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WorksheetsMedical Gas Systems 2021 101-125
Total questions: 25
Worksheet time: 25mins
Name
Class
Date
1.
While brazing medical-gas copper joints, a purge gas shall flow continuously to prevent the formation of copper oxide on the inside surface of the joint. What shall be used as a purge gas?
a)
A. oil-free, dry Nitrogen NF
b)
B. oil-less, dry Nitrogen NF
c)
C. oil-free, dry Argon MD
d)
D. any inert gas
2.
Pipe labels shall be located at a maximum interval of how many feet?
a)
A. 10 ft
b)
B. 15 ft
c)
C. 20 ft
d)
D. 25 ft
3.
Audible and visual alarm indicators shall meet which of the following requirements?
a)
A. Testing to determine indicator function should be scheduled periodically and records maintained between testing.
b)
B. The staff should be trained to operate the test button periodically and report malfunctions.
c)
C. Individual indicators shall NOT be less than DN20 size
d)
D. CGA C-7
4.
Station outlets that operate at pressures other than standard gauge pressure (50-55 psi or 160-185 psi for nitrogen), what is required of the outlet labeling?
a)
A. be covered to limit access
b)
B. be located away from other outlets
c)
C. include the operating pressure along with the name of the gas
d)
D. none of the above
5.
In compliance with NFPA 70, the new alarm wiring is being run installed underground from the initiating device at the source to a junction box located where the wiring first enters the building. NFPA 99 permits what minimum number of sets of wires to connect the initiating device with the junction box for each signal?
a)
A. 1
b)
B. 2
c)
C. 4
d)
D. 3
6.
Which of the following filler metals shall be used to braze copper-to-copper joints in medical gas/vacuum distribution piping?
a)
A. BCuP series
b)
B. BAg series
c)
C. BNi series
d)
D. BAu series
7.
NFPA 99 requires tubing to be cut square using a sharp tubing cutter that shall be free from grease, oil or other lubricants not suitable for oxygen service. What sort of treatment is permitted of the tube ends before brazing?
a)
A. May be reamed
b)
B. May be deburred or rolled smooth
c)
C. May be re-cleaned
d)
D. none of the above
8.
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.
a)
A. air analyzer
b)
B. breathalyzer
c)
C. nitrogen analyzer
d)
D. oxygen analyzer
9.
Factory installed tubes on station inlets shall be NOT less than ________ with 0.4 inch minimum inside diameter.
a)
A. 1/4 NPS
b)
B. 3/8 NPS
c)
C. 1/2 NPS
d)
D. 1/8 NPS
10.
The minimum backfilled cover for buried piping shall be 36 in., except that a minimum cover shall be reduced to ___________ where physical damage is otherwise prevented.
a)
A. 16 in
b)
B. 18 in
c)
C. 20 in
d)
D. 24 in
11.
The installation of medical gas and vacuum systems shall be made by experienced, qualified and competent installers. The installers shall meet the requirements of ___________.
a)
A. ASME Section IX
b)
B. ASSE Standard 6010
c)
C. AWS B31.3
d)
D. none of the above
12.
After completion of all installer-performed tests which of the following methods shall be used to determine that no cross-connection exists?
a)
A. Individual pressurization
b)
B. Pressure differential
c)
C. Both A and B
d)
D. Either A or B
13.
In an Emergency Oxygen Supply Connection the check valves are required to be constructed of which of the following materials?
a)
A. Brass or bronze
b)
B. Materials per the EOSC manufacturer’s recommendations
c)
C. Brass, bronze or stainless steel
d)
D. NFPA 99 does NOT establish any material requirements for these check valves
14.
Which of these is a requirement for each station inlet?
a)
A. A primary valve
b)
B. A main vacuum line
c)
C. A secondary demand valve
d)
D. A primary optional in-line
15.
Medical gas central supply systems are NOT permitted to be located where?
a)
A. Remote from the medical gas system use points
b)
B. In an unlocked location
c)
C. Outdoors
d)
D. In the same storage facility as medical gas cylinders
16.
Fittings, valves, and other components for oxygen use in a Category 1 distribution system shall be ___________ until prepared for installation.
a)
A. Kept at a minimum inventory level
b)
B. Delivered sealed, labeled, and kept sealed
c)
C. Plugged or capped by the manufacturer
d)
D. Stored in a locked room or secure facility
17.
The purpose of the NFPA 99 Code is to provide minimum requirements for the ________ for facilities, material, equipment, and appliances, including other hazards associated with the primary hazards.
a)
A. Engineering and architecture
b)
B. Maintenance and testing
c)
C. Performance and safe practices
d)
D. Both B and C
18.
The scale range of positive pressure analog indicators shall have the normal reading fall within the _________ percentage of the gauge scale.
a)
A. 1/4/2023
b)
B. 1/3/2023
c)
C. 1/2/2023
d)
D. 2/3/2023
19.
What does it mean when equipment, material, or services are shown as “listed”?
a)
A. They are identified and published by an organization that is acceptable to the authority having jurisdiction.
b)
B. They have been found tolerable for the purpose described in the manufacturer’s specifications.
c)
C. They have been tested and approved by the construction supervisor
d)
D. They have been tested by a medical gas verifier
20.
To facilitate service, testing or replacement, all pressure switches and mainline gauges downstream of the source valve shall be provided with a ________________.
a)
A. Check valve
b)
B. Shutoff valve
c)
C. Demand check fitting
d)
D. D.I.S.S. fitting
21.
Manufactured assemblies employing flexible hose shall not be labeled with ______.
a)
A. Standard pressure
b)
B. System name or symbol
c)
C. Date of installation
d)
D. Color code
22.
The accuracy of digital indicators shall be +/- ____ % of the operating pressure at which they are used.
a)
A. 2
b)
B. 4
c)
C. 5
d)
D. 1
23.
A medical gas master or area alarm panel should be set to actuate a(an) __________ indicator when the communication with an alarm-initiating device is disconnected.
a)
A. Audible
b)
B. Audible and visual
c)
C. High and low
d)
D. Visual
24.
Area alarms shall monitor _________ in the area served.
a)
A. high pressure in positive pressure medical gas lines
b)
B. low pressure in positive pressure medical gas lines
c)
C. low vacuum pressure in medical-surgical vacuum lines
d)
D. all of the above
25.
Communication devices that do not use electrical wiring for signal transmission can use _____.
a)
A. fiber optic
b)
B. wireless
c)
C. A & B
d)
D. none of the above
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