Mandatory Standards & Miner Rights
What is the primary purpose of the Mine Act?
To protect the health and safety of miners.
What is MSHA’s requirement for seat belt use on mobile equipment?
Operators must wear seat belts at all times.
What is the main purpose of lockout/tagout?
To prevent unexpected energization.
How often must evacuation drills be conducted?
At least annually.
What information does an SDS provide?
Chemical hazards, PPE, handling, and emergency procedures.
How many hours of annual refresher training are required?
8 hours.
Why are blind spots especially dangerous around haul trucks?
Operators cannot see miners even with mirrors.
Who may work on energized electrical systems?
Only a qualified electrician.
Which extinguisher is used for electrical fires?
Class C.
What does PEL stand for?
Permissible Exposure Limit.
Under what condition may a miner refuse work?
When they believe a hazardous condition exists.
What is the purpose of mine traffic patterns?
To reduce collisions and confusion.
What hazard occurs when energized conductors contact grounded surfaces?
Ground faults and potential arc flash
What must miners demonstrate during SCSR training?
Proper donning and activation.
Why is respirable silica dangerous?
It can cause silicosis.
Who may accompany an MSHA inspector during an inspection?
A miner representative.
What is the minimum recommended height for dump‑point berms?
Mid‑axle height.
Why are GFCIs required in wet areas?
They detect leakage and prevent electrocution.
What does IDLH stand for?
Immediately Dangerous to Life or Health.
What must be done before using a tight‑fitting respirator?
Fit testing.
How long must training records be kept?
At least 2 years.
Why is spotting equipment dangerous?
Miners may enter blind zones or pinch points.
What must be done before servicing equipment with hydraulic systems?
Release stored hydraulic pressure.
What must be included in a mine’s emergency plan?
Escape routes, firefighting procedures, and communication methods.
What must appear on HazCom labels?
Hazard pictograms, signal words, and warnings.