NFPA 99 Medical Gas Systems Practice
Exam for Installers and Inspectors
Questions and Answers Latest versions
Graded A+.
What additional characteristic must station outlets/inlets
have if not fully accessible?
Gas-specific connections with positive locking mechanisms.
What is an informative NFPA standard that contains
nonmandatory provisions?
Annex.
What must be documented for temporary installations of
medical surgical vacuum systems?
A process for inspection.
Who must witness the initial pressure tests performed by the
installing contractor?
ASSE 6020 inspector, an ASSE 6030 verifier, or the authority
having jurisdiction.
What should be maintained in the piping system during and
after installation?
A sealed nitrogen atmosphere to prevent ambient air or moisture
from entering.
Where must WAGD inlets be provided?
In all locations where local anesthesia is intended to be
administered.
What is the purpose of manifolds for gas cylinders?
To alternate the two headers during normal operation.
What should multiple vacuum pumps be sized to minimize?
Back pressure in accordance with the pump manufacturer's
recommendations.
What must valves in medical gas and vacuum piping
systems be tested for?
,Proper operation.
What are the requirements for central supply systems for
positive-pressure gases?
They must be protected from prolonged soil contact, well drained,
and secured.
How should each section of piping in medical gas systems
be pressure tested?
With the source valve remaining closed after installation of station
outlet/inlet rough-in assemblies.
What is the minimum reserve supply required for hyperbaric
care oxygen supply?
30 minutes
What type of signal should manifolds for gas cylinders have?
A master signal that indicates the operating status and activates
an indicator at alarm panels.
What is an oxygen concentrator unit?
An engineered assembly that raises the concentration of oxygen,
providing it as a drug product.
When may two or more vacuum piping systems be
interconnected during installation?
Only when the contents are the same and an inline valve has
been installed between the systems.
Where should the main line valve be located?
Behind a locked accessed door downstream of the source valve.
Where should zone valves be installed in patient care
spaces?
Immediately outside the area or zone being controlled.
Where should relief valves for Category 2 compressed air
systems be vented?
To the outside of the building or unoccupied room.
To whom should inspection and testing reports be
submitted?
To the party that contracted for testing, who will submit it through
channels to the responsible facility authority.
When is a shutoff valve required in the main supply line?
, Inside the buildings being served, except where the source and
source valves are located inside the building.
A WAGD source system shall activate the _________ alarm
when the backup or lag producer is running.
Local
A category 1 dedicated WAGD source shall consist of
________ or more producers, each shall be sufficient to
serve the peak calculated demand.
2
Additional WAGD producers shall be ______ activated when
the producer(s) in operation is (are) incapable of maintaining
the required vacuum
Automatically
Category 1 medical-surgical vacuum sources shall consist of
an automatic means to prevent ______ through any off-cycle
vacuum pump.
Backflow
Category 1 medical-surgical vacuum sources shall, at a
minimum, consist of _______ or more vacuum pumps.
2
Category 1 medical-surgical vacuum systems shall activate
which alarm when the backup or lag pump is running?
Local
If WAGD is produced by the medical surgical vacuum source,
the total concentration of oxidizers of oxygen (%O2) shall be
maintained below ______ percent.
23.6%
If the WAGD system is joined with the medical surgical
vacuum piping, it shall be connected at a minimum distance
of ______ feet from any vacuum inlet.
5
Medical surgical vacuum receivers shall be made of what
kind of materials ______ ?
deemed by the manufacturer
Exam for Installers and Inspectors
Questions and Answers Latest versions
Graded A+.
What additional characteristic must station outlets/inlets
have if not fully accessible?
Gas-specific connections with positive locking mechanisms.
What is an informative NFPA standard that contains
nonmandatory provisions?
Annex.
What must be documented for temporary installations of
medical surgical vacuum systems?
A process for inspection.
Who must witness the initial pressure tests performed by the
installing contractor?
ASSE 6020 inspector, an ASSE 6030 verifier, or the authority
having jurisdiction.
What should be maintained in the piping system during and
after installation?
A sealed nitrogen atmosphere to prevent ambient air or moisture
from entering.
Where must WAGD inlets be provided?
In all locations where local anesthesia is intended to be
administered.
What is the purpose of manifolds for gas cylinders?
To alternate the two headers during normal operation.
What should multiple vacuum pumps be sized to minimize?
Back pressure in accordance with the pump manufacturer's
recommendations.
What must valves in medical gas and vacuum piping
systems be tested for?
,Proper operation.
What are the requirements for central supply systems for
positive-pressure gases?
They must be protected from prolonged soil contact, well drained,
and secured.
How should each section of piping in medical gas systems
be pressure tested?
With the source valve remaining closed after installation of station
outlet/inlet rough-in assemblies.
What is the minimum reserve supply required for hyperbaric
care oxygen supply?
30 minutes
What type of signal should manifolds for gas cylinders have?
A master signal that indicates the operating status and activates
an indicator at alarm panels.
What is an oxygen concentrator unit?
An engineered assembly that raises the concentration of oxygen,
providing it as a drug product.
When may two or more vacuum piping systems be
interconnected during installation?
Only when the contents are the same and an inline valve has
been installed between the systems.
Where should the main line valve be located?
Behind a locked accessed door downstream of the source valve.
Where should zone valves be installed in patient care
spaces?
Immediately outside the area or zone being controlled.
Where should relief valves for Category 2 compressed air
systems be vented?
To the outside of the building or unoccupied room.
To whom should inspection and testing reports be
submitted?
To the party that contracted for testing, who will submit it through
channels to the responsible facility authority.
When is a shutoff valve required in the main supply line?
, Inside the buildings being served, except where the source and
source valves are located inside the building.
A WAGD source system shall activate the _________ alarm
when the backup or lag producer is running.
Local
A category 1 dedicated WAGD source shall consist of
________ or more producers, each shall be sufficient to
serve the peak calculated demand.
2
Additional WAGD producers shall be ______ activated when
the producer(s) in operation is (are) incapable of maintaining
the required vacuum
Automatically
Category 1 medical-surgical vacuum sources shall consist of
an automatic means to prevent ______ through any off-cycle
vacuum pump.
Backflow
Category 1 medical-surgical vacuum sources shall, at a
minimum, consist of _______ or more vacuum pumps.
2
Category 1 medical-surgical vacuum systems shall activate
which alarm when the backup or lag pump is running?
Local
If WAGD is produced by the medical surgical vacuum source,
the total concentration of oxidizers of oxygen (%O2) shall be
maintained below ______ percent.
23.6%
If the WAGD system is joined with the medical surgical
vacuum piping, it shall be connected at a minimum distance
of ______ feet from any vacuum inlet.
5
Medical surgical vacuum receivers shall be made of what
kind of materials ______ ?
deemed by the manufacturer
