MED GAS STUDY GUIDE QUESTIONS
AND ANSWERS
When.is.the.initial.pressure.test.conducted,.by.a.medical.gas.installer,.on.a.nitrous.oxide.sy
stem?.- .ans-After.blowdown.of.a.distribution.piping
In.those.portions.of.systems.intended.to.handle.oxygen.at.pressures.greater.than.350.psi.t
he.interconnecting.hose.shall.NOT.contain.________.materials?.- .ans-Polymeric
In.a.Category.1.Dental.and.Gas.Vacuum.Piping.system,.which.of.the.following.is.an.NFPA.
99.requirement.for.the.labeling.of.pipes?.- .ans-Color.coding.&.non-standard.pressure
Which.of.the.following.treatments.shall.be.performed.before.brazing.cut.ends.of.a.tube.to.b
e.installed.in.a.medical.gas.piping.system?.- .ans-
Cut.ends.shall.be.rolled.smooth.or.deburred
Manifolds.for.gas.cylinders.shall.actuate.a(an)._______.signal.and.shall.activate.an.indicat
or.at.all._______.alarm.panels.to.indicate.when.or.just.before.changeover.from.one.header
.to.the.other..- .ans-Local,.master
In.a.non-anesthetizing.area,.on.which.side.of.a.zone.valve.shall.the.pressure/
vacuum.sensor.be.located?.- .ans-Station.outlet/inlet
What.is.the.purpose.of.using.an.oxygen.analyzer.during.the.piping.purge.prior.to.brazing?.-
.ans-Assure.that.all.ambient.air.has.been.removed.from.the.pipeline
A.medical.gas.master.or.area.alarm.panel.shall.be.set.to.actuate.a(an)._____.indicator.whe
n.the.communication.with.an.alarm-initiating.device.is.disconnected..- .ans-
Audible.and.visual
When.an.EOSC.becomes.the.temporary.supply.source,.a.facility.will.monitor.the.system.by
.use.of.which.of.the.following?.- .ans-
Providing.four.connection.points.to.both.master.alarms
,Which.of.the.following.conditions.must.be.met.where.medical.gas.and.vacuum.systems.ar
e.installed.by.non-certified.personnel?.- .ans-
installation.by.anyone.other.than.6010.certified.personnel.is.NOT.permitted
Which.of.the.following.systems.shall.NOT.be.permitted.to.be.located.in.an.outdoor.enclosu
re?.- .ans-Medical.air.compressor.supply.sources
Metallic.flexible.joints.are.being.used.in.the.pipeline.for.vibration.control..Which.of.the.follo
wing.is.NOT.required.of.such.joints?.- .ans-suitable.for.service.at.150.psig.or.above
who.shall.witness.the.installer-performed.standing.vacuum.test?.- .ans-
the.authority.having.jurisdiction,.or.its.designee
the.medical.air.compressor.intake.shall.be.located.a.minimum.of.how.many.feet.from.any.e
xhaust.or.plumbing.vents?.- .ans-25.feet
the.gas.produced.by.evaporation.from.the.secondary.header.in.a.cryogenic.liquid.cylinder.
system.shall.enter.the.supply.system.________.of.the.final.line.regulator..- .ans-upstream
with.the.approval.of.the.Authority.Having.Jurisdiction,.in.which.areas.shall.the.zone.valves.
be.permitted.to.be.secured.to.prevent.inappropriate.access?.- .ans-pediatric
factory.installed.inlet.tubes.on.station.outlets.shall.be.NOT.less.than.__________with.0.3.i
nch.minimum.inside.diameter..- .ans-NPS.1/4,.3/8.in..O.D.
which.of.these.operations.would.not.breach.the.vacuum.system?.- .ans-
testing.a.system.component.with.a.leak.detector.solution
except.for.valves.in.zone.valve.boxes,.all.valves.shall.be.located.in.secured.areas.such.as.l
ocked.pipe.chases,.or.be.__________..- .ans-latched.or.locked.in.operation.position
medical.gas.Central.Supply.systems.are.NOT.permitted.to.be.located.where?.- .ans-
in.an.unlocked.location
fittings,.valves,.and.other.components.for.field-
installed.positive.pressure.distribution.systems.shall.be.________.until.prepared.for.install
ation..- .ans-delivered.sealed,.labeled,.and.kept.sealed
vacuum.piping.for.__________.shall.be.connected.separately.from.the.medical.surgical.sy
stem.directly.to.the.receiver.tank.through.its.own.isolation.valve.and.fluid.trap.located.at.the
.receiver..- .ans-a.teaching.laboratory
NFPA.99.specifies.that.the.medical.gas.piping.system.shall.be.protected.against.all.EXCE
PT.which.of.the.following?.- .ans-exposure.to.liquids
, category.1.support.gasses.carry.which.of.these.additional.hazards?.- .ans-
higher.pressures
manufactured.assemblies.for.medical.gas.systems.employing.flexible.hose.shall.use.flexib
le.connectors.with.a.minimum.burst.gauge.pressure.of.how.many.psi?.- .ans-1000
an.assembly.of.equipment.that.holds.a.capacity.of.oxygen.greater.than.____________.is.d
efined.as.a.Bulk.Oxygen.System.- .ans-20,000.ft^3
what.does.it.mean.when.equipment,.material.or.services.are.shows.as."listed"?.- .ans-
they.are.identified.and.published.by.an.organization.that.is.acceptable.to.the.authority.havi
ng.jurisdiction
under.which.of.these.conditions.shall.instrument.air.reserve.header.cylinders.be.permitted.
to.be.stored.with.the.instrument.air.compressor?.- .ans-the.only.motor-
driven.machinery.in.the.rooms.is.for.the.instrument.air.equipment.
which.type.of.copper.tube.hangers.shall.be.used.in.a.potentially.damp.location?.- .ans-
plastic.coated
stainless.tubes.may.be.joined.by.any.methods.EXCEPT.which.of.the.following?.- .ans-
Braze
gas.storage.for.Central.Supply.Systems.required.specialized.knowledge.and.consideratio
n.of.information.in.the.NFPA.55.for.locating,.installing.and.inspection.of.which.of.the.followi
ng?.- .ans-Bulk.Gas
all.pressure.relief.valves.shall.be.made.of.______.brass,.or.bronze..- .ans-stainless.steel
the.reserve.header.in.a.cryogenic.liquid.cylinder.manifold.system.shall.have.sufficient.cylin
der.connections.for.one.average.day's.supply,.but.NOT.fewer.than.how.many.connections
?.- .ans-3
all.fittings.for.medical.gas.work.shall.be.kept.separate.from.other.tools.and.kept.free.of.grea
se.or.oil..If.cleaned,.only.a.degreaser.such.as.__________.is.permitted..- .ans-
trisodium.phosphate.or.sodium.carbonate.with.potable.water
station.outlets/
inlets.shall.be.identified.as.to.the.________.for.the.specific.gas.or.vacuum.provided..- .ans-
name.or.chemical.symbol
when.brazing,.joints.shall.be.continuously.purges.with.oil-
free,.dry.nitrogen.NF.to.prevent.the.formation.of.__________.on.the.inside.surfaces.of.the.j
oint..- .ans-copper.oxide
AND ANSWERS
When.is.the.initial.pressure.test.conducted,.by.a.medical.gas.installer,.on.a.nitrous.oxide.sy
stem?.- .ans-After.blowdown.of.a.distribution.piping
In.those.portions.of.systems.intended.to.handle.oxygen.at.pressures.greater.than.350.psi.t
he.interconnecting.hose.shall.NOT.contain.________.materials?.- .ans-Polymeric
In.a.Category.1.Dental.and.Gas.Vacuum.Piping.system,.which.of.the.following.is.an.NFPA.
99.requirement.for.the.labeling.of.pipes?.- .ans-Color.coding.&.non-standard.pressure
Which.of.the.following.treatments.shall.be.performed.before.brazing.cut.ends.of.a.tube.to.b
e.installed.in.a.medical.gas.piping.system?.- .ans-
Cut.ends.shall.be.rolled.smooth.or.deburred
Manifolds.for.gas.cylinders.shall.actuate.a(an)._______.signal.and.shall.activate.an.indicat
or.at.all._______.alarm.panels.to.indicate.when.or.just.before.changeover.from.one.header
.to.the.other..- .ans-Local,.master
In.a.non-anesthetizing.area,.on.which.side.of.a.zone.valve.shall.the.pressure/
vacuum.sensor.be.located?.- .ans-Station.outlet/inlet
What.is.the.purpose.of.using.an.oxygen.analyzer.during.the.piping.purge.prior.to.brazing?.-
.ans-Assure.that.all.ambient.air.has.been.removed.from.the.pipeline
A.medical.gas.master.or.area.alarm.panel.shall.be.set.to.actuate.a(an)._____.indicator.whe
n.the.communication.with.an.alarm-initiating.device.is.disconnected..- .ans-
Audible.and.visual
When.an.EOSC.becomes.the.temporary.supply.source,.a.facility.will.monitor.the.system.by
.use.of.which.of.the.following?.- .ans-
Providing.four.connection.points.to.both.master.alarms
,Which.of.the.following.conditions.must.be.met.where.medical.gas.and.vacuum.systems.ar
e.installed.by.non-certified.personnel?.- .ans-
installation.by.anyone.other.than.6010.certified.personnel.is.NOT.permitted
Which.of.the.following.systems.shall.NOT.be.permitted.to.be.located.in.an.outdoor.enclosu
re?.- .ans-Medical.air.compressor.supply.sources
Metallic.flexible.joints.are.being.used.in.the.pipeline.for.vibration.control..Which.of.the.follo
wing.is.NOT.required.of.such.joints?.- .ans-suitable.for.service.at.150.psig.or.above
who.shall.witness.the.installer-performed.standing.vacuum.test?.- .ans-
the.authority.having.jurisdiction,.or.its.designee
the.medical.air.compressor.intake.shall.be.located.a.minimum.of.how.many.feet.from.any.e
xhaust.or.plumbing.vents?.- .ans-25.feet
the.gas.produced.by.evaporation.from.the.secondary.header.in.a.cryogenic.liquid.cylinder.
system.shall.enter.the.supply.system.________.of.the.final.line.regulator..- .ans-upstream
with.the.approval.of.the.Authority.Having.Jurisdiction,.in.which.areas.shall.the.zone.valves.
be.permitted.to.be.secured.to.prevent.inappropriate.access?.- .ans-pediatric
factory.installed.inlet.tubes.on.station.outlets.shall.be.NOT.less.than.__________with.0.3.i
nch.minimum.inside.diameter..- .ans-NPS.1/4,.3/8.in..O.D.
which.of.these.operations.would.not.breach.the.vacuum.system?.- .ans-
testing.a.system.component.with.a.leak.detector.solution
except.for.valves.in.zone.valve.boxes,.all.valves.shall.be.located.in.secured.areas.such.as.l
ocked.pipe.chases,.or.be.__________..- .ans-latched.or.locked.in.operation.position
medical.gas.Central.Supply.systems.are.NOT.permitted.to.be.located.where?.- .ans-
in.an.unlocked.location
fittings,.valves,.and.other.components.for.field-
installed.positive.pressure.distribution.systems.shall.be.________.until.prepared.for.install
ation..- .ans-delivered.sealed,.labeled,.and.kept.sealed
vacuum.piping.for.__________.shall.be.connected.separately.from.the.medical.surgical.sy
stem.directly.to.the.receiver.tank.through.its.own.isolation.valve.and.fluid.trap.located.at.the
.receiver..- .ans-a.teaching.laboratory
NFPA.99.specifies.that.the.medical.gas.piping.system.shall.be.protected.against.all.EXCE
PT.which.of.the.following?.- .ans-exposure.to.liquids
, category.1.support.gasses.carry.which.of.these.additional.hazards?.- .ans-
higher.pressures
manufactured.assemblies.for.medical.gas.systems.employing.flexible.hose.shall.use.flexib
le.connectors.with.a.minimum.burst.gauge.pressure.of.how.many.psi?.- .ans-1000
an.assembly.of.equipment.that.holds.a.capacity.of.oxygen.greater.than.____________.is.d
efined.as.a.Bulk.Oxygen.System.- .ans-20,000.ft^3
what.does.it.mean.when.equipment,.material.or.services.are.shows.as."listed"?.- .ans-
they.are.identified.and.published.by.an.organization.that.is.acceptable.to.the.authority.havi
ng.jurisdiction
under.which.of.these.conditions.shall.instrument.air.reserve.header.cylinders.be.permitted.
to.be.stored.with.the.instrument.air.compressor?.- .ans-the.only.motor-
driven.machinery.in.the.rooms.is.for.the.instrument.air.equipment.
which.type.of.copper.tube.hangers.shall.be.used.in.a.potentially.damp.location?.- .ans-
plastic.coated
stainless.tubes.may.be.joined.by.any.methods.EXCEPT.which.of.the.following?.- .ans-
Braze
gas.storage.for.Central.Supply.Systems.required.specialized.knowledge.and.consideratio
n.of.information.in.the.NFPA.55.for.locating,.installing.and.inspection.of.which.of.the.followi
ng?.- .ans-Bulk.Gas
all.pressure.relief.valves.shall.be.made.of.______.brass,.or.bronze..- .ans-stainless.steel
the.reserve.header.in.a.cryogenic.liquid.cylinder.manifold.system.shall.have.sufficient.cylin
der.connections.for.one.average.day's.supply,.but.NOT.fewer.than.how.many.connections
?.- .ans-3
all.fittings.for.medical.gas.work.shall.be.kept.separate.from.other.tools.and.kept.free.of.grea
se.or.oil..If.cleaned,.only.a.degreaser.such.as.__________.is.permitted..- .ans-
trisodium.phosphate.or.sodium.carbonate.with.potable.water
station.outlets/
inlets.shall.be.identified.as.to.the.________.for.the.specific.gas.or.vacuum.provided..- .ans-
name.or.chemical.symbol
when.brazing,.joints.shall.be.continuously.purges.with.oil-
free,.dry.nitrogen.NF.to.prevent.the.formation.of.__________.on.the.inside.surfaces.of.the.j
oint..- .ans-copper.oxide
