SDI OPEN WATER SCUBA DIVER EXAMINATION TEST 2026 QUESTIONS WITH 100% CORRECT ANSWERS GRADED A+

SDI OPEN WATER SCUBA DIVER
EXAMINATION TEST 2026 QUESTIONS
WITH 100% CORRECT ANSWERS GRADED
A+

⩥ Density. Answer: How heavy something is for its size.


⩥ Light absorption. Answer: Light gets dimmer the deeper you go.


⩥ Refraction. Answer: Water bends light and makes things look closer
and bigger.


⩥ Color loss. Answer: Colors fade with depth, starting with red and
orange.


⩥ Sound underwater. Answer: Sound travels faster and is hard to locate.


⩥ Heat loss. Answer: Water pulls heat from your body quickly.


⩥ Pressure. Answer: Increases as you go deeper underwater.

, ⩥ Barotrauma. Answer: Injury caused by trapped air expanding or
shrinking.


⩥ Equalization. Answer: Balancing pressure in your ears and mask.


⩥ Mask squeeze. Answer: Mask presses on your face if not equalized.


⩥ Ear squeeze. Answer: Pain from pressure if ears are not equalized.


⩥ Reverse block. Answer: Trapped air expands during ascent and causes
pain.


⩥ Sinus squeeze. Answer: Pressure pain in your forehead or face when
descending.


⩥ Tooth squeeze. Answer: Pain in teeth from trapped air while diving.


⩥ Boyle's Law. Answer: As pressure goes up, air volume goes down.


⩥ Charles' Law. Answer: Air expands when it gets warmer.


⩥ Dalton's Law. Answer: More pressure means more gas goes into your
body.