Mine Ventilation (Actual) Exam Questions and Answers

Mine Ventilation (Actual) Exam Questions and
Answers

Mine Ventilation - ANS-The process of providing fresh air to underground mines and
removing stale or contaminated air. It is an essential safety measure in mining, as
it helps to prevent the buildup of harmful gases and dust.

Natural Ventilation - ANS-A type of ventilation by relying on the natural movement
of air, such as wind or convection currents.

Natural Ventilation - ANS-The type of ventilation in which density change in air
columns causes alteration in natural draft pressure resulting to unpredictable air
volume flow.

Natural Draft - ANS-The movement of air through a mineshaft due to the difference
in temperature between the surface and the underground workings.

Mechanical Ventilation - ANS-The type of ventilation that utilizes the application of
fans, vents, tubing's and baggings.

Mechanical Ventilation - ANS-A type of ventilation which is efficient and generally
dependable.

Pressure Differential - ANS-The cause of flow of air in a mine in which it is
established between intake and exhaust shafts or openings.

Lime Dusting - ANS-A method of controlling dust in mines by sprinkling lime on the
walls and floors. The lime reacts with the dust to form a solid layer that prevents
the dust from becoming airborne.

Quality Control - ANS-A mine ventilation control process which involves purifying air
and removing contaminants.

Quantity Control - ANS-A mine ventilation control process which involves regulating
magnitude and direction of airflow.

Temperature-Humidity Control - ANS-A mine ventilation control process which
involves controlling latent and sensible heat.

Quality control
Quantity controls
Temperature-Humidity Control - ANS-3 functions to have a total air conditioning of
the mine.

Gas control

, Dust control - ANS-Quality controls in mine ventilation

Ventilation
Auxiliary / Face ventilation
Local Rxhaust - ANS-Quantity controls in mine ventilation

Cooling
Heating
Humidification
Dehumidification - ANS-Temperature-Humidity controls

Humidification - ANS-The process of adding moisture to the air.

Dehumidification - ANS-The process of removing moisture from the air.

Psychrometrics - ANS-A branch of thermodynamics that deals with the study of
atmospheric air, which is a mixture of pure air and water vapor at atmospheric
pressure.

Colorless, Odorless, & Tasteless - ANS-Properties of air

Dry-Bulb Temperature (DBT) - ANS-The temperature of the air measured by a
standard thermometer. It is the most common way to measure the temperature of
air.

Wet-Bulb Temperature (WBT) - ANS-The lowest temperature to which air can be
cooled by the evaporation of water into the air at a constant pressure.

Dew Point - ANS-The temperature at which the air becomes saturated with water
vapor.

Vapor Pressure - ANS-The pressure exerted by the water vapor in a mixture of air
and water vapor.

Vapor Pressure - ANS-The pressure that the water vapor would exert if it were a
pure substance at the same temperature and volume.

Degree of Saturation - ANS-The ratio of the actual vapor pressure to the saturation
vapor pressure. It is a measure of how close the air is to being saturated with water
vapor.

Relative Humidity - ANS-The ratio of the amount of water vapor in the air to the
amount of water vapor that the air could hold at saturation.

Specific Humidity - ANS-The mass of water vapor per unit mass of dry air.

Enthalpy - ANS-The total heat content of the air. It is a measure of the energy in
the air.