100 TOP MINING Engineering Interview Questions and Answers pdf Free Download

MINING Engineering Interview Questions and Answers pdf Free Download :-

1. Which cut is used for solid blasting in Indian coal Mines
c) Wedge cut

2. Permitted explosives are safe to use because
d) Special chemical are used to extinguish the spark produced during blasting.

3. Burden is the distance between
c) Distance between first row of blast holes and bench

4. Which of the following explosive have maximum strength
c) RDX

5. To measure the performance of blasting which factor is calculated
d) Powder factor

6. What is the formula for blast ability?
a) B = c / t

Where B = Blast ability c = compressive strength t = tensile strength of a rock

7 As per provision of regulation 170 (1a)(b) of CMR 1957 danger zone is an area falling a radius of ——–

d) 300m

8 While blasting in hot strata the temperature of hole should not exceed

d) 80 c

9 Fly rocks during opencast blasting is controlled by

c) muffled blasting

10 While dealing with Misfire shot the relieving hole is drilled at a distance not less than
a) 10 m
11 As per CMR the recapping of rope is done once at least in every
c) 6 months

12 what is the maximum angle of fleet is permissible in winding as per CMR

b) 1.5

13 a coal seam is said to be of degree III if rate of emission of gas in m3 /te of coal raised is

c) more than 10

14 reportable injury means any injury other than serious bodily injury, which involves the enforced absence of injured person from work for a period of

d) 72 hours or more

15 When the air and mineral flow is in same direction the ventilation is known as

a) Homotropal ventilation

16 Roof falls are more common if the face is at

b) Parallel to the main cleat

17 A seam is worked at a depth of 70 mtrs . from surface and the width of the galleries is 3.2 mtr the dimension of the pillar should not exceed

b)16.5 mtrs

18 in board and pillar panel worked in conjuction with hydraulic stowing extraction line preferred is

a) step diagonal

19 emulsion explosive is mixtur
d) ammonium nitrate, water, hollow microballons

20 Coalfication has taken place in order of

a) peat . lignite, bituminous, anthracite

21 coal seams are normally found in

a) Sedimentary rocks
22 In India a coal seam is defined as a thick coal seam if its thickness is

c)More than 4.8m

23 black damp is a mixture of

a) CO2 + N2

24 When working approaches waterlogged areas apparatus used as precautionary measure is

b) Burn side boring

25 keps are used in

d)Drum winding

26 Chasnala mine disaster is due to

c) Explosion

27 permissible dust concentration in Indian mines is

d) 5mg/m2 of air

28 Factor of safety for winding rope is
a) 10

29 Life of winding rope is

a) 4.5 years

30 Runaway switch is used in
a) Rope haulage

31 The purpose of wire gauge in flame safety lamp is

a) to prevent the passage of flame from inside to the outside of the lamp

32 the hopkalite used in CO detector is a mixture of MnO2 and

e) Silica gel

33 Self-rescuer can be used upto ________ % of CO

b) 3

34 According to CMR 1957 CH4 % in return airway should not exceed

c) 0.75%
35 the wet bulb temperature in development faces should not exceed

a) 33 C

36 In contiguous seams means the parting between two seams is within

b) 9m

37 which of the following instruments is used to measure the cooling power of the air

d) Katathermometer

38 Joining of two ropes is called as

a) Splicing

39 Clifton pulley is used in

d) Endless rope haulage

40 when shot hole is blasted at a uarry face, fracture of rock takes place by

c) Both by compression and tensile

41 The minimum accuracy of colliery triangulation survey is aimed at

a) 1 in 5000

42 fast and accurate extension of centerlines in long tunnels can be done by

c) Laser beam ranger

43 Mechanized opencast mining in India is economically feasible at present if the overburden to coal ratio is approximately up to
c) 1in 8

44 for overburden removal with shovel dumper combination the optimum size of the dumper depends on

c) Size of the shovel and the distance of haul

45 In an underground coal mine the place where explosive is stored in underground is called as

a) Reserve station

46 for heavy duty crushing on hard material the type of jaw crusher normally selected is

a) Blake type double toggle

47 To separate two finely divided solids from one another the process to be selected is

a) Floating

48 A Zn deposit is formed by a geological process is called

a) Hydrothermal

49 cut and fill stoping can be operated

c) Both underhand and overhand

50 If the RD of the ore and wall rock are low the method of stoping selected will be

c) Block caving

51 the stoping method in which maximum cost is incurred is
a) Suare set stoping

52 In the panel caving system of block caving the contact between the ore and capping is kept
b)Inclined

53 The ventilation plan of a mine should be on a reference scale o

c)2000:1

54 In any working below ground there should be provided at least two shafts or incline which should be away from each other by a minimum distance
b)13.5 mtrs

55 Poisson ratio is a relationship between
d) Longitudinal strain and lateral strain

56 RD is a uantitative index based on core recovery procedure, which is determined by incorporation of only those pieces of core that is

b) Greater than or eual to 100mm

57 In a contoured Map if there are higher values in side the loop it indicates

a) Ridge

58 The intersection of a vertical line through the observer’s station with the upper portion of the celestrial sphere is called
a) Nadir

59 the effect of curvature in leveling is an error, which is

a) Subtractive

60 The minimum accuracy of colliery triangulation survey is aimed at

a) 1in 5000

61 The earliest indication of the spontaneous heating of coal can be given by

a) Sweating of strata

62 In an underground coal mine ventilated by 100 HP fan (Air HP) it is reuired to double the uantity ofair for the purpose of air HP reuired will be

c) 800 H.P.

63 Ore for metal lead is

a) Galena

64 DGMS comes under

b) Labour Ministry

65 lily controller is used for the protection in winder

a) Over wind

66 balance rope is used on Koepe friction winder

d) To balance cage winding rope and to reduce power consumption

67Factor of safety (FOS) in connection with winding

d)applicable to static loading

68 LHD is a

d) Loading, hauling and dumping machine

69 the shape of the casting in a centrifugal pump is

a) involute

70 Magnetic separation is

a) A dry method

71 Notice to regional inspector of mines about occurrence of serious accident is given in form
a) IV A

72 Blasting Gallery method is not suitable for working seam thickness

a) Less than 7 m

73 The size and speed of rotation being the same the head developed is max in case of
d) A forward bladed centrifugal fan

74 In water gas explosion the two highly explosive gases that are involved are

a) H2 and CO

75 In an underground working area CH4 and CO2 are normally expected to be found respectively

c) Near the roof and near the floor

76 The most important parameter of a dust that governs its physiological effect is

d) Size of dust

77 In a mine a big roof fall has taken place in the mine intake place in main intake airway. The fan drift water gauge
b) Will register an increase

78 Stone dust barriers are installed in underground

a) to prevent the imitation of coal dust explosion

79 . 60 dB + 60dB

c) 63 dB

80 In ventilation network analysis, kirchhoff’s first law is used which states

b)the algebraic sum of uantitities flowing at a junction is zero

81 Atkinson’s euation P = R2 is applicable for

a) Laminar flow only

82 NVP in a mine is more in

b)Winter as the air going in is cold

83 Reynolds number varies
b) Directly with flow velocity

84 Resistance of a mine airway does not depend upon
c) uantity of air flowing in it

85 An electric cap lamp as used in mine has a fuse of capacity

d) 4 amp

86 A 10% increase in cross sectional area of a roadway will reduce the resistance approximately by
a) 10%
87 The recommended instrument for the air borne respirable dust sampling in the Indian mines is

d)NCB/MRE-113A

88 The oxygen concentration in underground mine should not be less than

c)19%

89 the thickness of ventilation stopping should not be less than

b)38 cms
90 A cap lamp must be able to produce an illumination of

a) 0.25 lumans

91 Gravimetric dust samplers works on the principals of

a) filtration

92 carbon monoxide detector tubes uses

d)Potassium palladium sulphate

93 Installation of booster fan in one district

a) Reduces the flow of air in other district

94 Pitot tube is generally used for

c) Measurement of air velocity in ducts

95 Gas chromatography utilizes the principal of

c)Solid gas absorption

96 Explosibility of coal dust generally does not depends on

d)Colour of dust

97 For measuring relative humidity we use
c)Psychrometer

98 Geothermal gradient in Indian coalfields is about

c)1 0 C / 38m

99 A drum Shearer is mounted on

a) Its own skid

100 Dust generation may be reduced by drilling

b) Sharp bit

22 thoughts on “100 TOP MINING Engineering Interview Questions and Answers pdf Free Download

    1. please send top mining engineering interview questions and answers pdf and entrance examination questions with answers for preparation JMET.

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