What are the major constituents of air? See Student Workbook Page 10.
At sea level, the Earth's atmosphere exerts a pressure of approximately _______? See Student Workbook Page 10.
When performing calculations for diving operations it is normal to use ______? See Student Workbook Page 11.
What is the total absolute pressure at a depth of 25m? See Student Workbook Page 11.
The greatest pressure/volume change occurs between which depths? See Student Workbook Page 11.
What is the term used for divers’ breathing gases containing more than 21% oxygen? See Student Workbook p10.
Mask squeeze can be prevented by ______? See Student Workbook p12.
The golden rule when ascending is _____? See Student Workbook p18.
A diver uses a ______ to maintain neutral buoyancy throughout the dive. See Student Workbook p17.
Because our eyes are designed to operate in the environment of air, we have to wear a _____ when diving. See Student Workbook p12.
Which of the following is NOT an important reason why the nose is enclosed inside the divers mask? See Student Workbook p12.
If the pressure on a gas increases, its volume will_______________ in direct proportion. See Student Workbook p11.
An inverted bucket full of air at the surface, will be ---------- full of air at 10m. See Student Workbook p11.
The regulator is a two stage pressure reducing valve which reduces the high pressure cylinder air to ______ at which the diver breathes. See Student Workbook p16.
The regulator first stage should be fitted with a high pressure __________ . See Student Workbook p17.
Cylinders used for Nitrox require _______. See Student Workbook p15
WC stamped on a cylinder refers to ______ . See Student Workbook p15.
To guard against air supply problems, you should have ------- ------------. See Student Workbook p16.
After diving you should always --------- your equipment in --------- . See Student Workbook pp13-18.
If a diver gives you a signal you should always ___________ . See Student Workbook p19.