Introduction to Mining Engineering MCQs Questions & Answers

81

Match the following for ore handling operations in an underground metal mine

Arrangement	Description
a. Draw point	1. arrangement that prevents oversized rock to pass
b. Ore pass	2. a system of vertical or near vertical openings for transferring ore from a stope to a single delivery point
c. Grizzly	3. a place where ore can be loaded and removed
d. Finger raise	4. a vertical or inclined opening used for transferring ore

A) a-4, b-3, c-2, d-1 B) a-3, b-4, c-1, d-2 C) a-2, b-4, c-1, d-3 D) a-3, b-1, c-2, d-4

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Answer & Solution

Answer: Option B

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82

Six detonators each having resistance of 1.5 ohm are connected in parallel. A 15 V exploder is connected to the detonators by two single-core cables of resistance 3 ohm each. The current in the circuit in Ampere is

A) 1.8 B) 2.4 C) 1.6 D) 3.2

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Answer & Solution

Answer: Option B

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83

What will be the overall slope of the benches shown in the figure?
Introduction to Mining Engineering mcq question image

A) 17.45° B) 18.56° C) 20.45° D) 43.55°

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Answer & Solution

Answer: Option C

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84

In gassy mine being worked by soutirage method which of the following method of blasting is preferred?

A) solid blasting B) cone blasting C) camouflage blasting D) coromant cut blasting

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Answer & Solution

Answer: Option C

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85

The rotational speed and cutting velocity of a drill are 350 rpm and 71.50 m/min respectively. The diameter of the rotary drill bit in mm is

A) 65 B) 67 C) 68 D) 70

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Answer & Solution

Answer: Option A

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86

Rocks are 'massive' when bedding planes are more than "A"m apart. A is given by

A) 0.4 m but less than 0.6 m B) 0.6 m but less than 0.8 m C) 0.8 m but less than 1.2 m D) more than 1.2 m

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Answer & Solution

Answer: Option D

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87

'Run away switch' is used in connection with

A) direct rope Haulage B) endless Haulage C) gravity Haulage D) tail rope Haulage

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Answer & Solution

Answer: Option A

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88

Which of the following credential is required for getting mining block in India?

A) 10% financial credential & 90% technical credential B) 25% financial credential & 75% technical credential C) 50% financial credential & 50% technical credential D) 75% financial credential & 25% technical credential

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Answer & Solution

Answer: Option B

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89

An opencast mine has four benches. The height, width and face angle for each bench are 13 m, 30 m and 70° respectively. The overall slope angle of the benches in degrees is

A) 25.5° B) 20.7° C) 33.4° D) 19.7°

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Answer & Solution

Answer: Option A

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90

Maximum permissible gradient for the haul road in opencast mines is

A) 12° B) 13° C) 14° D) 15°

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Answer & Solution

Answer: Option C

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Introduction to Mining Engineering MCQs Questions & Answers | Mining Engineering