PADI IDC OW-IE Exam Questions
And Correct Answers (Verified
Answers) 2026/2027
Neutrally Buoyant - CORRECT ANSWER -Something underwater that does not float
and does not sink
Positively Buoyant - CORRECT ANSWER -Something that floats in water
Negatively Buoyant - CORRECT ANSWER -Something underwater that sinks
Yoke Valve/Regulator - CORRECT ANSWER -Valve is more like a clamp. O-ring is on
the tank valve and pressed by the regulator on tightening
Din Valve/Regulator - CORRECT ANSWER -Screwed into threaded valve. O-ring is
on the regulator and encased deep inside the valve.
Balanced First Stage - CORRECT ANSWER -Larger orifice to allow air from the tank
in.
It allows for greater air flow.
It makes it more capable of supplying air to accessories.
,It makes it more capable of supplying air to two divers.
Cylinder Pressure - CORRECT ANSWER -Has less influence on the operation of the
valve since it acts all around the valve stem. Falling tank pressure has less effect on
the amount of breathing effort required to open the valve
Piston First Stage - CORRECT ANSWER -External water pressure acts on a piston,
which is the main moving part.
Has fewer moving parts - makes them faster & easier to overhaul.
Easily accommodate designs with swivels.
Have to be entirely disassembled to adjust.
Diaphragm First Stage - CORRECT ANSWER -The pressure acts on a flexible
diaphragm. A push rod on the inside of this diaphragm transmits the diaphragm's
movement to the valve mechanism.
Separates interior parts from water.
Reduces internal corrosion & contaminant buildup.
Can adjust relatively easily with few tools.
, Only offers four low pressure ports.
Merci Jacques - CORRECT ANSWER -Who invented the first stage?
When I dive with a buddy - CORRECT ANSWER -Diving is easier, safer and more fun
Scuba 2nd Stage - CORRECT ANSWER -Designed to provide air to a diver on
demand when they inhale.
Air is sent from 1st stage at an intermediate pressure above ambient. The 2nd
stage reduces this is to ambient pressure.
Downstream Valve - CORRECT ANSWER -Valve opens in the direction of air flow.
Design makes the regulator 'failsafe'. If fails gives a constant flow of air.
Bias Spring - CORRECT ANSWER -Set to intermediate pressure + tiny bit.
Allows very small amount of inhalation effort is then required to pull valve open
against the spring.
Pilot Valve - CORRECT ANSWER -No spring trying to push valve closed.
And Correct Answers (Verified
Answers) 2026/2027
Neutrally Buoyant - CORRECT ANSWER -Something underwater that does not float
and does not sink
Positively Buoyant - CORRECT ANSWER -Something that floats in water
Negatively Buoyant - CORRECT ANSWER -Something underwater that sinks
Yoke Valve/Regulator - CORRECT ANSWER -Valve is more like a clamp. O-ring is on
the tank valve and pressed by the regulator on tightening
Din Valve/Regulator - CORRECT ANSWER -Screwed into threaded valve. O-ring is
on the regulator and encased deep inside the valve.
Balanced First Stage - CORRECT ANSWER -Larger orifice to allow air from the tank
in.
It allows for greater air flow.
It makes it more capable of supplying air to accessories.
,It makes it more capable of supplying air to two divers.
Cylinder Pressure - CORRECT ANSWER -Has less influence on the operation of the
valve since it acts all around the valve stem. Falling tank pressure has less effect on
the amount of breathing effort required to open the valve
Piston First Stage - CORRECT ANSWER -External water pressure acts on a piston,
which is the main moving part.
Has fewer moving parts - makes them faster & easier to overhaul.
Easily accommodate designs with swivels.
Have to be entirely disassembled to adjust.
Diaphragm First Stage - CORRECT ANSWER -The pressure acts on a flexible
diaphragm. A push rod on the inside of this diaphragm transmits the diaphragm's
movement to the valve mechanism.
Separates interior parts from water.
Reduces internal corrosion & contaminant buildup.
Can adjust relatively easily with few tools.
, Only offers four low pressure ports.
Merci Jacques - CORRECT ANSWER -Who invented the first stage?
When I dive with a buddy - CORRECT ANSWER -Diving is easier, safer and more fun
Scuba 2nd Stage - CORRECT ANSWER -Designed to provide air to a diver on
demand when they inhale.
Air is sent from 1st stage at an intermediate pressure above ambient. The 2nd
stage reduces this is to ambient pressure.
Downstream Valve - CORRECT ANSWER -Valve opens in the direction of air flow.
Design makes the regulator 'failsafe'. If fails gives a constant flow of air.
Bias Spring - CORRECT ANSWER -Set to intermediate pressure + tiny bit.
Allows very small amount of inhalation effort is then required to pull valve open
against the spring.
Pilot Valve - CORRECT ANSWER -No spring trying to push valve closed.
