The best place for me to position an alternate air source is
loose by my side so I can find it fast.
in the triangle area formed by my chin and the lower corners of my rib cage.
to the base of my cylinder.
to the back of my BCD between my shoulder blades and waist.
In the triangle area formed by my chin and the lower corners of my rib cage.
Lung overexpansion injuries can be caused by
scuba diving without a buddy.
continuing a dive when not properly weighted.
not drinking enough water before scuba diving.
holding my breath while scuba diving.
Holding my breath while scuba diving.
If my cylinder of air lasts 60 minutes while I am at the surface breathing normally, assuming all else is the same, how long will it last at 20 metres/66 feet breathing normally?
60 minutes
20 minutes
15 minutes
12 minutes
12 minutes.
The difference between DIN valves and yoke valves is that DIN valves
are made from durable plastic.
contain a spring-operated shutoff valve that is held open by cylinder pressure.
have an o-ring in them.
have threaded openings to screw the regulator into.
Have threaded openings to screw the regulator into.
Which of the following is part of proper care for my scuba cylinder?
Sand and repaint it every year.
Dry it in the sun.
Keep some air in it.
Have it pressure tested every month.
Keep some air in it.
The best place to position an alternate air source, such as an alternate regulator or an extra breathing device, depends on several factors and personal preferences. However, in scuba diving, the most commonly recommended position for an alternate air source is in the triangle area formed by your chin and the lower corners of your rib cage. This is commonly known as the "octopus" position.
The reason for placing the alternate air source in this position is to ensure it is easily accessible in case of an emergency, while also minimizing the risk of entanglement or obstruction during the dive. Placing it loose by your side may increase the chances of it getting caught on something or being difficult to find quickly in an emergency situation.
Additionally, positioning the alternate air source to the base of your cylinder might not be ideal as it can obstruct your movements and interfere with your buoyancy control. Placing it at the back of your BCD between your shoulder blades and waist could also make it harder to locate and reach during an emergency, especially if you are in an inverted position or tangled in any equipment.
It is important to note that the above suggestions are general guidelines, and it's always recommended to consult with a diving professional or instructor who can help you determine the best placement for your specific configuration and comfort.