PADI IDC Theory - Equipment
Test yourself with these questions
PADI IDC Theory - Equipment
The Equipment section of PADI Instructor Exam papers has questions about many things.
But basically we can bring them down to two main areas:
PADI IDC Revision - Equipment - Regulators
Test yourself with these questions. If you get stuck, all is explained in the video below from the PADI IDC Theory Preparation Course
The Basics
PADI IDC and IE Exam regulator questions often focus on either the first stage or the second stage
How it works
First Stage
The job of the first stage is to bring the high cylinder pressure down to intermediate pressure, which is the pressure that’s in all of the hoses, apart from the high pressure hose that leads to your submersible pressure gauge.
Second Stage
This the part that you breathe from. It’s job is to bring the intermediate pressure down to ambient pressure.
PADI IDC Exam Questions - Regulators
When diving with a closed-circuit rebreather (CCR), you primarily use ______ to fine tune your buoyancy
BCD infation/deflation
An uncontrollable regulator freeflow could be caused by______
Extremely cold water
When diving in extremely cold temperatures, such as when ice diving, a key feature of your regulator should be______
an environmental seal.
Which part of a standard regulator reduces high pressure to intermediate pressure?
First Stage
Scuba regulators are referred to as open-circuit_____ because they are activated by _______ and exhaust is vented into the water.
demand valves / diver inhalation
A DIN connection on a scuba cylinder allows the DIN regulator to be screwed directly into the cylinder valve, which has these advantages:
Better seal between the cylinder and regulator and a stronger connection
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PADI IDC Revision - Equipment - Cylinders
The Basics
Cylinders are different sizes and made of different materials. Steel or Aluminium. They need to be regularly tested according to local law.
This might help
Steel cylinders
These cylinders require you to wear less weight that aluminium ones because they displace less water and feel “heavier” in the water.
Steel cylinders that bear a + sign from the last test can be overfilled by 10 per. cent.
Aluminium cylinders
Of course aluminium cylinders require you to wear more weight when you’re diving than you would with a steel cylinder.
Routine Tests
Local law requires cylinders to have a visual test and a hydrostatic test. Visual testing involves a technician removing the first stage and checking the walls for signs of damage. Hydrostatic testing involves immersing the cylinder and pressurising it with water. Providing measurements are within standards, the cylinder is then stamped and can be used for another period of time.
PADI IDC Exam Questions
Three reasons you should have visual inspection performed on a scuba cylinder are to:
1. Detect exterior damage
2. Detect severe interior corrosion
3.Prevent galvanic action between dissimilar metals
A hydrostatic test involves_____ testing a cylinder. The important part of the testing procedure is ______
pressure / placing the cylinder in water
Which part of a cylinder relieves overpressure from an overheated or overfilled cylinder?
Burst disk
A burst disk in the cylinder valve is designed to rupture when the cylinder pressure rises above ____ percent of the cylinders rated pressure. The disk should be replaced______
140 / regularly
A (+) sign after the date of the last hydrostatic test date on a(n)_____ cylinder means the cylinder can be filled to ____ above the listed pressure
Steel / 10 percent
Which of these marking indicates an aluminium cylinder?
3AL
3000
ALUM
DPT-AL
3AL
PADI IDC Revision - Equipment
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Questions on other subjects
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Much more on Equipment
Of course, PADI IDC Exams have questions about so many more subjects than Regulators or Cylinders
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