Coal Mining MCQs Questions & Answers

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Each section contains 100 MCQs on Coal Mining .

The tool used in percussive drilling in very hard strata

A) 'V' Chisel B) Clay Augr C) Worm Augr D) 'X' Chisel

Discuss

Answer & Solution

Answer: Option A

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

In sand stowing incorrect profile causes

A) Cavitation B) Wear C) Pulsation D) Jamming

Discuss

Answer & Solution

Answer: Option A

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

The purpose of lining of bore hole

A) Prevent water percolation B) Easy drilling operation C) Prevent caving in of sides D) None

Discuss

Answer & Solution

Answer: Option C

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

With DERDS the diameter of the drum is of the total extracted height.

A) 20% B) 40% C) 70% D) 80%

Discuss

Answer & Solution

Answer: Option C

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

The line of extraction is best suited for hydraulic sand stowing.

A) Diagonal 60° B) Parallel C) Step diagonal D) Diagonal 30°

Discuss

Answer & Solution

Answer: Option C

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

The shape factor defined as

A) $$\frac{{{\text{Area}}}}{{{\text{Perimeter}}}}$$ B) $$\frac{{{\text{Perimeter}}}}{{{{\left( {{\text{Area}}} \right)}^{\frac{1}{2}}}}}$$ C) $$\frac{{{\text{Perimeter}}}}{{{{\left( {{\text{Area}}} \right)}^{\frac{1}{4}}}}}$$ D) $$\frac{{{\text{Perimeter}}}}{{{{\left( {{\text{Area}}} \right)}^{\frac{1}{3}}}}}$$

Discuss

Answer & Solution

Answer: Option B

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

The radio us of such excavation is equal to finished radio us of shaft, thickness of brick lining and clearence of . . . . . . . .

A) 50 - 150 mm B) 230 - 300 mm C) 300 mm above D) All these

Discuss

Answer & Solution

Answer: Option B

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

Lowering and raising of rods in percussive drilling by means of

A) Retaining key B) Stirrup C) Brace head D) Sludger

Discuss

Answer & Solution

Answer: Option A

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

Coal mining activity started in Singareni Collienies Company Limited in the year

A) 1889 B) 1879 C) 1899 D) 1869

Discuss

Answer & Solution

Answer: Option A

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

The caisson methods are

A) Sinking drum process B) Forced drop shaft method C) Triggers method D) All of these

Discuss

Answer & Solution

Answer: Option D

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

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Coal Mining MCQs Questions & Answers | Mining Engineering