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Question 1
A vertical downcast shaft has a collar elevation at surface where barometric pressure is 85.0 kPa. If the shaft depth is 2 000 m and the mean air density down the shaft is 1.15 kg/m³, what is the barometric pressure at the shaft bottom? (Assume g = 9.81 m/s²)
Correct Answer:
107.56 kPa
Question 2
In mine psychrometrics, why is Sigma Heat Content (S) preferred over total enthalpy (h) when analyzing adiabatic moisture exchange along mine airways?
Correct Answer:
Sigma heat content remains strictly constant during pure sensible and latent heat exchanges where liquid water evaporates at the wet-bulb temperature
Question 3
Calculate the density of dry mine air at a barometric pressure of 100.0 kPa and a dry-bulb temperature of 27.0 °C (300.15 K). Take the gas constant for dry air as R = 287.05 J/(kg·K).
Correct Answer:
1.161 kg/m³
Question 4
A deep gold mine has a downcast shaft with a mean air density of 1.22 kg/m³ and an upcast shaft with a mean air density of 1.10 kg/m³. If the vertical shaft depth is 1 800 m, calculate the Natural Ventilation Pressure (NVP) generated by the density difference. (g = 9.81 m/s²)
Correct Answer:
2 118.96 Pa
Question 5
According to the Atkinson equation for square-law fluid flow in mine airways (H_f = R · Q²), what happens to the frictional pressure drop (H_f) if the airflow quantity (Q) through the airway is doubled?
Correct Answer:
Frictional pressure drop increases by a factor of 4
Question 1
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About this Exam

Prepare with the Certificate in Mine Environmental Control Exam Practice Questions - Certificate in Mine Environmental Control (South Africa) Exam practice quiz. This question bank includes 100 questions covering pressure, shaft, mine, heat, and calculate. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Certificate in Mine Environmental Control Exam Practice Questions - Certificate in Mine Environmental Control (South Africa) Exam

This practice set contains 100 questions from the matching question bank and focuses on pressure, shaft, mine, heat, and calculate. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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