SDI Scuba Exam: Questions & Answers
Which of the following is not true?
A. Entering shallow water causes the base of a wave to slow.
B. Entering shallow water forces wave energy upward, making the wave
crest unstable and causing it to break.
C. If the top of a wave moves faster than the bottom, the wave will tend to
break.
D. Both the first and third answers are true.
(Ans- B. Entering shallow water forces wave energy upward, making the
wave crest unstable and causing it to break.
Which of the following is/are true?
A. Surge is the backwash of water from waves breaking on shore.
B. Surge is the back-and-forth movement of water caused by waves
passing over head.
C. Surge occurs when waves force water between facing rock ledges.
D. None of the above.
(Ans- B. Surge is the back and forth movement of water caused by waves
passing over head.
Which (if any) of the following are true?
A. Aquatic animals present a greater risk to divers than any other factor.
B. Most aquatic animal bites result from an animal's defensive response to
a perceived threat or, on rare occasions, from a case of mistaken identify