: All of the above. - CORRECT ANSWER ...

SDI EXAM PRACTICE (2024) QUIZZES WITH CORRECT ANS!!

Describe all the steps to assemble a BCD and regulator to a scuba cylinder. - Answer- Spin the tank around so that the back of the valve is facing you. Place the BCD band(s) over the top of the cylinder so that the back of the BCD is facing you. Raise or lower the BCD so the top is even with the cylinder valve. Fasten the buckles. Remove dust cap, hold first stage in left hand, rotate the chambers until the primary second stage sits on the right. Screw the knob on your first stage until it is fi...

SDI Exam Questions and Answers Already Passed Objects under water appear: Closer and larger than they do on land What happens to colors under water As you descend, colors appear to fade, not intensify. Blues and grays are the last remaining colors at depth. Because sound travels faster under water: Sound's increases speed under water makes it harder to determine the direction from which it is coming. Water conducts heat away from your body ___ times faster than air does 25 The presence of t...

Objects under water appear: - Answer-Closer and larger than they do on land What happens to colors under water - Answer-As you descend, colors appear to fade, not intensify. Blues and grays are the last remaining colors at depth. Because sound travels faster under water: - Answer-Sound's increases speed under water makes it harder to determine the direction from which it is coming. Water conducts heat away from your body ___ times faster than air does - Answer-25 The presence of the...

1. Objects under water appear 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land.: Closer and larger than they do on land. 2. As you descend: 1: Colors appear to fade. 2: Reds and oranges are among the first colors to disappear. 3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 4: All of the above.: All of the above. 3. Which of the followin...