BSAC revision - OT1 Adapting to the
underwater world
What causes atmospheric pressure at sea level? - Answer-The weight of (mass) of air which makes up
the atmosphere
What is the atmospheric pressure in a) Bar and b) Kg/cm2? - Answer-a) 1 bar
b) 1kg/cm2
What is the absolute pressure in bar at 40m? - Answer-5 bar
What happens to the volume of gas in an inverted bucket when taken from the surface to 10m? -
Answer-Its volume is halved
What glass should be used in the construction of a face mask? - Answer-Tenpered glass
What maintenance is required immediately after using diving equipment? - Answer-It should be washed
in fresh water
Air pressure within the body must be kept equal to what, if injury is to be avoided? - Answer-Ambient
(surrounding) water pressure
What are the three main items of SCUBA equipment? - Answer-Cylinder, regulator and buoyancy
compensator
underwater world
What causes atmospheric pressure at sea level? - Answer-The weight of (mass) of air which makes up
the atmosphere
What is the atmospheric pressure in a) Bar and b) Kg/cm2? - Answer-a) 1 bar
b) 1kg/cm2
What is the absolute pressure in bar at 40m? - Answer-5 bar
What happens to the volume of gas in an inverted bucket when taken from the surface to 10m? -
Answer-Its volume is halved
What glass should be used in the construction of a face mask? - Answer-Tenpered glass
What maintenance is required immediately after using diving equipment? - Answer-It should be washed
in fresh water
Air pressure within the body must be kept equal to what, if injury is to be avoided? - Answer-Ambient
(surrounding) water pressure
What are the three main items of SCUBA equipment? - Answer-Cylinder, regulator and buoyancy
compensator
