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Opencast MCQ

The document consists of multiple-choice questions (MCQs) related to open cast mining, covering topics such as blasting procedures, explosive sensitivity tests, mining methods, equipment capacities, and safety measures. Each question provides options for answers, focusing on various aspects of mining operations and techniques. The document serves as a quiz or study material for individuals interested in mining practices.

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MI026 saranbabu
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649 views5 pages

Opencast MCQ

The document consists of multiple-choice questions (MCQs) related to open cast mining, covering topics such as blasting procedures, explosive sensitivity tests, mining methods, equipment capacities, and safety measures. Each question provides options for answers, focusing on various aspects of mining operations and techniques. The document serves as a quiz or study material for individuals interested in mining practices.

Uploaded by

MI026 saranbabu
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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OPEN CAST MINES MCQ QUESTION

1) Blasting is always done during


A. Working time
B. Rest internal
C. Night
D. All
Answer :

2)Which test determines the sensitivity of explosive to shock and


impact.

1) A. Rifle bullet test


2) B. Gap test
3) C. Ageing test
4) D. Water resistance test
Answer :

3) The mining method which does not distroy the land for agriculture
and residential purposes.

A. Striping
B. Open cast
C. Placer
D. Long wall
Answer :

4) The output capacity of a drag line with 23 to 30m³ is million cu.m per
year is

A. 0.25 to 0.75
B. 3 to 4.5
C. 1.5 to 1.7
D. None
Answer :

5) Yeild of coal per kg of special gelatine (60-80%) is generally in manual


quarry.

A. 8-10tx D. 16-20t

B. 10-12t
C. 12-15t
Answer : B

6) Stripper shovels are mostly deployed for

A. Coal
B. Over burden
C. Hard rock
D. Very hard rock
Answer :

7) Drifters are generally designed to drill

A. Horizontal holes
B. Inclined holes
C. Down ward holes
D. Upward holes
Answer :

8) Electric drive preferred for… machines.

A. Small
B. Medium
C. Large
D. None
Answer :

9) The bench of open cast have two elements they are…and…..

A. Floor and High wall


B. Roof and High wall
C. Roof and Floor
D. Sides and Roof
Answer :

10 ) Ensure safety in very deep open cast mine and at external dumps,
instrumentation being done to record slope stability.

A. Seismograph
B. Slope stability rador
C. Geo phone
D. None
Answer:
11) The stripping ratio for shavel dumper combination is ……..

Α. 1.5:1

B. 2:1

C. 4 to 5:1

D . 10:1

Answer :

12 ) In manual quarry the bench, height usually in hard rock.

A. 2-3m
B. 3m-4.5m
C. 4-5.5m
D. Less than 3m
Answer :

13 ) Shear needs electricity of

A. Max voltage of 6.6 KV, AC


B. Max voltage of V 1.1 KV AC
C. Max voltage of V 2.2 KV DC
D. Max voltage of V 3.3 KV AC
Answer :

14) Linear failure or plane failure is due to

A. Linear tension
B. Tension at two different directions
C. Tension at multiple direction
D. Over loading of benches

Answer:

15 ) The mining lease is granted by

A. Central government
B. State government
C. Both 1 and 2
D. Local government
Answer:
16 ) Gradients of roads in quarries for tyred vehicular traffic should not
exceed

A. 1 in 4
B. 1 in 8
C. 1 in 15
D. 1 in 10

Answer :

17) The shovel used stripping top soil and making shallow cuts and benches
upto depth of 3-6m is.

A. Dipper shovel

B. Pull shovel

C. Tractor

D. Stripper shovel

Answer:

18) The limiting gradient of surface miner.

A. 70

B. 5°

C. 3°

D. 4°

Answer:

19 ) In which mining early extraction is possible with quick return.

A. Surface mining
B. Long wall
C. Horizon
D. B.G method Okk by
Answer;
20) Where the over burden consists of soft rock which can be conveniently
removed by

A. Ripper and scraper dozer combination


B. Shovel dumper combination
C. Surface miner
D. Dragline
Answer:

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