Medical Gases RC122 WK 1 Exam
Questions with correct Answers
2026/2027 A+ Graded 100% Verified
Laboratory gases - ANS -are used for equipment calibration and diagnostic testing
Therapeutic gases - ANS -are used to relieve symptoms and improve patient's
oxygenation
Anesthetic gases - ANS -are combined with oxygen to provide anesthesia during surgery
As an RT you should be aware of... - ANS --remain familiar with all aspects of gases used
in the clinical setting
-Fire Risk
-Medical compressed gases are classified as either non-flammable, oxidizing
(non-flammable but supportive of combustion) and flammable
Physical Characteristic of Medical Gases(Lab Gas) - ANS -
Physical Characteristic of Medical Gases(Therapeutic Gas) - ANS -
Storage and Handling of Oxygen (Medical Gas) - ANS --Stored in portable, high-pressure
cylinders or in large bulk reservoirs
-Bulk reservoirs require a separate distribution system to deliver the gas to the patient
Storage and Handling of Oxygen(Gas Cylinders) - ANS --Used to store and ship
compressed or liquid medical gases and are high-pressure cylinders
-Gas cylinders are made of seamless steel and are classified by the Federal Department
of Transportation (DOT), according to their fabrication method
Types of gas cylinders - ANS --Type 3A - made of carbon steel
-Type 3AA - made of steel alloy tempered for higher strength
Storage and Handling of Oxygen (Identification) - ANS --Marked with metal stamping on
the shoulders that supplies specific information
-(1st line) Letters DOT or ICC (Interstate Commerce Commission) are followed by the
cylinder classification (3A or 3AA) and the normal filling pressure in pound per square
inch (psi)
, -(2nd line) The letter size of the cylinder followed by the cylinder serial number
-(3rd line) Provides a mark of ownership, followed by the manufacturer's stamp or mark.
Storage and Handling of Oxygen (Identification) - ANS --On the other side of the cylinder
is information about the original safety test and dates of all subsequent tests
-Safety tests are conducted every 5-10 years, as specified in DOT regulations
-During these tests, cylinders are pressurized to 5/3 or 167% of their service pressure
-While the cylinder is under pressure, technicians measure cylinder leakage, expansion
and wall stress
Storage and Handling of Oxygen (Identification) - ANS --The notation EE followed by a
number indicates the elastic expansion of the cylinder in cubic cm
-A * next to the test date indicates DOT approval for 10 years
-A + sign means the cylinder is approved for filling 10% above its service pressure
-After hydrostatic testing, cylinders are subjected to internal inspection
Medical Gases(Filling (charging) cylinders) - ANS --the gas into its smaller volume
-In Pressure in a cylinder depends on the state of its contents
-In a gas filled cylinder, the pressure represents the force to compress liquid-filled
cylinder is the vapor pressure needed to keep the gas liquefied at the current temp
Safety Systems - ANS --Gas cylinders may contain a variety of gases
-(ASSS) American Standard Safety System
-Designed to prevent the interchange of cylinders containing different gases
-Different thread sizes and pitches are used to prevent interchange between large
cylinders (H)
Medical Gases(Safety Indexed Connector Systems) - ANS --American Standard Safety
System - (ASSS)
-Provides standards for threaded high-pressure connections between large compressed
gas cylinders (sizes F through H/K) and their attachments
Safety Systems - ANS --(PISS) Pin Index Safety System
-Small cylinder (E) valves use a yoke connection rather than a threaded connection for
equipment attachment (Flow meter)
-The face of the cylinder valve has two holes drilled in two of six specific positions
-The position of the drilled holes is unique for different gases
Medical Gases (Safety Indexed Connector Systems) - ANS --Pin Indexed Safety System -
(PISS)
-Pin indexing is part of the ASSS, but applies only to the valve outlets of small cylinders
up to and including E cylinders
Questions with correct Answers
2026/2027 A+ Graded 100% Verified
Laboratory gases - ANS -are used for equipment calibration and diagnostic testing
Therapeutic gases - ANS -are used to relieve symptoms and improve patient's
oxygenation
Anesthetic gases - ANS -are combined with oxygen to provide anesthesia during surgery
As an RT you should be aware of... - ANS --remain familiar with all aspects of gases used
in the clinical setting
-Fire Risk
-Medical compressed gases are classified as either non-flammable, oxidizing
(non-flammable but supportive of combustion) and flammable
Physical Characteristic of Medical Gases(Lab Gas) - ANS -
Physical Characteristic of Medical Gases(Therapeutic Gas) - ANS -
Storage and Handling of Oxygen (Medical Gas) - ANS --Stored in portable, high-pressure
cylinders or in large bulk reservoirs
-Bulk reservoirs require a separate distribution system to deliver the gas to the patient
Storage and Handling of Oxygen(Gas Cylinders) - ANS --Used to store and ship
compressed or liquid medical gases and are high-pressure cylinders
-Gas cylinders are made of seamless steel and are classified by the Federal Department
of Transportation (DOT), according to their fabrication method
Types of gas cylinders - ANS --Type 3A - made of carbon steel
-Type 3AA - made of steel alloy tempered for higher strength
Storage and Handling of Oxygen (Identification) - ANS --Marked with metal stamping on
the shoulders that supplies specific information
-(1st line) Letters DOT or ICC (Interstate Commerce Commission) are followed by the
cylinder classification (3A or 3AA) and the normal filling pressure in pound per square
inch (psi)
, -(2nd line) The letter size of the cylinder followed by the cylinder serial number
-(3rd line) Provides a mark of ownership, followed by the manufacturer's stamp or mark.
Storage and Handling of Oxygen (Identification) - ANS --On the other side of the cylinder
is information about the original safety test and dates of all subsequent tests
-Safety tests are conducted every 5-10 years, as specified in DOT regulations
-During these tests, cylinders are pressurized to 5/3 or 167% of their service pressure
-While the cylinder is under pressure, technicians measure cylinder leakage, expansion
and wall stress
Storage and Handling of Oxygen (Identification) - ANS --The notation EE followed by a
number indicates the elastic expansion of the cylinder in cubic cm
-A * next to the test date indicates DOT approval for 10 years
-A + sign means the cylinder is approved for filling 10% above its service pressure
-After hydrostatic testing, cylinders are subjected to internal inspection
Medical Gases(Filling (charging) cylinders) - ANS --the gas into its smaller volume
-In Pressure in a cylinder depends on the state of its contents
-In a gas filled cylinder, the pressure represents the force to compress liquid-filled
cylinder is the vapor pressure needed to keep the gas liquefied at the current temp
Safety Systems - ANS --Gas cylinders may contain a variety of gases
-(ASSS) American Standard Safety System
-Designed to prevent the interchange of cylinders containing different gases
-Different thread sizes and pitches are used to prevent interchange between large
cylinders (H)
Medical Gases(Safety Indexed Connector Systems) - ANS --American Standard Safety
System - (ASSS)
-Provides standards for threaded high-pressure connections between large compressed
gas cylinders (sizes F through H/K) and their attachments
Safety Systems - ANS --(PISS) Pin Index Safety System
-Small cylinder (E) valves use a yoke connection rather than a threaded connection for
equipment attachment (Flow meter)
-The face of the cylinder valve has two holes drilled in two of six specific positions
-The position of the drilled holes is unique for different gases
Medical Gases (Safety Indexed Connector Systems) - ANS --Pin Indexed Safety System -
(PISS)
-Pin indexing is part of the ASSS, but applies only to the valve outlets of small cylinders
up to and including E cylinders
