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-3 section-1

What is the relation between size of coal and total methane gas content emitted at face?

A) directly proportional B) inversely proportional C) in GP series D) in AP series

Discuss

Answer & Solution

Answer: Option B

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

What do you mean by vane efficiency?

A) the ratio of actual head to the theoretical head B) the ratio of the input head to Euler's head C) the ratio of total head to input head D) the ratio of total head developed to the velocity head

Discuss

Answer & Solution

Answer: Option B

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

The permissible value of BOD in the effluent discharge from a coal mines is

A) 120 mg/L B) 240 mg/L C) 150 mg/L D) 250 mg/L

Discuss

Answer & Solution

Answer: Option D

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

In blasting operation, generally 1 Kg of explosive liberates how much litre of CO at STP?

A) 10 B) 15 C) 20 D) 40

Discuss

Answer & Solution

Answer: Option D

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

What do you mean by gauge pressure?

A) difference between absolute pressure and atmospheric pressure B) static pressure plus velocity pressure C) barometric pressure D) absolute pressure only

Discuss

Answer & Solution

Answer: Option A

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

Which of the following test is better to carry out before cap test?

A) ignition test B) accumulation test C) loop test D) sensitivity test

Discuss

Answer & Solution

Answer: Option B

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

The BOD₅ of an effluent from a coke oven plant is 25 mg/L, and the effluent discharge is 4 ML/d. The receiving stream has a BOD₅ of 2 mg/L and the stream flow is 40 ML/d. What will be the BOD₅ in the stream just below the mixing zone?

A) 4.5 B) 5.2 C) 4.1 D) 4.8

Discuss

Answer & Solution

Answer: Option C

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

A waste water effluent has BOD₅ of 80 mg/L and the reaction rate constant is 0.16 per day. The ultimate BOD in mg/L is

A) 85 B) 100 C) 120 D) 145

Discuss

Answer & Solution

Answer: Option D

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

Precipitation of metallic ions in mine water drainage is carried out by

A) CaSO₄ and MgSO₄ B) CaCO₃ and MgCO₃ C) Ca(OH)₂ and NaOH D) CaCO₃ and MgSO₄

Discuss

Answer & Solution

Answer: Option D

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

Mine water flowing at 1.5 m³/s with 2 mg/l dissolved oxygen, joins river water flowing at 7 m³/s containing 6 mg/l dissolved oxygen. The saturated value of the dissolved oxygen in the mixture is given to be 9.3 mg/l. On the basis, the initial oxygen deficit of the mixture in mg/l is

A) 2.4 B) 4.0 C) 6.8 D) 14.6

Discuss

Answer & Solution

Answer: Option B

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

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Mine Environment MCQs Questions & Answers | Mining Engineering