Opencast Mining MCQs Questions & Answers

Opencast Mining MCQs Questions & Answers | Mining Engineering

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

The purpose of placing the oil bottle between drill and the receiver, when drill is working.

A) Cooling B) Librication C) Remove dust D) Prevent jamming of rod in hole

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Answer & Solution

Answer: Option B

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The rotational speed of drill rods by down the hole hammer drills.

A) 0 - 10 rpm B) 10 - 14 rpm C) 30 - 40 rpm D) 15 - 25 rpm

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Answer & Solution

Answer: Option D

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Well hole drill mast length ranges from . . . . . . . .

A) 1 - 2 m B) 3 - 6 m C) 6 - 8 m D) 8 - 10 m

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Answer & Solution

Answer: Option B

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Pore water pressure affects

A) Bench height B) Pit slope C) Floor of bench D) All the above

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Answer & Solution

Answer: Option B

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The width of bench floor in mechanised quarries is usually . . . . . . . .

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

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Answer & Solution

Answer: Option B

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Rippability of the rocks can be known with the instrument.

A) Sensometer B) Refraction seismograph C) Soni meter D) Ediograph

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Answer & Solution

Answer: Option B

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The number of blows produced by down the hole hammers bits.

A) 100 - 200 per min B) 250 - 400 per min C) 500 - 2400 per min D) 2500 - 2800 per min

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Answer & Solution

Answer: Option C

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Jack hammer drills upto a depth of

A) 1.5 m B) 1.8 m C) 2 m D) 2.5 m

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Answer & Solution

Answer: Option C

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The stripping ratio for bucket wheel excavators is

A) 1.5 : 1 B) 3 to 4 : 1 C) 4 to 5 : 1 D) 8 to 10 : 1

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Answer & Solution

Answer: Option B

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Which are the explosives used in strip mining.

A) LOX B) SME C) Heavy ANFO D) SMS E) All of these

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Answer & Solution

Answer: Option E

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