60 Questions
What material are many gas cylinders made of due to its lighter weight?
Aluminum
Which type of gas cylinder is made of steel alloy with higher strength?
DOT Type 3AA
What is the primary material used in the construction of gas cylinders for its strength?
Seamless steel
What type of relief valve ruptures at a specific pressure to vent gas out in a controlled manner?
Frangible/Ruptured Disk
At what approximate temperature does a fusible plug relief valve melt to allow gas to vent out in case of fire?
90-100 ºC
Where is a spring-loaded relief valve typically found in relation to gas cylinders?
Not directly attached to a cylinder
What could happen if the gas temperature in a cylinder increases too much?
The high gas pressure could rupture and explode the cylinder
Why do most small cylinders have a fusible plug relief valve?
To allow gas to vent out in case of fire
Which safety system is specifically designed for low pressure connection?
Diameter Index Safety System (DISS)
Which safety system is part of ASSS but only applies to the valve outlet of small cylinders?
Pin Index Safety System (PISS)
Which safety system can withstand higher pressure, more than 200 psig?
American Standard Safety System (ASSS)
Which safety system is a specific type of Quick Connect system?
Diameter Index Safety System (DISS)
Which safety system has two pins projecting from the inner surface of the yoke connector that mate with the two pinholes?
Pin Index Safety System (PISS)
What does a + sign marking on a cylinder indicate?
It is approved for filling to 10% greater than its service pressure
What is the relationship between the E, H, and T size cylinders in terms of gas capacity?
E < H < T
Why should cylinder color coding only be used as a guide for identifying contents?
Color codes are not standardized internationally
What pressure are cylinders with a service pressure of 2015 psi filled to?
2200 psi
What does a + sign marking on a cylinder indicate?
It is approved for filling to 10% greater than its service pressure
Why should cylinder color coding only be used as a guide for identifying contents?
Color codes are not standardized internationally
At what pressure are cylinders with a service pressure of 2015 psi filled to?
2200 psi
What is the relationship between the E, H, and T size cylinders in terms of gas capacity?
E < H < T
What color is a gas cylinder containing Nitrogen?
Black
What color would a gas cylinder containing Carbon dioxide and Oxygen be?
Gray/White
What gas is represented by the color Brown in the gas cylinder coding system?
Helium
What is the recommended temperature range for placing gas cylinders to prevent from heat?
Below 52 degrees C
What is the recommended action to avoid damage to gas cylinders during transportation?
Use cylinder carts with a securing mechanism
What is the primary purpose of keeping protective cylinder caps in place when the cylinder is not in use?
To protect the valve and prevent contamination
Why is it important to avoid storing air compressors and gas cylinders together?
To prevent contamination of the gas
In the context of cylinder safety, the guidelines for visually inspecting the cylinder and valve before use are recommended by which organization?
NATIONAL FIRE PROTECTION AGENCY (NFPA)
Which organization is responsible for providing recommendations for cylinder safety?
AMERICAN PETROLEUM INSTITUTE (API)
The guidelines for cylinder safety, including visual inspection, are based on the recommendations of which association?
CANADIAN STANDARDS ASSOCIATION (CSA)
What is the relationship between the volume of gas in a liquid gas cylinder and its pressure, as per the provided information?
The pressure has no relationship to the amount of liquid remaining
What is the most accurate method for determining the contents of a liquid gas cylinder, according to the provided information?
Weighing the cylinder
What happens to the pressure in a gas cylinder when all the liquid is gone and the cylinder contains only gas, based on the given information?
The pressure decreases in proportion to a reduction in volume
What is the relationship between the volume of gas and pressure in a gas cylinder, as per the provided information?
The volume of gas is directly proportional to its pressure at a constant temperature
What is the most accurate method for determining the contents of a liquid gas cylinder, based on the provided information?
Weighing the cylinder
What happens to the pressure in a gas cylinder when all the liquid is gone and the cylinder contains only gas, based on the given information?
The pressure decreases in proportion to a reduction in volume
What is the relationship between the volume of gas and pressure in a gas cylinder, as per the provided information?
The volume of gas is directly proportional to the pressure
What gas is represented by the color Brown in the gas cylinder coding system?
Nitrous oxide (N2O)
What is the recommended action to avoid damage to gas cylinders during transportation?
Avoid sudden movements or impacts
How is Helium commercially produced for medical use?
By liquefying natural gas and mixing it with 20% oxygen
How is Nitrous Oxide (N2O) commercially produced?
By thermal decomposition of ammonium nitrate
What is the primary method for producing Carbon Dioxide (CO2) for medical use?
By heating limestone in contact with water
How are small quantities of Oxygen (O2) commercially produced?
By electrolysis of water & decomposition of sodium chlorate (NaClO3)
What is the primary method for producing Nitric Oxide (NO) commercially?
By oxidizing ammonia at high temperatures in the presence of a catalyst
Which gas, when breathed in pure form, would cause suffocation and death?
Helium (He)
Which gas is used in the management of singultus (hiccups) and the prevention of washout of CO2 during cardiopulmonary bypass?
Carbon Dioxide (CO2)
Which gas is a pulmonary vasodilator to improve oxygenation?
Nitric Oxide (NO)
Which gas decreases the work of breathing by making gas flow more laminar?
Helium (He)
Which gas is used to provide anesthesia during surgery and is commonly known as 'laughing gas'?
Nitrous Oxide (N2O)
What is the most common form of storage for bulk (central) oxygen?
Liquid storage
What is the primary advantage of bulk (central) oxygen supply?
Lower cost over long term
What is the purpose of a centrally regulated delivery pressure in bulk (central) oxygen supply?
To eliminate the need for separate pressure-reducing valves at each outlet
What is the primary advantage of operating bulk (central) oxygen supply at low pressures?
Increased safety compared to high-pressure cylinders
What are the two forms in which bulk O2 can be stored?
Gaseous and liquid
What is the critical temperature for liquid oxygen?
-118.6 degrees C
How is liquid oxygen stored to maintain its liquid form?
In large stand tanks at low pressure separated by an insulated vacuum
What is the standard working pressure for gaseous oxygen after it flows through vaporizer coils?
50-55 psi
What is the purpose of the safety vent in the liquid oxygen system?
To allow vaporized liquid O2 to escape if warming causes cylinder pressure to increase above a set limit
What happens to the liquid oxygen when it is exposed to ambient temperature?
It quickly converts back into a gas
Test your knowledge of gas cylinder construction with this quiz. Learn about the materials used, such as seamless steel and aluminum, and the different types, including DOT Type 3A and 3AA.
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