CMSP Mine Ventilation & Atmospheric Monitoring 3

Question 1

Atkinson's equation (H = R × Q²) relates which three ventilation parameters?

Accepted Answer

Pressure loss, airway resistance, and airflow quantity

Answer

Humidity, resistance, and airflow rate

Answer

Heat output, rock density, and air velocity

Answer

Fan horsepower, duct diameter, and air temperature

Question 2

What is 'white damp' (also called 'carbon monoxide') and why is it particularly dangerous in mines?

Accepted Answer

Odorless, colorless carbon monoxide that impairs oxygen transport in the blood with little warning

Answer

Hydrogen sulfide gas with a strong rotten-egg odor that is easily detected

Answer

Nitrogen dioxide that causes immediate eye and lung irritation

Answer

Ammonia released from explosive residues with a sharp detectable smell

Question 3

According to MSHA regulations, what must happen to ventilation systems in an underground coal mine before blasting operations?

Accepted Answer

The area must be pre-shift examined and air quantities confirmed adequate before and after blasting

Answer

Fan speed must be reduced to prevent blasting gases from spreading

Answer

All ventilation doors must be sealed for at least 30 minutes

Answer

The main fan must be switched to forcing mode to push gases outward

Question 4

In mine ventilation design, when airways are connected in SERIES, what is the effect on total resistance?

Accepted Answer

Total resistance is the sum of individual airway resistances

Answer

Total resistance equals the resistance of the highest-resistance airway only

Answer

Total resistance decreases as more airways are added

Answer

Total resistance equals the average of all individual resistances

Question 5

What is the primary purpose of a 'line brattice' in underground mine ventilation?

Accepted Answer

To direct auxiliary ventilation air to the working face in a dead-end heading

Answer

To measure the quantity of air flowing through an entry

Answer

To seal off abandoned sections from active workings

Answer

To reduce airspeed to the required MSHA maximum velocity

Question 6

Which monitoring device provides continuous real-time detection and alarm for methane concentrations at mining equipment in underground coal mines?

Accepted Answer

Methane monitor (methanometer) with automatic power cut-off

Answer

Colorimetric detector tube

Answer

Flame safety lamp

Answer

Portable oxygen analyzer

Question 7

What is 'stinkdamp' (hydrogen sulfide, H2S) and what is the hazardous property that makes detection unreliable at high concentrations?

Accepted Answer

Olfactory fatigue causes the sense of smell to stop detecting it at dangerous concentrations

Answer

It becomes invisible at high concentrations and cannot be seen

Answer

It changes color from yellow to clear at toxic levels

Answer

It only becomes harmful after mixing with carbon dioxide