Scuba Certification Exam | Questions
and Verified Answers Rated and Graded
A+ | 2024/2025
What causes buoyancy?
- Correct Answer - Buoyancy is an upward force acting on an
object in water. The force is caused by the water displaced by the
object and is equal to weight of displaced water
What are positive buoyancy, negative buoyancy, and neutral
buoyancy?
- Correct Answer - Positive buoyancy: object weighs less than the
water it displaces, it floats
Negative buoyancy: object weighs more than the water it
displaces, it sinks
Neutral buoyancy: object weighs the same as the water it
displaces, it neither floats nor sinks
Why does salt water cause more buoyancy than fresh water?
, - Correct Answer - salt water has dissolved minerals in it, so a
given volume weighs more than fresh water
What two pieces of equipment do I normally use to control
buoyancy - Correct Answer - 1) weight system--holds just enough
lead weight to offset positive buoyancy
2) BCD (Buoyancy Control Device)--use to change buoyancy
during dive (inflating increases volume, deflating decreases
volume)
How do descending and ascending affect buoyancy?
- Correct Answer - When you descend, volume decreases and
reduces buoyancy; when you ascend, volume increases and
buoyancy increases
How does breathing affect my buoyancy?
- Correct Answer - Inhale--chest expands and increases volume;
adds buoyancy
exhale--chest contracts and decreases volume; reduces
buoyancy
Why is it important to master buoyancy control?
- Correct Answer - Because it allows you to:
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