padi IDC theory – SCUBA equipment

Q10
A burst disc is designed to_____ and can be found on
c)    Reduce the possibility that an over-pressurised tank will explode / Tank

Q11
Most modern regulators have a / an ____________ design, which means that the valve opens ____________ the flow of air
a)    Upstream / against
b)   Downstream / against
c)    Downstream / with
d)   Upstream / with