MOAR GAS
What is the relative weight of a gas mean?
How heavy the gas is when measured against normal air. Lets you know if it will sink or float.
This gas has a relative weight of .97 so it floats up, can be found as a byproduct of fire, and can also be dangerous at home so you should have a specific detector for it in your house.
Carbon Monoxide
Our Drager SR30's help protect us against which gasses?
All of them- As the Drager SR30 provides you with fresh air for escape.
This is the main value vs the W65 (only protected against CO)
Where would smoke travel first if a unit caught on fire on the ramp just above the 2050 level?
Vent pushes from bottom to top.
The smoke would travel upwards first from there.
Your safest place of refuge is 2050 refuge or below at 1950 minearc.
If you hear a CODE 1 called for a MEDICAL EMERGENCY. Do you need to go to a refuge station?
NO
Just get off the ramp at the closest location to get out of the way of the ERT ambulance and remain there until the All-Clear is given by security over the radio.
What is a TLV?
TLV=Threshold Limit Value
The concentration of gas below the TLV is the amount of gas you can be exposed to without suffering from any irreversible effects.
What is the lower level limit of O2 that the WSCC sets for all mines in the NT/NU?
19.5%
How long will your Drager SR30 last once it has been started?
30 minutes
How long would a typical 20lb fire extinguisher last you? (in seconds)
20-25 seconds
If there is a CODE 1 at the shop on surface...do you need to stop working underground/other locations?
YES
We have a small team that can only deal with 1 emergency situation at a time. ALL work stops.
Kitchen
Warehouse
Underground
Sort Rows
Misery Road Travel
TWA-stands for what?
This is the concentration of a gas that you can be exposed to for a total of 8hrs a day without injurious effects.
This gas is most commonly found as a byproduct of explosives and on surface can look like a reddish brown cloud over a pit when its cold outside with no wind.
It is also heavy at 2.62ppm and requires ventilation to help push it out of our mine post blast.
NO2
How long will an Ocenco last you if you turn the bottle on full blast and leave it at full blast?
90 minutes
But the Ocenco can be bled down slower to last up to 8 hours if you are at rest and you are carefully controlling your breathing and how much O2 is slowly released from the bottle.
How many locations are there to set off your suppression system on your underground vehicle?
2
1 inside the cab
1 outside the cab
You should always be familiar with where each is in case you need to use it.
What channel are all CODE 1's called on across our entire site as well as underground?
Channel 4
CODE 1-CODE 1-CODE 1
Type of emergency
Exact location
Any relevant details
What is a gasses ceiling mean (C)?
If you exceed the ceiling limit of a gas you are in an IDHL (Immediately Dangerous to Health and Life) atmosphere and will not survive.
Why are you not allowed to wear OV (Organic Vapour) cartridges on a half mask or full mask underground in a mine?
They filter out stench gas smell resulting in you not knowing there may be an emergency requiring you to go to a refuge station.
What do you do if you inspect your SR30 and find that the brown O-Ring in the sight glass has turned bright green or there is a bunch of sandy debris in the window?
Bring it to Safety as it is no longer safe for use and needs to be taken out of service immediately so no one else can accidentally take it.
What type of fire classes can a fire extinguisher / suppression system fight against?
A - B - C
Not D= flammable metals (like magnesium)
Not K= kitchen grease fires
How do you call a Code-1 from a camp phone?
Dial 4-4-4-4
What is the relative weight of normal air (that all gases are compared against)?
1.0
Why are gas engines not allowed underground?
-Extremely flammable
-Create big explosive vapor clouds
-Combust easily
-Dangerous fume off-gassing
Is it a good idea to pass by a refuge station you would rather not be at to get to one thats bigger or to surface?
NO
You can end up:
- Running out of self rescue air
- Finding your route blocked
- Losing your way in smoke
Always use the closest refuge station to you...even if Sully is in there with you.
When you're using a fire extinguisher against a fire...do you stand up wind or down wind of the fire?
UP WIND
If you stand down wind...you're going down.
Smoke will travel down wind along with all the gas from the fire.
If you smell stench at any time ever...what do you do?
Stop work immedaitely
Head to nearest refuge station
Wait until the all clear is given over radio before exiting