Gas Supply And Distribution week 1

Question 1

Psi

Answer 1

Pounds per square inch

Question 2

Psig

Answer 2

Pounds per square inch gauge- difference between the measured pressure and the surrounding atmospheric pressure

Question 3

Psia

Answer 3

Pounds per square inch absolute

Question 4

Nonliquefied compressed gas

Answer 4

Oxygen and air

A gas that does not liquefy at ordinary ambient temperatures regardless of the pressure applied

Question 5

Liquefied compressed gas

Answer 5

Nitrous oxide (N2O)
Gas that becomes liquid in containers at ambient temperatures and a pressure from 25-1500 psig.

Question 6

FDA

Answer 6

Purity of gases

Question 7

DOT

Answer 7

Manufacturing, marketing, labeling, filling transportation, storage, handling, etc.

Question 8

DOL & OSHA

Answer 8

Safety and health of employees

Question 9

Main safety devices on a gas cylinder

Answer 9

Pressure relieve device

Question 10

Rupture disc and fusible plug

Answer 10

Not reusable cylinders after this safety mechanism has been employed

Question 11

Pressure relief valve

Answer 11

Reusable- when the tank gets to excessive temp. Or pressure the tank will allow some gas out and the pressure will drop.

Question 12

The best way to identify a tank is by its

Answer 12

Label

Question 13

Color coding system for tanks (what colors correspond to which gas)

Answer 13

Green-oxygen
Blue-nitrous
Yellow-air

Question 14

PISS

Answer 14

Pin index safety system

Question 15

What is the position of the PISS for oxygen and nitrogen and what is its purpose?

Answer 15

2\5-oxygen
3\5-nitrogen
The PISS is for safety - so you know which gas is in the cylinder

Question 16

Most common cylinder size, the one we use most for transportation

Answer 16

Size E

Question 17

Pressure decline with a non liquified gas?

Answer 17

It is linear, as the amount of gas decreases so does the pressure in the tank

Question 18

Liquefied gas, how does the pressure in its tank drop?

Answer 18

The pressure gauge is not indicative of how much gas is in the cylinder. With N2O the gauge will continuously read 745psig until after no liquid is remaining in the tank. Once it drops below 745psig then there is no liquid in the tank, you need a new tank on stand by. The only way to know how much liquid is in the tank is to weigh it but that is not practical.

Question 19

When you open the cylinder slowly before attaching anything to blow off any debris, this is called

Answer 19

Cracking

Question 20

How many washers should you use at one time on a cylinder gas valve

Answer 20

Only one at a time

Question 21

The flow valve for that gas should be turned off before

Answer 21

The cylinder valve is opened

Question 22

Name for the gas system used in the hospital

Answer 22

Medical gas pipeline system

Question 23

What is the requirement in the hospital for supply source of gas?

Answer 23

At least an average day’s supply with a minimum of two cylinders

Question 24

Manifold

Answer 24

Multiple sources can be connected to that device

Question 25

You have a primary supply of gas and a secondary supply of gas, which one is running?

Answer 25

Primary supply is always running while the other bank is the back up

Question 26

Are the pressure reducing regulators upstream or downstream of the pressure relief valve?

Answer 26

Upstream

Question 27

Gas always flows?

Answer 27

From high pressure to low pressure

Question 28

Bank 1 Gas supply | Bank 2

Answer 28

Bank 1 is primary and bank 2 is secondary, if bank one goes below a certain pressure of is turned off for any reason then bank two starts running (back up).

Question 29

Purpose of a check valve

Answer 29

Keeps gas running in one direction, prevents back flow of gas, one way valve

Question 30

What is the most upstream think in the cylinder supply system or cryogenic oxygen supply tank

Answer 30

BANK 1 | The cryogenic oxygen supply tank

Question 31

Shut off valves how do you turn em off

Answer 31

To shut off turn towards you at a 90 degree angle

Question 32

At what times would a alarm go off in relation to the gas supply in the hospital

Answer 32

When supply reaches an average days supply when the reserve or in building supply begins to supply the system When the pressure in the main line increases or decreases from normal operating pressure

Question 33

What’s the name for the points of use from a pipeline system - refers to wall connections or hanging from ceilings

Answer 33

Terminal units

Question 34

DISS what is it

Answer 34

Diameter Index Safety System - FOR THE PIPELINE, safety connection system for pipeline system.

Question 35

What’s unique about the DISS system

Answer 35

All the connections are non interchangeable

Question 36

Why should you keep suction kinked when not in use

Answer 36

Will allow maximum vacuum to be restored quickly

Question 37

The suction system, what’s upstream and what’s downstream?

Answer 37

With suction upstream is suction | With a tank it is the most upstream