Medical Gas Line Practice Test

These questions are part of the practice quiz. Start practicing

• What is required of an individual conducting tests on gas systems?
• Which material is typically not allowed in medical gas systems?
• What triggers a high dew point alarm for medical air?
• How often should pipe labels be placed in a medical gas system?
• How often should medical gas piping be inspected?
• Where should the master alarm panels be located?
• What is the minimum NPS size for mains, branches, and drops to individual service outlets in level 3 oxygen piping?
• What must manifolds for gas cylinders activate when changing over from one header to another?
• Where is it mandated to locate air intakes for compressors?
• A shut-off valve shall be provided in the main supply line when the source valve is not accessible from within the building served. What is the name given to this valve?
• When does the instrument air system activate the alarm regarding dew point?
• What is the minimum angle for rising run-outs in gas piping systems?
• What type of material should be used for the screening of medical-surgical vacuum exhaust?
• What is required for the maintenance or repair of medical air compressor systems?
• What component is essential for isolating equipment in a medical air system during maintenance?
• Which purge gas is commonly used during brazing?
• What type of piping is recommended for level 3 positive-pressure medical gases?
• What is the role of NFPA 99 in medical gas systems?
• In central supply systems using gas cylinders, what component is installed at each cylinder connection to prevent gas loss in case of damage?
• In medical gas systems, what is the purpose of an alarm system?
• Do dryers, filters, and regulators in medical air systems need to be at least duplexed?
• When does the medical air dew point high alarm activate?
• At what level of carbon monoxide should the alarms be activated?
• Why is monitoring the dew point in medical air systems important?
• True or False: A main line valve is not required when the source shutoff valve is accessible from within the building.
• What is required downstream of each regulator or immediately downstream of the isolating valves for the regulators?
• What is the only permissible use for medical air sources?
• What is the minimum size for factory-installed tubes on outlets?
• Station outlets over 80 psi must have what type of connection?
• Where should medical air filters be located in relation to the final line regulator?
• Do charcoal filters in medical air systems require colorimetric hydrocarbon indicators?
• In a cryogenic liquid cylinder system, where should the gas produced by evaporation from the secondary header enter the supply system?
• How far can factory-installed tubes on outlets/inlets extend from the body?
• Where should underground piping be installed?
• True or False: Vacuum receivers must withstand atmospheric pressure only.
• How long does brazer qualification remain valid?
• What percentage of zone valve outlets must be tested for compliance?
• Where should medical air filters be located in the system?
• Which connection does not require nitrogen purge?
• What is necessary for oxygen, nitrogen oxides, and mixtures of these gases regarding their communication with certain locations?
• What is the potential hazard of using oxygen near sources of ignition?
• What must be outside each vital life support and anesthetizing location for emergencies?
• In which situation would you most likely use a portable oxygen cylinder?
• Which component is essential to prevent backflow in medical gas systems?
• What is the rated accuracy of pressure indicators used for testing?
• Medical air compressors designed to separate the oil-containing section from the compression chamber must have what type of filter?
• What critical safety feature must be implemented for compressor electrical service?
• What is the purpose of a final line filter in a medical gas line system?
• What is the role of a vacuum system in a medical facility?
• What alarm activates when the main supply reaches an average day supply in a bulk cryogenic system?
• For which gas is a minimum 1/4 inch NPS required in level 3 systems?
• How should medical gas piping be identified?
• True or false: New or replacement shut-off valves for medical gas pressure piping systems shall be quarter-turn full ported ball tight valves.
• What is required for all medical gas alarm systems?
• What is medical air primarily used for?
• Which source shall not be used to power the Venturi of a WAGD system?
• When should area alarms be tested to verify warning signals in critical care areas?
• During an initial pressure test, what should be the test pressure gas?
• Can multiple vacuum pumps be joined together to one common exhaust?
• What carbon monoxide level triggers a medical air alarm?
• What is the required melting point for brazing alloy?
• What provides an indication of pressure downstream from regulators in gas supply systems?
• What is the name given to the shut-off valve installed on all lateral branch piping from a main or riser?
• What should be connected to the master alarm panels to indicate a problem with source equipment?
• What triggers a high dew point alarm for instrument air?
• When should the local dew point alarm activate for instrument air?
• What type of alarm system must instrument air systems have to indicate when the backup compressor is in operation?
• True or False: Medical air compressor systems shall have a manual shutoff valve to isolate each compressor for maintenance or repair.
• What is the minimum efficiency rating for medical air filters at 1 micron?
• What is the minimum efficiency rating for instrument air filters at 0.01 microns?
• Which of the following indicates a compliance requirement for medical gas installations?
• What is the required dew point for instrument air systems?
• Where should activated carbon filters be located in an instrument air system?
• Is it permissible to use adapters or conversion fittings to adapt one gas-specific fitting to another except for testing and verification?
• What are the requirements for shut-off valves for positive-pressure gases?
• Instrument air systems should maintain a dew point of which temperature or lower?
• When should the master alarm activate due to supply line pressure changes?
• Emergency electrical service for compressors must meet which system requirements?
• What is a crucial characteristic for the exhaust used in medical-surgical vacuum systems?
• What pressure should instrument air sources produce at a minimum?
• What is the minimum backfill cover for buried piping?
• Where must the compressor air intakes be located?
• What should happen if another alarm condition occurs while the audible alarm is silenced?
• What action should be taken if the dew point alarm triggers?
• What must all master, area, and local alarm systems include?
• Vacuum receivers must be capable of withstanding what gauge vacuum?
• Which pressure is typically maintained in medical gas pipelines?
• What must be done after cutting tubing in medical gas systems?
• In a standing pressure test, what is the recommended practice regarding the source valve and pressure level?
• What joint types are permitted for medical gas piping?
• True or false: Functional testing is unnecessary during system renovations if no piping is exchanged?
• Which of the following systems is prohibited from being located in an outdoor enclosure?
• What is the minimum required pressure for instrument air?
• Which feature is essential in medical air receivers?
• What type of filter must medical air compressors designed to separate the oil-containing section from the compression chamber be equipped with?
• In system renovations where no piping is exchanged, what is performed to ensure other equipment has not been impacted negatively?
• Which of the following is NOT typically included in a medical air system?
• What type of outlet must each station outlet or inlet be?
• What is the significance of the marker above buried gas lines?
• Final line filters for instrument air shall be equipped with what kind of indicator?
• What is the purpose of pressure gauges in medical gas systems?
• Which type of maintenance is crucial for ensuring the reliability of medical gas systems?
• How often should gases from compressors be analyzed for hydrocarbon content?
• Medical air filters must be rated for what minimum efficiency at 1 micron or greater?
• What must be done if the dew point exceeds the alarm threshold?
• Should cylinders in use and in storage be prevented from reaching temperatures exceeding 125°F?
• Which alarms activate when the reserve supply takes over in a cylinder-supplied system?
• How can you confirm there is no cross-connection between various medical gas and vacuum piping systems?
• What alarm condition activates when the dew point of instrument air exceeds -22°F?
• What activates a local alarm in a liquid ring compressor system?
• Can level two medical air compressors be simplex?
• For optimal safety, what is a necessary feature of oxygen storage systems?
• What is one of the major risks if alarms are ignored in a medical gas system?
• What should the design of a medical air compressor include to ensure proper functioning?
• What happens when the liquid level exceeds the design level in liquid ring compressors?
• What does a level 3 moisture indicator signify in medical air systems?
• What is a common standard for the installation of medical air systems?
• What is the minimum NPS size for mains, branches, and drops to individual service outlets for level 3 nitrous oxide?
• Which gas is primarily used for respiratory support in a medical setting?
• Instrument air systems should be interconnected with medical air systems that have two or more compressors: True or False?
• What is the minimum efficiency rating for final line filters in instrument air systems at 0.01 micron?
• What dew point should activate the required alarms when the dew point at system pressure exceeds?
• What feature should final line filters for instrument air have?
• Which type of supply air sources is not allowed in outdoor enclosures?
• What is the minimum NPS for vacuum system mains/branches?
• Which gas is commonly mixed with oxygen to improve patient comfort during long-term therapy?
• Can gas piping be installed in the same trench as electrical/fuel lines?
• Which type of material is preferred for level 3 vacuum systems?
• A continuous tape or marker placed immediately above a buried line enclosure must be identified by what?
• When should the vacuum system alarm activate?
• True or False: Carbon Monoxide shall activate both the local and all master alarms when the level exceeds 10ppm.
• What should area alarm panels indicate?
• What filler metal is used for brazing copper-to-copper joints?
• What should medical air receivers be equipped with?
• Which of the following is NOT a requirement for medical gas alarms?
• What is the required dew point for instrument air?
• What type of sensor is necessary in air receivers when using water cooler aftercoolers?
• How should the changeover from one header to another in a gas cylinder manifold system be signaled?
• What is the purpose of a shut-off valve in a medical gas system?
• What is the minimum NPS for medical gas mains/branches?
• What gas is used for installer pressure tests in medical gas lines?
• In medical vacuum systems, what is the primary function of check valves?
• What is the purpose of the pressure relief valve in medical air compressor systems?
• What is considered a safe relative humidity level for medical air systems?
• Medical air compressor systems must have a pressure relief valve set at what percentage above the line pressure?
• Medical air should be sampled at which type of valve sample port?
• What should all valves, except zone valves, be?
• Where should area alarm sensors be in anesthetizing areas?
• What type of maintenance is required for alarm systems in medical gas lines?
• What is the chemical symbol for Medical Air?
• What materials must relief valves for all positive pressure supply systems be made of?
• How soon after cleaning should brazing occur?
• Which type of compressor feature helps in monitoring water levels in systems?
• What valve must be operable from a standing position in the corridor it serves?
• Where should the liquid drain from a level 3 vacuum source be connected?
• A riser valve should be adjacent to and labeled as:
• What is the acceptable maximum level of carbon monoxide in ppm for medical systems?
• When medical air piping systems operate at different pressures, where should the piping separate?
• Which type of compressor is commonly used with instrument air systems?
• What is required for vacuum exhausts from multiple pumps joined to a common exhaust?
• What should be the scale range of a positive-pressure analog indicator?
• Which type of air is used for respiratory support for patients?
• What should medical air receivers be provided with?
• Which item is essential to prevent loss of gas for cylinders in a central supply system if damage occurs?
• Which of the following components is essential for the filtration process in instrument air systems?
• Which medical gas is used for anesthetic purposes?
• What material should plastic piping in level 3 vacuum systems be made of?
• Compressors monitored for gaseous hydrocarbons should be checked how often?
• How many vacuum pumps must Level 1 Medical-surgical vacuum sources consist of as a minimum?
• Where should the testing report from gas systems be sent?
• What must be provided downstream of each pressure switch and mainline gauge?
• What does the acronym NFPA stand for?
• What joint type is prohibited in gas/vacuum systems?
• Hangers for copper tube should be made from which material?
• What should be used for cleaning and maintaining medical gas delivery systems?
• Final line filters in instrument air systems should be rated for what particle size?
• What type of connectors must be used in non-accessible hose or flexible station outlets?
• What filler metal is used for brazing dissimilar metals?
• What should happen when the backup or lag compressor is running in a medical gas system?
• Instrument air sources with a standby header shall be alarmed at which locations?
• What type of valve should be placed at the immediate connection of each source system to the distribution piping system?
• What is the function of zone valves in medical gas systems?
• What is the primary function of a medical gas pipeline?
• True or false: Flex hose and connectors must have a minimum burst pressure of 1000 PSI?
• What is the minimum requirement for in-building emergency reserves of medical gases?
• Who must clean fittings for positive pressure medical gas systems for oxygen service?
• Which type of system requires continuous monitoring to ensure gas levels are maintained?
• How long must the initial pressure test be held to ensure safety?
• What is the minimum schedule thickness for PVC piping in level 3 vacuum systems?
• What must be installed for a bulk cryogenic liquid oxygen supply system that is remote from the served building?
• What should be installed on the main supply line in level 3 central supplies remote from medical gas system use points?
• What activates when the backup or lag pump is running in Level 1 medical-surgical vacuum systems?
• What is a common characteristic required for instrument air sources to ensure safety and efficiency?
• True or False: All brazed joints must be examined for leakage using soapy water or safe alternatives for oxygen during the initial pressure test.
• How often should medical gas systems be inspected for safety compliance?
• What is the maximum allowable carbon monoxide level in medical air samples for compressor systems?
• What type of ventilation is required for indoor supply locations when the total volume of medical gases exceeds 3,000 ft³?
• What should be prevented from exceeding 125°F in terms of gas cylinder storage?
• What should be monitored at the master alarm for each medical gas system?
• Instrument air sources must be filtered with activated carbon filters and be located upstream of final line filters: True or False?
• What is a typical first response when the master alarm goes off?
• Where should area alarm sensors be located in critical care areas?
• What type of condensate management must aftercoolers in medical air systems be equipped with?
• Through which method is nitrous oxide commonly administered to patients?