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Worksheets2024 Practice Test #2
Total questions: 100
Worksheet time: 50mins
Prior to any installation work, which of the following documentation shall be provided and maintained on site by the installer?
Braze test coupon
Brazing history and procedure qualification
Brazing procedure and date of expiration
Qualification of brazing procedures and individual brazers
Clean, non-shedding abrasive pads shall be used to clean the exterior surfaces of the tube ends, and shall not result in ___________ the surfaces to be joined..
cleaning
grooving
either of the outcomes listed are acceptable
neither of the outcomes listed are acceptable
Mechanical ventilation shall have the opening(s) located _____________ and located adjacent to the cylinders or containers.
within 1 ft. of the floor
within 1 ft. of the ceiling
within 1 ft. of the floor and within 1 ft. of the ceiling
there are no guidelines regarding placement of the opening(s)
Refer to Diagram #4, identify #14.
In-line valve
EOSC
Future valve
Zone valve
To assure that all ambient air has been removed from the pipeline prior to brazing, a/an __________ shall be used to verify the effectiveness of the nitrogen purge.
Oxygen analyzer
Nitrogen analyzer
Breathalyzer
Air analyzer
Refer to Diagram 1. This is a picture of a tool used to dimple fittings to a mechanically limited depth, what is the minimum depth for 1.25" (1.375" OD) tubing?
.25 in.
.28 in.
.31 in.
.34 in.
Which of the following is labeled incorrectly?
Oxygen with green background and white text
WAGD with green background and white text
Medical air with yellow background and black text
WAGD with violet background and white text
After completion of the installer-performed tests, individual pressurization is one method used to determine that no cross-connection exists. All systems are dropped to zero, and the system being tested will be pressurized to a gauge pressure of __________.
30 psi
50 psi
150 psi
300 psi
Refer to Diagram #3, choose the correct distance for the location at capital letter D.
10'
20'
25'
There is NOT a stated requirement in NFPA 99
Where medical gas systems operate at pressures other than the standard gauge pressures, which of these is required to be listed on the station outlet identification?
Gas registration number and a toll-free number to call for information
Name of the gas and the non-standard operating pressure
Name of the gas
The non-standard operating pressure
Excluding outdoor locations, which of these is an NFPA 99 requirement for the wiring of each of the two mandatory master alarms?
Wired independently to the initiating device(s) for each signal
Without splices
Alarms shall be sent to the area alarm panel in the emergency room
Common conductors
Indicators adjacent to __________ shall be labeled to identify the name or chemical symbol of the system that they monitor.
master alarm actuators
area alarm actuators
local alarm actuators
master and area alarm actuators
What is NOT required for the purity parameters of medical air?
Medical air must be a bulk system
Dew point must be
35º F or less
Gaseous hydrocarbons must be less than 30 ppm
Carbon monoxide must be less than 10 ppm
The source valve on a cryogenic fluid source, shall be installed by persons holding which certification?
ASSE 6010
ASSE 6015
ASSE 6030
ASSE 6035
An assembly of equipment that holds a capacity greater than ______ cubic feet is defined as a
Bulk Oxygen System.
3,000
10,000
20,000
28,000
Where compressors that separate the oil containing section from the compression chamber are used, each compressor shall be monitored for which of the following?
Gaseous hydrocarbons
High temperature
Liquid hydrocarbons
Both gaseous hydrocarbons and high temperature
Instrument air intake shall be permitted to be drawn from all EXCEPT ________________.
outside
outside within 25 feet of an exhaust
a clean air duct
the equipment room
Stainless steel tube may be joined by any method EXCEPT which of the following?
Braze
Gas Tungsten Arc Welding (GTAW)
Metal Inert Gas (MIG)
Tungsten Inert Gas (TIG)
Vacuum piping for ________ shall be connected separately from the medical-surgical system, directly to the receiver tank through its own isolation valve and fluid trap located at the receiver.
Each WAGD system
A location requiring seismic restraint
The standing vacuum test
A teaching laboratory
Which type of connectors shall connect medical air compressors with their intake and outlet piping?
Insulated
Dielectric
Compression
Flexible
Which type of tube hangers are permitted in a potentially damp location?
Carbon steel
Copper coated
Plastic coated
Solid copper
Audible and visual alarm indicators shall meet which of the following Requirements?
Testing to determine indicator function should be scheduled periodically and records maintained between testing
Individual indicators shall NOT be less than DN20 size
CGA C-7
The staff should be trained to operate the test button periodically and report malfunctions
Medical gas alarm wiring shall be protected by which of the following? Choose the answer that includes ALL permitted options.
Conduit or free air
Conduit, free air or wire
Conduit, free air, wire or cable tray
Conduit, free air, wire, cable tray or raceways
How many hours must the medical air compressor system be operating normally, before air quality tests can be performed?
2
8
12
24
The level of sedation allowed for use in a Category 2 dental health facility is which of the following?
General anesthesia and deep sedation
Maximum sedation only
Minimal or no sedation
Moderate and minimal
Which of these is a requirement for a station inlet?
A secondary demand valve
A primary valve
A main vacuum line
A primary optional in-line
Clean, _______ shall be used to clean the exterior surfaces of the tube ends, and then wiped clean using a lint-free white cloth.
non -shedding steel wool
non-shedding sand cloth
non-shedding sand screen
non-shedding abrasive pads
Fittings for positive pressure medical gas systems shall be cleaned for oxygen service by __________ in accordance with CGA G-4.1.
The manufacturer
The supplier
A third party agency other than the manufacturer
Any of the choices are acceptable
The medical air compressor intake shall be located a minimum of ____ feet from plumbing vents, ____ feet above the ground, and shall be _________________.
10, 25, plugged or capped
15 ,20, CMT
25, 10, screened
25, 20, turned down and screened
Instrument air systems shall be located ____________ in a dedicated mechanical room, with adequate ventilation and required utilities.
indoors
outdoors
on the roof
in the basement
Medical support gas sources shall be permitted to be piped into, or used for, any purpose EXCEPT________________.
areas for treatment of patients or laboratories, if appropriate to the procedures
general utility purposes
non-medical support applications
powering equipment used in patient care procedures, or operating medical-surgical tools
Stainless tube may be joined by any of the following methods EXCEPT which?
Soldering
Tungsten inert gas (TIG)
Gas tungsten arc welding (GTAW)
Metal inert gas (MIG)
The scale range of positive pressure analog indicators, shall have the normal pressure fall within the ______ percentage of the gauge scale.
1/4
1/3
1/2
2/3
WAGD networks shall provide a(n) ___________ inlet/outlet in all locations where nitrous oxide or halogenated anesthetic gas is intended to be administered.
Vacuum
WAGD
Oxygen
Medical air
Computer systems used as a master alarm shall be continuously attended, or shall provide remote signaling of responsible parties through all of the following EXCEPT __________.
pagers
telephone
cell phone
The maximum support spacing for 2.5" or larger plastic pipe used in dental vacuum systems is ________.
3 feet
4 feet
5 feet
6 feet
The master alarm system shall include an indication from each compressor site, when the medical air dew point is greater than _______° F.
22
32
40
35
Brazing performed between cryogenic fluid central supply system vessels and their vaporizers, shall be permitted to be brazed using _________________.
BCuP with flux
BAg with flux
BAg without flux
Any of the listed materials are permitted
The cryogenic fluid central supply system shall have a local signal that visibly indicates the operating status, and an indicator at all master alarms, when or at a predetermined set point before the reserve internal pressure falls too low for the reserve to operate properly indicating ____________.
system failure
reserve failure
maintenance needed
emergency reserve in use
__________________ fittings shall not be required on zone valve pressure indicators.
Gas specific demand check
1/8 inch threaded
1/4 inch threaded
Gas specific D.I.S.S.
Each outlet in a medical gas piping shall be purged until there is no discoloration on _________.
the cleaned test equipment
a clean filter
a clean white cloth
a clean outlet body
Instrument air standby headers shall have a minimum of _______ cylinders attached.
an average day’s supply
1 hour of normal operation
3
4
Oxygen concentrator supply systems used as all three sources of supply shall include all of the following EXCEPT:
A documented risk analysis by the governing authority
An isolation valve and check valve shall be provided to isolate each of the three sources
Shall join the pipeline systems through control arrangements that allow a flow of 100 percent of the peak calculated demand
An NPS 1/8 valved sample port shall be provided on the patient side of the line pressure controls, and the source side of the source valve, for sampling of oxygen
The master alarm system shall consist of two or more alarm panels at sperate locations. One panel should be located in the office or work space, of the on-site individual responsible for maintenance of the med gas and vacuum systems. The other panel shall be located in an area of __________________.
public occupancy
continuous surveillance
emergency surveillance
continuous observation
The master alarm system shall activate when the pressure in the main supply lines increase or decrease by ________ percent.
10
20
40
50
Which of the following is true of Category 1 support gases?
Permitted to power medical-surgical tools and subject to greater hazards present in other piped gases
Used for respiration
Used to calibrate respiratory equipment
None of the choices listed are correct
What percent of the zones shall be tested at the outlet most remote from the source, to verify the piping particulate test?
25%
50%
75%
100%
What is the standard gauge pressure (in. HgV) for a medical-surgical vacuum service?
12 - 24
50 - 55
15 - 30
It varies with system type
Central supply systems for nitrous oxide and carbon dioxide using cylinders or portable containers, shall be prevented from reaching temperatures lower than ______º F.
20
-20
32
125
ASSE 6000 Annex J provides “Recommended Guidelines for Conducting Planned Medical Gas Systems Shutdown and Temporary Backfeed”. Annex J guidelines do NOT include a list of responsibilities for which type of worker?
Medical Gas Generalist
Installer
Shutdown Coordinator
Verifier
When is the initial pressure test conducted by the installer?
After the blow down of the distribution piping
After installation of the alarm sensors
Before blow down of the distribution piping
Before installation of station rough-in assemblies
A method used to provide a source of drainage, aspiration and suction in order to remove bodily fluid from patients.
Anesthesia
Negative pressure
WAGD
Medical-surgical vacuum
Standby headers shall be allowed in medical air compressor area only under which circumstance?
When there is no instrument air equipment in the area
When there is sufficient supply for 1 hour normal operation
Only empty cylinders are allowed
Only Nitrogen is allowed at compressor site
A patient care space is any space of a health care facility wherein patients are intended to be ________.
Admitted or discharged
Sent for x-rays
Interviewed
Examined or treated
Medical air compressor intake shall be located outdoors a minimum distance of ______ from all doors, windows or other openings in the building,
10 ft
20 ft
25 ft
There is no distance requirement
Prior to the installation of a manufactured assembly, documentation shall be provided for all EXCEPT which of the following tests?
Cross connection test
Initial pressure test
Piping purge test
Operational pressure test & Standing pressure test
Refer to diagram 4. The valve labeled #11 is a __________.
Source Valve
Zone Valve
Main line valve
Emergency shutoff valve
Medical air compressors shall be sufficient to serve the peak calculated demand, with the largest single compressor out of service. In no case shall there be fewer than ________ compressors.
2
3
4
5
The final connection between new piping and an existing vacuum system, shall be tested with a(n) __________________ or other means that will allow detection of leaks in an active
supersonic leak detector
oxygen analyzer
ultrasonic leak detector
dew point monitor
Which of the following systems shall NOT be permitted to be located in an outdoor enclosure?
Bulk cryogenic liquid system
Manifolds for cryogenic liquid cylinders
Manifolds for gas cylinders, with or without reserve
Medical air compressor supply sources
A medical air proportioning system shall have a minimum of how many recorders, in order to record system performance and air quality for a period of no less than 24 hours?
1
2
3
4
The medical-surgical vacuum exhaust shall be turned down and screened. The screening material shall be fabricated using what type of material?
Steel mesh
Steel wire
Any non-corroding material
Any non-corrosive material
What is the maximum length of flexible connectors, when used for a category 1 dental system?
3 feet
5 feet
7 feet
No longer than necessary
Cryogenic fluid central supply systems shall include ___________, sized for greater than an average day’s supply, with capacity determined after consideration of the customer usage requirements, delivery schedules and proximity to alternative supplies, and the emergency
a reserve header
a reserve supply
a reserve regulator
a reserve connection
Mechanical exhaust for central supply locations shall not be more than __________.
50 cfm
72 cfm
100 cfm
500 cfm
Cryogenic fluid central supply systems shall be installed in accordance with ____________.
21 CFR 210
21 CFR 211
CGA M-1
all that are listed
To assure that all ambient air has been removed from the pipeline prior to brazing, an oxygen analyzer shall be used to verify the effectiveness of the nitrogen purge. The oxygen level shall read below _______ before brazing begins.
1%
3%
5%
10%
Outdoor bulk cryogenic liquid systems shall have at least ___ means of egress provided for any enclosure.
1
2
3
4
Which level of anesthesia is described as: A drug-induced state during which patients respond normally to verbal commands?
General anesthesia
Deep sedation/analgesia
Moderate sedation/analgesia
Minimal sedation (anxiolysis)
New or replacement shutoff valves for medical gas pressure piping systems shall __________.
Be quarter turn valves
Be of materials suitable for the service
Have extensions for brazing
All of the choices are required
Which of the following is labeled incorrectly?
Instrument air with green background and white text
Instrument air with red background and white text
Medical air with yellow background and black text
WAGD with violet background and white text
The maintenance of a Category 1 medical gas system must be performed by individuals trained & certified by health care facility or a person certified in which of the following Code/Standard?
ASSE 6040
ASTM 6010
AWS B-22
CGA - 4.1
The complete source of supply for a medical gas or vacuum system or a medical support gas system?
Central supply system
Compressed medical gases
EOSC
Medical air compressor
The source valve on a cryogenic fluid source, shall be installed according to which standard?
NFPA 55
NFPA 99
NFPA 101
NFPA 70
If a non-metallic connector is being used in a Category 1 health care facility to connect the manifold to the distribution piping, what is the maximum length (feet) permitted for the flexible connector?
5 ft
They shall be no longer than necessary
3 ft
The use of flexible connectors is not permitted
Factory installed outlet tubes on station inlets shall not be less than ____NPS with 0.4 inch minimum inside diameter.
1/4
3/8
1/2
5/8
A medical gas master or area alarm panel, should be set to actuate a(an) __________ indicator when the communication with the alarm-initiating device is disconnected.
Audible
Visual
High and low
Audible and visual
After a final brazed connection in a positive pressure medical gas pipeline is made without a purge, an outlet in the immediate ______ zone of the affected portions of both the new and existing piping shall be tested.
upstream
downstream
upstream and downstream
parallel
What is the standard gauge pressure (psi) for medical air gas service?
0-300
50-55
15-30
It varies with system type
What is the standard gauge pressure (in. HgV) for WAGD service?
12-24
50-55
15-30
It varies with system type
Station outlets in systems having nonstandard operating pressures shall be ______________.
gas specific
pressure specific
self removing
gas specific and pressure specific
In those portions of systems intended to handle oxygen at gauge pressure greater than ________ psi, interconnecting hoses shall contain no polymeric materials.
350
335
450
435
Which of the following is NOT an approved means of securing for all valves, other than those located in zone valve box assemblies?
inaccessible above ceilings
latched in their operating position
Located in secure areas
Locked in their operating position
Refer to diagram 4. Area A would be classified as a __________.
Patient care area
Anesthetizing area
Critical care area
Waste disposal area
The accuracy of digital indicators shall be +/- _____ % of the operating pressure at which they are used.
1
3
5
7
Which source shall NOT be used to power the venturi of a WAGD system?
Instrument air
Medical Air
Water
Inert gas
Medical air compressor systems shall have a pressure relief valve set at _____ percent above line pressure.
20
30
40
50
All cryogenic fluid systems shall be provided with an auxiliary source connection point, of the same size as the main. Which statement is true of the connection point?
It shall be located immediately on either side of the source valve
It shall consist of a tee, a valve and a plug or cap
It shall always be kept closed and secured
It shall consist of a tee, a valve and a plug or cap and It shall normally be kept closed and secured
Each set of wires from a master alarm shall NOT run ______ to the alarm initiating device they monitor.
with interruption
without interruption
with or without interruption
NFPA 99 does not specity
Pressure/vacuum indicators shall be readable from a ___________ position
sitting
standing
climbing
sitting, standing or climbing
When a single source supplies multiple free standing buildings,
where is the required location for the main line valve?
At the source
At the branch connection
Inside each building served
Outside each building served
A single initiating device shall be permitted to actuate ________ master alarms.
1
2
3
multiple
Each alarm shall be ___________ for its area of surveillance.
wired
labeled
observed
installed
Inspection and testing shall be performed on all new piped gas systems, additions, renovations, temporary installations or repaired systems, to assure the facility that all applicable provisions of NFPA 99C have been adhered to and system integrity has been achieved or maintained. What is required of the of the individual doing the testing or inspecting?
Have two years experience
Have a documented process & procedure
Be a certified tester
None of the choices are correct
Which of the following is an instrument air quality requirement?
It shall be compliant with instrument air section in ANSI/ISA S-7.0.01
It shall be compliant with medical air USP
It shall be filtered to .7 micron
It shall be dry to a dew point of -30º F
A system used in dentistry for oral evacuation and nitrous oxide/oxygen scavenging.
Category 4 vacuum pump system
Dental vacuum/scavenging system
Medical-surgical vacuum system
WAGD system
Hyperbaric chambers when used in a veterinary care facility, shall be classified as _________.
Class A
Class B
Class C
There is no classification for veterinary care
What is the standard gauge pressure (in. HgV) for a combination medical-surgical vacuum/WAGD service?
12-24
15-30
50-55
It varies with system type
Refer to diagram 3. What is the minimum distance requirement at letter C?
10 feet
15 feet
20 feet
25 feet
What is the standard gauge pressure (psi) for nitrous oxide gas service?
12-24
15-30
50-55
0-300
