padi IDC theory – SCUBA equipment

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

Q12
A pilot valve is designed to
a)    Fly airplanes
b)   Open a larger main valve
c)    Check that the flow of air is constant
d)   Reduce the air flow
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