🌬️ Ventilation
The primary purpose of ventilation underground.
What is to provide fresh air and remove contaminants?
This gas property tells you if it is heavier or lighter than air.
What is specific gravity?
LEL stands for this.
What is Lower Explosive Limit?
DPM stands for this.
What is Diesel Particulate Matter?
This naturally occurring mineral can cause silicosis when inhaled.
What is crystalline silica?
Ventilation helps control these three hazards.
What are gases, diesel emissions, and dust?
This term describes how poisonous a gas is.
What is toxicity?
UEL stands for this.
What is Upper Explosive Limit?
Approximately this percentage of DPM is carbon soot.
What is 80%?
The first dust control measure should be this.
What is water suppression?
This type of air is delivered to workers through the ventilation system.
What is fresh air?
This exposure limit represents an 8-hour average.
What is TWA-TLV?
At this concentration, a gas first becomes capable of igniting.
What is the LEL?
ASMI requires DPM testing this often for underground diesel equipment.
What is annually?
Name one activity that can generate silica dust.
What is drilling, crushing, cutting, grinding, or blasting?
If airflow stops underground, this should happen first.
What is stop work and report the issue?
This exposure level is immediately dangerous to life and health.
What is IDLH?
Above this limit, a gas mixture is too rich to burn.
What is the UEL?
Diesel engine permits are issued after reviewing these.
What are DPM test results?
This serious lung disease is caused by breathing silica dust.
What is silicosis?
Name one reason airflow direction is important.
What is keeping contaminants away from workers?
This gas property helps determine where a gas will collect underground.
What is specific gravity?
The range between LEL and UEL is known as this.
What is the explosive range?
Federal regulations control this because individual diesel exhaust components are difficult to measure.
What is the total diesel particulate matter?
Name two diseases linked to silica exposure.
What are silicosis, lung cancer, COPD, or kidney disease?