A regulator _________ is the part that connects to your scuba cylinder and a regulator _________ is the part you place in your mouth and use to breath.
alternate air source / first stage
second stage/first stage
first stage/second stage
low pressure inflator/second stage
first stage/second stage
When I look at things underwater they often seem _________ than they look on the surface.
larger and/or nearer
larger and/or further away
smaller and/or further away
smaller and/or nearer
smaller and/or further away
If I work too hard and find it difficult to breathe underwater, I should
inflate my BCD.
stop all activity and rest, holding on to something for support if possible.
swim immediately to my buddy and signal for help.
do a controlled emergency swimming ascent (CESA – swimming up to the surface saying the ah-h-h-h sound).
stop all activity and rest, holding on to something for support if possible.
I know I am properly weighted for diving if I
float at neck level with my BCD about half full while I am holding a normal breath of air.
sink slowly holding a normal breath of air and with an empty BCD.
float at eye level while holding a normal breath of air and with an empty BCD.
sink easily with a partially filled BCD.
sink slowly holding a normal breath of air and with an empty BCD.
When diving at an altitude above 300 metres/1000 feet
I do not need to follow special procedures.
I can’t use my dive computer.
I do not need to follow special procedures, but my computer may need to be set for the altitude.
I need to follow special procedures and may need to set my computer for the altitude.
I need to follow special procedures and may need to set my computer for the altitude.
A regulator consists of two main parts: the first stage and the second stage.
The first stage is the part that connects to the scuba cylinder. It is responsible for reducing the high-pressure air from the cylinder to an intermediate pressure and delivering it to the second stage. The first stage has multiple hoses, one of which is typically connected to the second stage.
The second stage is the part that you place in your mouth and use to breathe. It is also known as the mouthpiece or demand valve. The second stage receives the intermediate pressure air from the first stage and delivers it to you when you inhale. It also contains features like an exhaust valve to release the exhaled air and a purge button to clear water from the regulator.
So, to answer your question, an "alternate air source" is a term used for an additional second stage that is connected to a separate first stage. It is used for sharing air with another diver in an emergency situation. The correct answer is: The part that connects to your scuba cylinder is called the first stage, and the part you place in your mouth and use to breathe is called the second stage.