Mine Environment MCQs Questions & Answers

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Learn and practice multiple-choice questions (MCQs) with answers related to Mine Environment. These resources are available for mining engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Mine Environment chapter is particularly important for students studying mining engineering. Page-2 section-1

Stink damp is synonymous with

A) H₂S B) CH₄ C) NO₂ D) SO₂

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

When the effect of surface temperature on natural ventilation will be less or negligible?

A) in shallow mines B) in deeper mines C) when fan size is inadequate D) when the mine size is extensive

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

In ambient air of industrial area, the permissible concentration of particulate matter less than 2.5 μm size measured on 24 hours average in μg/m³ is

A) 20 B) 40 C) 60 D) 100

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

It is the ratio of the power actually absorbed by the impeller and converted into the head of the power applied to the shaf

A) volumetric efficiency B) static efficiency C) total efficiency D) mechanical efficiency

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

The temperatures in upcast shaft & downcast shaft are 40°C & 30°C respectively. Shaft is 350 m deep. Find the height of motive column?

A) 9 B) 11 C) 13 D) 15

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

CO₂ is treated as best extinguisher for

A) class A fire B) class B fire C) class C fire D) all fires

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The nature of flow of a fluid is governed by a dimensionless parameter called

A) boundary layer B) reynolds number C) resistance co-efficients D) turbulent fluid

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Natural ventilation can be caused by

A) Auto-compression in downcast shaft B) Differences in air densities in upcast and downcast shafts C) auto-expansion in upcast shaft D) moisture content in the mine

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

During hard work e.g. shoveling, tramming, the metabolic heat rate (W m^-2) from the body surface of an average person is in the range of

A) 90 B) 150 C) 200 D) 270

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Which of the following pairs is correctly matched?

A) $$\frac{{BOD}}{{COD}} = 0$$ : Mine water is taxic B) $$\frac{{BOD}}{{COD}} \leqslant 0.2$$ : Acclimatization of seed is necessary C) $$\frac{{BOD}}{{COD}} \geqslant 0.6$$ : Mine water is non-biodegradable D) BOD = COD = 0 : Mine water is devoid of organic matter

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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Mine Environment MCQs Questions & Answers | Mining Engineering