10-03 MSA ALTAIR 5X Muttigas Detector

Question 1

What is a bump test?

Answer 1

A daily verification of proper instrument operation by exposing the sensors to known concentrations of test gas

Question 2

What are the properties of carbon monoxide (CO)?

Answer 2

Explosive range = 12.5% – 74%

concentrations as low as 667 ppm may cause up to 50% of the bodies hemoglobin to convert to carboxy, hemoglobin, resulting in seizure, coma, and fatality

Question 3

What is the definition of a combustible gas?

Answer 3

Gas that will ignite within a sufficient and ignition source

Question 4

Where is hydrogen cyanide (HCN) found?

Answer 4

Found in products containing high amounts of nitrogen. Such as war, silk, cotton, nylon come in plastic and its polymers, foam, and melamine

Displayed as parts per million ppm

Question 5

What concentrations of HCN deadly at 10 minutes of exposure? And one minute from exposure?

Answer 5

300 ppm

3500 ppm

Question 6

What are the properties of hydrogen sulfide (H2S)?

Answer 6

Colorless, flammable, extremely toxic, gas with rotten egg odor

Heavier than air and collects in low lying areas

Displayed as parts per million ppm

Question 7

What is lower explosive limit (LEL)?

Answer 7

Lowest concentration as a percentage of a gas or vapor in the air capable of producing a flash of fire

MSA multi gas detector is set to low alarm at 10% of LEL for a wide spectrum of gases

Question 8

What are the properties of oxygen (O2)?

Answer 8

Average concentration is 20.8.

Low concentration is below 19.5% requires respiratory protection

High concentration is above 23.0% poses increased risk of fire/explosion

Question 9

What are the 5 gases monitored by the MSA Altair 5X?

Answer 9

02
CO
H2S
HCN
Combustible gas

Question 10

What are the three links of sampling hose that come with the unit?

How long should you wait for sampling when using sampling hoses?

Answer 10

3’
10’
25’

One second per foot

Question 11

What does a red LED indicate?

Answer 11

Alarm condition or error

Question 12

What does a green LED indicate?

Answer 12

Safe LED flashes once every 15 seconds to notify the user that the instrument is on an operating under conditions defined as:

Combustible reading is 0% LEL
Go to reading is 20.8%
All other Center readings are 0 ppm
No gas alarms are present
Instrument is not in low battery warning or alarm

Question 13

What does a yellow LED indicate?

Answer 13

Fault LED

Fault conditions are detected during instrument operations to include:

Instrument, memory error
Sensor determine to be missing or inoperative
Pump fault

Question 14

Call what are the alarms of the MSA multigas?

Answer 14

Vibrating alarm - unit vibrates when any alarm condition is active

Horn - audible alarm

Sensor life alarm - instrument automatically detects this condition during the turn on/calibration process. When sensor life indicator is activated an orange heart displays. When sensor has reached end of life a red heart will display until the sensor is replaced

Backlight - automatically illuminates win any front panel button is pressed

Question 15

What is the normal run time of the MSA multigas? What does the low battery warning indicate?

Answer 15

17 hours

30 minutes of operation time remaining

Question 16

How does the MSA multigas indicate a low battery?

Answer 16

Battery light indicator continuously flashes

Audible alarm sounds

Alarm LEDs flash once every minute

Safe LED no longer flashes

Question 17

How many batteries are provided to each operations company?

Answer 17

Two batteries with one always connected to a battery charger

Question 18

When should batteries be replaced on the MSA multigas?

Answer 18

After prolonged use in company operations or training

At least weekly during Saturday equipment checks

Question 19

What does the peak reading screen indicate?

Answer 19

I Slo-mo of gas recorded by the instrument since turn on or since peak readings were reset

Question 20

What does minimum readings min Screen indicate?

Answer 20

Lowest percentage level of oxygen recorded sense unit has turned on, or men reading was reset

Question 21

How is the date displayed on the MSA multigas?

Answer 21

MMM-DD-YYYY

Question 22

What does the pre-set alarm for oxygen look like?

Answer 22

Alarm indicates below, 19.5% 02

Back light turns on
Audible alarm sounds
Alarm LEDs flash
Vibrating alarm activates
Displays “ low alarm” flashing
Oxygen’s pie wedge is changed to red

Question 23

What does a high alarm for oxygen look like?

Answer 23

Indicates oxygen is above 23%

Displays “ high alarm” flashing
Oxygens’s pie wedge changes to Amber
Remains in high alarm until Buxton returns to normal range

Question 24

When the MSA multigas is in high or low alarm for oxygen, what should the operator keep in mind?

Answer 24

There may be other hazards present that are displaced in oxygen

Question 25

What are the low alarm set points?

Answer 25

LEL 10% O2 19.5% CO 35 ppm H2S 10 ppm HCN 10 ppm

Question 26

What is the high alarm set point?

Answer 26

LEL 50% O2 23.0% CO 35 ppm H2S 10 ppm HCN 10 ppm

Question 27

What is the calibration due date?

Answer 27

Appears on the display has 1 to 30 Unit requires calibration when days = 0

Question 28

What components are required for a function test?

Answer 28

One cylinder of H2S 20 ppm, CO 60 ppm, pentane (methane) 58 ppm, O2 15% One cylinder of HCN 10 ppm To demand dash flow regulators Two pieces of tubing with quick connect fittings Empty cylinders are to be forwarded to services with a form 14

Question 29

When performing a pump test which cylinder should be used first?

Answer 29

HCN

Question 30

What are some examples of places the MSA multigas can be used?

Answer 30

Fairground, overhaul operations Trench rescue operations Confined space rescue operations Carbon monoxide alarm activation Natural gas leaks Hazardous material releases Carbon dioxide, fire, suppression system, activation

Question 31

When operating an MSA multigas, what level of PPE should be worn?

Answer 31

Respiratory protection until no longer indicated

Question 32

What is the primary cause of death in confined spaces?

Answer 32

Oxygen, deficient atmosphere

Question 33

What happens when you are in an oxygen enriched or oxygen deficient atmosphere? What should responders be aware of when an oxygen deficient atmosphere?

Answer 33

Atmosphere will result in erroneous measurements of combustible gase That gases can be displaced in oxygen

Question 34

What is the second leading cause of death in confined spaces?

Answer 34

Fire and/or explosion

Question 35

How can you dilute an explosive atmosphere?

Answer 35

Through ventilation

Question 36

T/F: the toxic affects of flammable hazards can be felt before a combustible gas hazard exist?

Answer 36

T

Question 37

What are the modes of exposure for toxic materials we are most concerned with?

Answer 37

Inhalation and skin absorption

Question 38

What toxic chemicals does the MSA multigas detect? When are these gases encountered?

Answer 38

CO and HCN - overhaul H2S - confined space

Question 39

What is the process of the atmospheric monitoring?

Answer 39

Monitoring starts at the entrance to the space Place the monitor as far into the space as possible without entering Use sampling probes Allow one second per foot of tubing for a sample to detect gases Monitor a variety of heights in a space Sample around ventilation exit points Monitor the interior environment once remediation operations have begun If no changes occurring and elation, plan is in adequate or continuing a problem is contaminating the space