Chapter 2 Flashcards
A mask must
Fit well, afford good vision, and cover your nose to help equalize pressure in your ears
Two factors that can affect the breathing ease of a snorkel
Height and diameter
What fins can you dive in any temperature water with
Heel-strap
If you use fins that are too large and stiff, it may cause
Leg cramps
In the US, Scuba cylinders must be internally inspected
Once per year
In the US, Scbua cylinders must be pressure tested
every 5 years
What must you prevent from entering your scuba cylinder?
Water
What way do you rotate a cylinder valve knob to turn it on?
Counterclockwise
Scuba cylinders are equipped with this to keep overpressure from rupturing the cylinder
Over pressure relief/burst disk
If you plan to dive in deep, wreck, or ice diving you want a
High-performance regulator
The first stage of the regulator must have a high-pressure port so what can be connected to the regular first stage?
Submersible pressure guage
When you rinse your regulator you need to be careful to not press this on the second stage
Purge button
Contingency Scuba provides:
A totally independent regulator and air supply
What can you read accurately down to about 12 meters/40 feet?
A capillary tube depth guage
What is an important directional reference instrument?
A compass
What provides a convenient way to consolidate your diving instruments?
A dive console
A timing devise for diving must be able to measure
Depth underwater and time underwater
Dive computers usually display maximum and current what? And remaining allowed what?
Depth and dive time
The three general types of BCs are
Back flotation, jacket, and horse collar
All BCs must be equipped with
An overpressure relief valve and an inflator/deflator hose
You should rinse your BC
Internally and externally after use
The most important feature of a weight belt is
Quick release
A desirable feature of a weight belt is teh ability to
Compensate for the compression of your diving suit as you descend
Two reasons some divers prefer soft weights over solid weights are
More comfortable and less damage if dropped
Diving suits protect against
Heat loss, cuts, scrapes, and stings
What is only sufficient for warm tropical diving?
Skin suits
A neoprene wetsuit must
Fit precisely and snuggly
You lose the greatest amount of body heat through
Head, hands, chest, armpits, and groin
Clipping instruments to your BC prevents damage to
Themselves and the underwater environment
A working tool every diver should have
Dive knife
