padi IDC theory – SCUBA equipment

Q8
A DIN valve is
c)    A valve allowing the first stage to be screwed into the valve

Q9
The difference between “J” and “K” valve is
a)    A “J” valve is a simple on / off valve, while a “K” valve has a reserve
b)   A “J” valve is in the regulator and a “K” valve is in the tank
c)    “J” valves do not use burst disks
d)   A “J” valve is a reserve system, “K” valve is a simple on / off calve