Scuba Diving Scuba Diving Equipment 1 — Questions and Answers
Question 1: What does the acronym BCD stand for in scuba diving?
- Buoyancy Control Device (Correct answer)
- Breathing Control Dial
- Bottom Compression Disc
- Ballast Compensation Dial
Correct answer: Buoyancy Control Device
BCD stands for Buoyancy Control Device, the inflatable vest worn by divers to control their buoyancy underwater.
Question 2: What is the primary function of a regulator in scuba diving?
- Reduce tank pressure to breathable levels (Correct answer)
- Measure depth underwater
- Inflate the BCD
- Track remaining air supply
Correct answer: Reduce tank pressure to breathable levels
A regulator reduces the high-pressure air in the tank to ambient pressure so the diver can breathe it safely.
Question 3: Which gauge tells a scuba diver how much air remains in their tank?
- Submersible Pressure Gauge (SPG) (Correct answer)
- Depth gauge
- Compass
- Dive computer
Correct answer: Submersible Pressure Gauge (SPG)
The Submersible Pressure Gauge (SPG) measures the air pressure remaining in the scuba tank.
Question 4: What is the recommended minimum tank pressure at which a diver should begin their ascent?
- 500 PSI (35 bar) (Correct answer)
- 1000 PSI (70 bar)
- 200 PSI (14 bar)
- 750 PSI (52 bar)
Correct answer: 500 PSI (35 bar)
500 PSI (35 bar) is the widely taught minimum reserve pressure that signals a diver should end the dive and ascend.
Question 5: What material are most modern scuba tanks made from?
- Aluminum or steel (Correct answer)
- Titanium or carbon fiber
- Plastic or fiberglass
- Copper or brass
Correct answer: Aluminum or steel
Most scuba tanks are made from aluminum or steel, each offering different buoyancy and weight characteristics.
Question 6: What is the purpose of a wetsuit in scuba diving?
- Thermal insulation and minor physical protection (Correct answer)
- Increasing air supply duration
- Regulating breathing pressure
- Providing navigation reference
Correct answer: Thermal insulation and minor physical protection
A wetsuit traps a thin layer of water against the skin, which the body heats to maintain warmth and also provides minor abrasion protection.
Scuba Diving Scuba Diving Equipment 1
What does the acronym BCD stand for in scuba diving?