Nait 4Th Period Medical Gas

Front 1

What is the connection system acronym DISS

Back 1

Direct

Index

Safety

System

Front 2

How far above the floor do outlets need to be

Back 2

5ft

Front 3

What are the three components of a medical gas system

Back 3

Source of supply

A pipeline distribution system

Terminal units

Front 4

Each medical gas system is installed and tested

Back 4

Separate from one another

Front 5

Under no circumstances two systems should be

Back 5

Interconnected

Front 6

What type of material is used in medical gas systems

Back 6

Copper type L and K hard temper

Stamped MED

Front 7

Piping to be installed should have what on the ends

Back 7

Caps to prevent contamination

Front 8

What is the minimum size piping permitted

Back 8

1/2in

Front 9

How many different sized connectors and pins are there in a piping system

Back 9

6

Front 10

What is the acceptable method of joining pipe

Back 10

Brazing

Front 11

Flux is only permitted on what

Back 11

When brazing dissimilar metals

Front 12

The only material permitted to braze joints is

Back 12

Silfos (1300F)

Front 13

Prior to brazing the pipe must be purged with

Back 13

Nitrogen

Front 14

During the brazing process, a small stream of what is required to keep oxygen from re-entry

Back 14

Nitrogen

Front 15

The suggested purge rate is

Back 15

10ft3 for 1/2in pipe

15ft3 for 3/4in pipe

Front 16

What cannot be placed on threads of pipe

Back 16

Pipe dope

Teflon is the only sealing method

Front 17

Piping support for horizontal pipe 1/2 is _____ and 3/4in ____

Back 17

6ft

8ft

Front 18

Pipes must have identification a maximum of

Back 18

20ft apart between walls

Front 19

What are the background and letter colours for oxygen

Back 19

White with green letters

Front 20

What are the background and letter colours for vacuum lines

Back 20

Yellow with silver or black letters

Front 21

What is used to perform on-site cleaning of fittings or components

Back 21

Trisodium phosphate

Sodium chloride

Front 22

All tools must be free of

Back 22

Grease and oil

Front 23

What are the five tests to be performed

Back 23

Pressure

Cross connection

Concentration

Contamination

Flow

Front 24

Pressure test is performed at

Back 24

150psi or 1.5 times operating pressure

Front 25

Vacuum lines are tested at a maximum

Back 25

60psi

Front 26

If no leaks are found a ____hr test is conducted

Back 26

24hr

Front 27

Cross connection test is performed by pressurizing the line to

Back 27

50psi

Front 28

When cross connection pipe is pressurized, a gauge is then attached to what

Back 28

Each terminal unit

Front 29

The second method of cross connection testing involves

Back 29

Back purging to remove pressure test gases

Front 30

When back purging each system must have a minimum pressure differential of

Back 30

5psi

Front 31

A Concentration test is required to determine what

Back 31

That no contaminants remain in the piping system

Front 32

After proper purging the piping system should test each gas concentration. Concentration for oxygen, nitrous oxide and nitrogen should be _____%, medical air ____%

Back 32

100%

21%

Front 33

Contaminant tests are taken from a terminal unit after

Back 33

The medical gas has been allowed to travel the maximum length of piping

Front 34

All medical gas distribution systems must have

Back 34

A backup reserve supply

Front 35

The minimum allowed pressure on a vacuum line is

Back 35

16in Hg