Mining objective


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Mining Objective Questions Useful for Competitive Examination

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Mining objective

  1. 1. Mining EngineeringQ1. Which cut is used for solid blasting in Indian coal Mines a) Fan cut b) burn cut c) wedge cut d) drag cutQ2. Permitted explosives are safe to use because a) They have less strength b) they have low velocity of detonation c) they do not produce much noise during blasting d) special chemical are used to extinguish the spark produced during blasting.Q3. Burden is the distance between a) Two blast holes in same row b) distance between two rows c) distance between first row of blast holes and bench d) none of the aboveQ4. Which of the following explosive have maximum strength a) ANFO b) TNT c) RDX d) NitroglycerineQ5. To measure the performance of blasting which factor is calculated a) Tonnage factor b) space factor c) stripping ratio d) Powder factorQ6. What is the formula for blast ability? a) B = c / t b)B= t / c c) B = c + t d ) B = c X t Where B = Blast ability c = compressive strength t = tensile strength of arockQ7 As per provision of regulation 170 (1a)(b) of CMR 1957 danger zone is an areafalling a radius of -------- a) 100 m b) 150 m c) 200m d) 300mQ8 While blasting in hot strata the temperature of hole should not exceed a) 50 c b) 60 c c) 70 c d) 80 cQ9 Fly rocks during opencast blasting is controlled by a) Pop shooting b) Plaster shooting c) muffled blasting d) overchargingQ10 While dealing with Misfire shot the relieving hole is drilled at a distance not lessthan a) 10 m b) 20m c) 30 m d) 40 mQ11 As per CMR the recapping of rope is done once at least in every a) 3 month b) 4 months c) 6 months d) 1 year.Q12 what is the maximum angle of fleet is permissible in winding as per CMR a) 1 b) 1.5 c) 2 d) 2.5
  2. 2. Q13 a coal seam is said to be of degree III if rate of emission of gas in m3 /te of coalraised isa) is equal to 10 b) less than 10 c) more than 10 d) in between 1 to 10Q 14 reportable injury means any injury other than serious bodily injury, which involvesthe enforced absence of injured person from work for a period of a) 24 hours or more b) 36 hours or more c) 48 hours or more d) 72 hours or moreQ15 When the air and mineral flow is in same direction the ventilation is known as a) Homotropal ventilation b) antitropal ventilation c) boundary ventilation d0 natural ventilation Q16 Roof falls are more common if the face is at a) Right angles to the main cleat b) Parallel to the main cleat c) 60 degrees to the main cleat d) None of the above Q17 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 a) 15.0 mtrs b) 16.5 mtrs c) 19.5 mtrs d) 13.5 mtrsQ18 In board and pillar panel worked in conjunction with hydraulic stowing extractionline preferred isa) Step diagonalb) Diagonalc) Steep diagonald) StraightQ19 emulsion explosive is mixture of a) Ammonium nitrate, TNT, NG b) Ammonium nitrate, TNT, guar gum c) Ammonium nitrate, NG , water
  3. 3. d) Ammonium nitrate, water, hollow microballonsQ20 Coalfication has taken place in order of a) Peat. Lignite, bituminous, anthracite b) Lignite, peat, bituminous, anthracite c) Peat, lignite, anthracite, bituminous d) Bituminous, peat, anthracite, ligniteQ21 coal seams are normally found ina) Sedimentary rocksb) Igneous rocksc) Metamorphic rocksd) Any type of rocksQ22 In India a coal seam is defined as a thick coal seam if its thickness is a) 3m or more b) 3.5 m or more c) More than 4.8m d) 2.5m or moreQ23 black damp is a mixture of a) CO2 + N2 b) CH4 + CO c) CO + CO2 d) O2 + H2SQ24 When working approaches waterlogged areas apparatus used as precautionarymeasure is a) Diamond drilling b) Burn side boring c) Jackhammer drilling d) Chilled shot drillingQ25 keps are used in a) Koepe winding b) Direct haulage c) Endless haulage d) Drum winding
  4. 4. Q26 Chasnala mine disaster is due to a) Fire b) Inundation c) Explosion d) Noxious gasesQ27 permissible dust concentration in Indian mines is a) 3mg/m2of air b) 4mg/m2of air c) 3.5mg/m3 of air d) 5mg/m2 of airQ28 Factor of safety for winding rope is a) 10 b) 15 c) 5 d) 7.5Q29 Life of winding rope is a) 4.5 years b) 14 months c) 2 years d) 3.5yearsQ30 Runaway switch is used ina) Rope haulage b) Winding c) Belt conveyor d) Aerial ropewayQ31 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 b) To prevent the passage of CH4 from outside to the inside of the lamp c) To disperse the combustion gases uniformly d) For proper circulation of air currentQ32 the hopkalite used in CO detector is a mixture of MnO2 and a) Lead oxide b) Copper oxide c) NaCl
  5. 5. d) Silica gelQ33 Self-rescuer can be used upto ________ % of CO a) 2 b) 3 c) 1.5 d) 2.5Q34 According to CMR 1957 CH4 % in return airway should not exceed a) 1% b) 1.75% c) 0.75% d) 1.25%Q35 the wet bulb temperature in development faces should not exceeda) 33 Cb) 32.5 Cc) 33.5 Cd) 30 CQ36 In contiguous seams means the parting between two seams is withina) 10mb) 9mc) 15md) 20mQ37 which of the following instruments is used to measure the cooling power of the air a) Anemometer b) Velometer c) Manometer d) KatathermometerQ38 Joining of two ropes is called as a) Splicing b) Capping c) Interlocking d) Gassing
  6. 6. Q39 Clifton pulley is used in a) Direct rope haulage b) Main and tail rope haulage c) Gravity haulage d) Endless rope haulageQ40 when shot hole is blasted at a quarry face, fracture of rock takes place by a) Compression shock wave b) Reflected shock wave c) Both by compression and tensile e) By gas pressureQ41 The minimum accuracy of colliery triangulation survey is aimed at a) 1 in 5000 b) 1in 7000 c) 1in 10000 d) 1 in 15000Q42 fast and accurate extension of centerlines in long tunnels can be done by a) Miners dial b) Theodolite c) Laser beam ranger d) Strings with chalk marksQ43 Mechanized opencast mining in India is economically feasible at present if theoverburden to coal ratio is approximately upto a) 1in2 b) 1in 4 c) 1in 8 d) 1in10Q44 for overburden removal with shovel dumper combination the optimum size of thedumper depends on a) The distance of the haul b) Size of the shovel c) Size of the shovel and the distance of haul d) Tonnage to be handledQ45 In an underground coal mine the place where explosive is stored in underground iscalled as
  7. 7. a) Reserve station b) Shelter c) Magazine d) None of the aboveQ46 for heavy duty crushing on hard material the type of jaw crusher normally selected is a) Blake type double toggle b) Dodge type c) Single toggle type d) None of the aboveQ47 To separate two finely divided solids from one another the process to be selected is a) Floating b) Washing c) Jigging d) None of the aboveQ48 A Zn deposit is formed by a geological process is calleda) Hydrothermalb) magmatic separationc) supergened) None of the aboveQ49 cut and fill stoping can be operated a) Underhand only b) Overhand only c) Both underhand and overhand d) None of the aboveQ50 If the RQD of the ore and wall rock are low the method of stoping selected will bea) Shrinkageb) Sublevel cavingc) Block cavingd) Cut and fillQ51 the stoping method in which maximum cost is incurred is a) Square set stoping b) Cut and fill stoping c) Shrinkage stoping
  8. 8. d) Sublevel stopingQ52 In the panel caving system of block caving the contact between the ore and cappingis kept a) Horizontal b) Inclined c) Vertical d) None of the aboveQ53 The ventilation plan of a mine should be on a reference scale of a) 1000: 1 b) 1200: 1 c) 2000:1 d) 1500:1Q54 In any working below ground there should be provided at least two shafts or inclinewhich should be away from each other by a minimum distance a) 12.5 mtrs b) 13.5 mtrs c) 14.5 mtrs d) 15.4 mtrsQ55 Poisson ratio is a relationship between a) Longitudinal stress and lateral stress b) Longitudinal strain and lateral stress c) Longitudinal stress and internal strain d) Longitudinal strain and lateral strainQ56 RQD is a quantitative index based on core recovery procedure which is determinedby incorporation of only those pieces of core that are a) Less than or equal to 100mm b) Greater than or equal to 100mm c) Less than or equal to 125mm d) Greater than or equal to 125mmQ57 In a contoured Map if there are higher values in side the loop it indicates a) Ridge b) Valley c) Plane land d) None of the above
  9. 9. Q58 The intersection of a vertical line through the observer’s station with the upperportion of the celestrial sphere is called a) Nadir b) Ceriestrial horizon c) Zenith d) None of the aboveQ59 the effect of curvature in leveling is an error, which is a) Subtractive b) Additive c) Multiplicative d) None of the aboveQ60 The minimum accuracy of colliery triangulation survey is aimed at a) 1in 5000 b) 1in 7000 c) 1in 10000 d) 1in 15000Q61 The earliest indication of the spontaneous heating of coal can be given by a) Sweating of strata b) Make of CO2 c) Temperature rise d) None of the aboveQ62 In an underground coal mine ventilated by 100 HP fan (Air HP) it is required todouble the quantity of air for the purpose of air HP required will be a) 200 H.P b) 400 H.P c) 800 H.P. d) 600 H.P. Q63 Ore for metal lead is a) Galena b) Sphalerite c) Graphite d) PyriteQ64 DGMS comes under a) Mines Ministry
  10. 10. b) Labor Ministry c) Ministry of Coal d) Law MinistryQ65 lily controller is used for the protection in winder a) Over wind b) Over speed c) Over current d) Over loadQ66 balance rope is used on Koepe friction winder a) To increase the weight of load b) To connect cage and counter weight c) To balance winding rope d) To balance cage winding rope and to reduce power consumptionQ67Factor of safety (FOS) in connection with winding a) Assumes a constant value b) Varies with respect to time c) Applicable to dynamic loading d) Applicable to static loadingQ68 LHD is a a) Loading machine b) Hauling machine c) Dumping machine d) Loading, hauling and dumping machineQ69 the shape of the casting in a centrifugal pump is a) involute b) Circular c) Cylindrical d) ConicalQ70 Magnetic separation is a) A dry method b) An wet method c) Combination of two d) None of the above
  11. 11. Q71 Notice to regional inspector of mines about occurrence of serious accident is givenin form a) IV A b) IV B c) IV C d) IV DQ72 Blasting Gallery method is not suitable for working seam thickness a) Less than 7 m b) More than 7m c) Up to 11m d) More than 11mQ73 The size and speed of rotation being the same the head developed is max in case of a) an Arial flow fan b) a backward bladed centrifugal fan c) a radial bladed centrifugal fan d) a forward bladed centrifugal fanQ74 In water gas explosion the two highly explosive gases that are involved are a) H2 and CO b) N2 and CO c) H2 and CO2 d) O2 and COQ75 In an underground working area CH4 and CO2 are normally expected to be foundrespectively a) Near the floor and along the the roadway b) Near the floor and near the roof c) Near the roof and near the floor d) Along the roadway and near the floorQ76 The most important parameter of a dust that governs its physiological effect is a) Concentration of dust in air b) Shape of dust c) Time of exposure d) Size of dustQ77 In a mine a big roof fall has taken place in the mine intake place in main intakeairway. The fan drift water gauge a) Will remain unaffected
  12. 12. b) Will register an increase c) Will decrease d) Will increase temporarily only when fall takes placeQ78 Stone dust barriers are installed in underground a) To prevent the imitation of coal dust explosion b) To prevent imitation of firedamp explosion c) To act as the storage of stone dust d) None of the above Q79 60 dB + 60dB a) 120 dB b) 3600 dB c) 63 dB d) 36 dBQ80 In ventilation network analysis, kirchhoff’s first law is used which states a) The pressure loss in a closed mesh is zero b) The algebraic sum of quantitities flowing at a junction is zero c) The resistance of an airway varies with the square of the air velocity d) None of the above Q81 Atkinson’s equation P = RQ2 is applicable for a) Laminar flow only b) Fully turbulent flow only c) Leakage paths only d) All of the aboveQ82 NVP in a mine is more in a) Summer as the air going in is hot b) Winter as the air going in is cold c) Rainy season as the air going in is moist d) Do not vary with seasonQ83 Reynolds number variesa) Inversely with flow velocityb) Directly with flow velocityc) Directly with square of flow velocityd) Does not vary with velocity flow
  13. 13. Q 84 Resistance of a mine airway does not depend upona) Its lengthb) Its cross sectionc) Quantity of air flowing in itd) Its coefficient of frictionQ85 An electric cap lamp as used in mine has a fuse of capacity a) 1 amp b) 2 amp c) 3 amp d) 4 ampQ86 A 10% increase in cross sectional area of a roadway will reduce the resistanceapproximately by a) 10% b) 20% c) 30% d) 40%Q87 The recommended instrument for the air borne respirable dust sampling in theIndian mines is a) CLP-10 b) Konimeter c) RAM-I d) NCB/MRE-113AQ88 The oxygen concentration in underground mine should not be less than a) 20.93% b) 20% c) 19% d) 18%Q89 the thickness of ventilation stopping should not be less than a) 27 cms b) 38 cms c) 35 cms d) 47 cmsQ90 A cap lamp must be able to produce an illumination of
  14. 14. a) 0.25 lumans b) 0.25 lux c) 0.25 candlas/m2 d) 0.25 foot candlasQ91 Gravimetric dust samplers works on the principals of a) Filtration b) Thermal precipitation c) Optical d) ImpactionQ92 carbon monoxide detector tubes uses a) PETN b) Protosorb c) Hopcolite d) Potassium palladium sulphateQ93 Installation of booster fan in one district a) Reduces the flow of air in other district b) Increases the flow of air in other district c) Reduces the resistance of other district d) None of the aboveQ94 Pitot tube is generally used for a) Measurement of air velocity in mine air b) Measurement of air pressure c) Measurement of air velocity in ducts d) None of the aboveQ95 Gas chromatography utilizes the principal of a) Sonic velocity b) Refractive index c) Solid gas absorption d) OpticalQ96 Explosibility of coal dust generally does not depends on a) Fineness of dust b) Composition of dust c) Presence of methane in air d) Colour of dust
  15. 15. Q97 For measuring relative humidity we use a) Anemometer b) Velometer c) Psychrometer d) ManometerQ98 Geothermal gradient in Indian coal fields is about a) 10C/ 20m b) 10C/ 92m c) 10C/ 38m d) 10C/ 72mQ99 A drum Shearer is mounted on a) Its own skid b) Separate rail c) A.F.C. d) Support frameQ100 Dust generation may be reduced by drilling a) low RPM b) Sharp bit c) High RPM d) Low Thrust**************************************************************