SMU-WINNING & WORKING DGMS EXAM 2021

20-04-2021
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Question Paper _ Key of DGMS SECOND CLASS UNRESTRICTED UNDER MMR - WINNING AND WORKING

1) Which method is preferred to other mining methods were ground surface is to be required to prevent from subsidence?

A) Block caving

B) Cut and fill method

C) sub level caving

D) Top slicing

E) None of these

2) Radius Rod is used for

A) Turning radius of road ways

B) Marking the shaft periphery while sinking

C) All the above

D) Mesuring the Radius of wheel

E) None of the above

3) LHD can run on

A) Ininclination upto 1 in 7

B) on stowed sand floor

C) drivage of height upto 2.5m

D) all the above

E) Hard floor

4) Hose pipe for loading the SMS/SME must have -

A) None of the above

B) all the above

C) flexible properties

D) elastic properties

E) antistatic properties

5) The chemical formula of the magnetite is?

A) Fe3O4

B) FeO

C) Fe2O3

D) Fe2O4

E) FeCO3

6) Accuracy of the sampling largely depends on

A) Grade of the ore body.

B) all the above

C) number of sample collected from the source.

D) only A & C

E) geology of the ore body

7) In hard rocks, to achieve good core recovery the drill should be run at speed and pressure

A) low, heavy

B) high, low

C) moderate, moderate

D) low, low

E) high, high

8) It is a carbonate rock which is compound of calcium carbonate (Ca CO3) & Magnesium carbonate (MgCO3) is -

A) Gypsum

B) Limestone

C) Shale

D) Magnesite

E) Dolomite

9) What is responsible for jointing of rocks?

A) Precipitation

B) Forces acting on the rock

C) Genesis

D) Genesis and various forces acting on the rock

E) all the above

10) Minerals like Orthoclase and Felspar undergo which method of chemical decomposition?

A) Reduction

B) Hydrolysis

C) Hydration

D) none of these

E) Oxidation

11) Systematic support rule is desinged based on

A) depth of deposit

B) method of extraction

C) Roof rock load density

D) all the above

E) width of gallery/drivage

12) In the Moh’s scale of hardness, the minerals in increasing sequence of hardness are

A) gypsum, topaz, calcite, diamond

B) gypsum, calcite, topaz, diamond

C) topaz, gypsum, calcite, diamond

D) calcite, gypsum, topaz, diamond

E) calcite, gypsum, diamond, topaz

13) Which explosive is blasted by safety fuse?,

A) None of these

B) NG

C) Gunpowder

D) ANFO

E) Slurry

14) Identify the fact(s) which is/are related to poor haul road on surface.

A) fuel consumption

B) life of tyre

C) all the above

D) productivity

E) only B & C

15) The resistance to stresses of rocks depend upon

A) Cohesive strength only

B) none of these

C) Cohesive strength and internal friction

D) Hardness

E) Internal friction only

16) Angle of dip is measured using which instrument?

A) none of these

B) Theodolite

C) Compass

D) Clinometer

E) Tacheometer

17) Support design in a drive is based on

A) None of these

B) life of the drive.

C) type of machinery, ventilation requirement of the connected part of the mine,

D) type of rock through which the drive has been excavated.

E) All of the above.

18) In a winz of size 2.8m x 1.8m, the density of ore is 3.2 t/m3 and the average pull blast is 1.4m, then tonnage of ore blasted/round will be -

A) 22.58

B) 20

C) none of these

D) 21

E) 22

19) The rock-mineral insoluble in water is

A) Calcite

B) Pyrite

C) none of these

D) Rock salt

E) Gypsum

20) Igneous rocks are classified as acid rocks and basic rocks on the basis of which content

A) Pyrite

B) Magnetite

C) Heamatite

D) Silica

E) Bauxite

21) Which of the following statement(s) is/are true

A) The loss of ore is more with shorter level interval

B) Short level interval is preffered if the deposit has not been proved adequately during exploration stage.

C) Only C & D

D) The loss of ore is less with shorter level interval

E) Percentage of extraction has no relation with the level interval

22) If the value of ore is Rs 600 / ton, production cost excluding overburden removal cost is Rs 400 / ton and cost of over burden removal is Rs 50 /m3, the break even stripping ratio in m3/ton is

A) 3:4

B) 1:4

C) 1:3

D) 4:1

E) 3:1

23) The delay interval betrween rows of hole should be the delay interval between the holes in a row

A) less than

B) equal to

C) more than

D) more than or equal to

E) less than or equal to

24) The streak of Pyrite is

A) Black

B) None of the above

C) Reddish

D) Cherry red

E) Yellow

25) The width of the ore body which can be economically mined is:

A) Grady width.

B) none of these

C) Assay width.

D) Actual width.

E) Stopping width.

26) Identfy the true and false statement----

a. All slope failures occures suddenly.

b. first sign of instability in slope is exhibited by the formation of tension cracks on the crest of the slope c-accelerated rate of movement in the slope leads to failure.

A) a-T, b-T, c-T

B) a-F, b-T, c-F

C) a-T, b-T, c-F

D) a-T, b-F, c-T

E) a-F, b-T, c-T

27) Identfy the true and false statement----

a. Blake jaw crusher has little tendecy to chock than Dodge Jaw crusher.

b. a 32 x 54 Jaw Crusher measures 32" from jaw die to jaw die at the top opening and 54” across the width of the two jaw dies

c. Jaw crusher is used for both primary and secondary crushing.

A) a-F, b-T, c-F

B) a-T, b-T, c-F

C) a-F, b-F, c-F

D) a-F, b-T, c-T

E) a-T, b-F, c-T

28) In respect of dipper shovel "crowding" means?

A) winging the bucket round

B) raising bucket to dumper height

C) Piercing the bucket into broken mineral

D) Leveling of floor

E) moving the shovel from one place to another

29) What should be the condition for choosing cut and fill stoping

A) economic is favourable

B) high extraction rate

C) weak H/W and F/W

D) ore body is srtong

E) all the above

30) Shorter level interval is prefered when

A) the deposite has not been proved adequately during exploration stage.

B) All of the above

C) some of the orebody has been missed during initial prospecting stage

D) None of the above

E) the deposit is irregular in dip, quality and extent

31) Shrinkage stoping is suitable for ore body having-

A) steep dip, firm ore, thickness 3-12m, comparatively strong H/W & F/W with irregular boundaries

B) Horizontal Flat dip, comparatively stable H/W & ore, ore body up to 12m thick, bedded deposit

C) None of these

D) steeply as well as mildly dip, reasonably firm ore, small as well as large ore body with irregular boundaries

E) irregular ore bodies of any shape, poor rock conditions

32) Identify the true and false statement---

a. sand only can be used for pneumatic stowing.

b. very dry material is best suitable for pneumatic stowing.

c. Of all the methods of stowing mechanical stowing is the cheapest.

A) a-F, b-F, c-F

B) a-T, b-F, c-F

C) a-T, b-F, c-T

D) a-T, b-T, c-T

E) a-F, b-F, c-T

33) Identify true and false satement

a. Blasting by tapping current from electric power lines is never practised in shaft sinking.

b. Spider in shaft sinking operation prevent undue swinging of the bucket during its travel.

c. The core recovery process in conventional drilling generally takes 75 to 90% of the total time spent on drilling.

A) a-T, b-F, c-T

B) a-F, b-F, c-F

C) a-F, b-F, c-T

D) a-T, b-F, c-F

E) a-F, b-T, c-F

34) Factors affecting slope stability are

A) slope geometry

B) only A & B

C) all the above

D) HEMM used in mining

E) method of mining

35) The charging and blasting of holes in Drop raising is based on the method of

A) cast blasting

B) None of the above

C) Vertical Crater Retreat

D) upward raising

E) delay blasting

36) Identfy the true and false statement--

a. cut and fill mining is a versatile method

b. selective mining is not feasible in cut and fill method

c. the disadvantage of shrinkage stoping is that it is a cyclic operation.

A) a-F, b-F, c-T

B) a-F, b-F, c-F

C) a-T, b-F, c-F

D) a-F, b-T, c-T

E) a-T, b-T, c-F

37) Which of the following test may be used to provide an indirect estimate of uniaxial compressive strength

A) none of these

B) displacement test

C) point load test

D) post peak test

E) servocontrolled test

38) Manual carrying of materials should not be allowed along a road or footpath having an inclination of --------------------degrees or more from the horizontal

A) 20

B) 30

C) 15

D) 25

E) 45

39) the outer layer of the Earth is called

A) None of the above

B) outer core

C) crust

D) Mantle

E) inner core

40) Match the following

a-jointed ground 1-Angled blast holes,

b-high bench height 2-faster delay interval,

c-alternate bands of hard & soft rock 3-deck charging

A) a-3, b-1, c-2

B) a-3, b-2, c-1

C) a-1, b-2, c-3

D) a-1, b-3, c-2

E) a-2, b-1, c-3

41) sand and water mixture delivery rate in stowing is 360 cubic per hour. The ratio of sand:water is 1:1.5 by volume. What is the volume sand stowed in cubic meter per hour

A) 170

B) none of the above

C) 144

D) 100

E) 120

42) Hardness of a Mineral is defined as

A) Ability to scratch other substance

B) Strength to withstand compression

C) Resistance to abrasion in its surface

D) all the above

E) only A & C

43) Inclined shaft with hoisting is prefered

A) For mining steeply inclined deposit

B) When exploration may be required during shaft shinking

C) For mining moderately inclined deposit

D) For the purposes as mentioned in both A & E

E) For achieving high production and long life

44) is the direction of extension of a deposit.

A) Apparent Dip

B) Actual Depth

C) True Dip

D) None of the above

E) Strike

45) Productivity of a highly mechanized mine depends on .

A) Manpower availability

B) % Utilisation of equipment

C) % availability of equipment

D) % availability of equipment and % Utilisation of equipment

E) % Utilisation of equipment and Manpower availability

46) Diamond drill is considered satisfactory for obtaining reliable boreholes samples because -

A) It is more safe

B) It is more efficient

C) It is cheap

D) None of these

E) It can bore a hole for a long distance & in any direction

47) If the bedded planes are separated by more than 1.2 m apart then the rocks are said to be ?

A) Rubble

B) Flaggy

C) Fractured

D) Bedded

E) Massive

48) Geological Plans & seactions show the

A) physical properties of the roks

B) mineable reserve of the mine

C) both A & B

D) distribution of rock formations and structures (e,g, faults and folds) at the Earth surface

E) physical and mechanical properties of rocks

49) Hydraulic retarder in dumper

A) prevent it's tilting while unloading.

B) None of the above

C) prevent it's speed from exceeding certain limits when travelling a steep down slope

D) limit it's speed as fixed by the manager

E) stop the vehicle if get uncontrolled

50) A fault that runs some angle between dip & strike of the bed is called -

A) Oblique fault

B) wrench fault

C) Strike fault

D) Hinge fault

E) Horst

51) The layout of a quarry should depict

A) only A & B

B) Access to the benches and exit roads for the dumpers

C) the position of overburden and mineral benches

D) all the above

E) position of back filled areas

52) The method of stoping best suited to low grade deposits of horizontal to mild dip and of thickness upto 5m is---?

A) Breast stoping

B) None of these

C) Open stoping

D) Shrinkage stoping

E) Sublevel stoping

53) The material chosen for manufacture of ampoules for stemming should be

A) All of these

B) adequately strong

C) resistant to wear by abrasion and to heat

D) antistatic

E) non inflammable

54) In soft rocks, to achieve good core necovery the drill should be run at speed and pressure

A) low, heavy

B) moderate, moderate

C) high, high

D) low, low

E) high, low

55) What is the purpose of lining the borehole?

A) To easy drilling operation,

B) To prevent water percolation

C) To prevent caving of sides

D) None of the above

E) For having finished walls of borehole

56) Identfy the true and false statement---

a. process of blending is desirable to achieve a constant feed comming to the process plant.

b. any measure taken to improve transport operation in the mine will substantially improve the economy of the mine. c.overall quality of ore available to the consumers may be affected in earlier phase of opencast mining.

A) a-T, b-T, c-F

B) a-T, b-F, c-T

C) a-T, b-T, c-T

D) a-F, b-T, c-F

E) a-F, b-T, c-T

57) Most prominent Disadvantage of Compartment raising is

A) consumtion of large quantities of timber and sluggish ventilation

B) Top end of the raise has to be travelled through temporary ladder.

C) frequent repairing of the platform.

D) Labour intensive.

E) None of these

58) Identfy the true and false statement---

a. shovel having dipper stick attachment to the bucket instead of cables is more suitable for hard digging.

b. Laminated and stratified rocks upto hardness 7 (seven) on Moh's scale are suitable for ripping by a ripper.

c. disadvantage of high bench may include high over break

A) a-T, b-F, c-F

B) a-F, b-F, c-F

C) a-T, b-F, c-T

D) a-T, b-T, c-T

E) a-F, b-F, c-T

59) Calculate the yield of drill machine per meter in tone from the following data : Dia of hole - 115 mm Type of magterial - Lime stone (S.G.-2.5) Burden and spacing - 3 m & 3 m

A) 22.5

B) 30.5

C) 40.5

D) 35.5

E) 26.5

60) It is an advantage to have levels at short intervals if

A) the deposit has not been proved adequately during exploration stage

B) the deposit is irregular in dip, quality and extent

C) the ore body is thin

D) Only A, C & D

E) some of the ore body has been missed during initial prospecting stage

61) Rserve staion is a place for

A) place for rescue

B) fresh air base

C) temproary rest shelter

D) place for temproary storage of exlposive

E) none of these

62) The streak of Magnetite is

A) Reddish

B) Metallic

C) Cherry red

D) None of the above

E) Black

63) Drilling and charging parameters as follows. Bench height is 10m, burden-4m, spacing-5m, blast hole diameter- 150mm, explosive per hole-120kg , density of rock -3000kg/cubic meter. The powder factor in tonne per kg is............

A) 4.5

B) 5

C) 6

D) 5.5

E) None of the above

64) Identfy the true and false statement----

a. Shrinkage stoping is applicable in comparatively stable hanging and foot wall.

b. shrinkage stoping is safer than sub level stoping.

c. the disadvantage of shrinkage stoping is that it is a cyclic operation.

A) a-F, b-F, c-F

B) a-F, b-F, c-T

C) a-T, b-T, c-T

D) a-T, b-F, c-T

E) a-T, b-F, c-F

65) Arrange the designated hole sizes in diamond drilling in increasing order of hole diamter -

A) NX, EX, BX, AX

B) AX, BX, EX, NX

C) NX, AX, BX, EX

D) EX, AX, BX, NX

66) Knowledge of Gelogy is important for mining because

A) only A & C

B) it helps in search of mineral deposits

C) it helps in evalute possible mining sites

D) it guides mine engineers on the best way to develop the mine over time.

E) All the above

67) Dilution is best controlled in

A) both A & B

B) both B & C

C) Block Caving

D) Cut & Fill stoping

E) Sub level stoping

68) Placer mining is suitable for

A) Precious metals

B) both C & D

C) Salt

D) Gemstones

E) Coal

69) Match the following

a-hard and brittle ground 1-faster delay interval,

b-delay in detonation 2-control ground vibration,

c-large diameter blast holes 3-drilling & blasting is more economical

A) a-3, b-2, c-1

B) a-2, b-1, c-3

C) a-3, b-1, c-2

D) a-1, b-3, c-2

E) a-1, b-2, c-3

70) Level interval in an underground mine is decided based the following factors

A) life of each level.

B) None of these

C) mine ventilation system.

D) all of the above

71) Developement of the mine

A) only A & C

B) Enables mine planners to decide upon the method of stopping

C) enables one to know the quality of mineral and extent as well as shape, thickness and dip of ore body, nature of country rock, strength of ore and wall rocks, nature and extent of overburden etc.

D) Provide access and transport facilities for men, material and the excaveted minerals.

E) all A & B & C

72) The bench height is 6m, depth of the hole is 6.6 m (includes sub grade drilling), spacing is 4 m, burden is 5 m, the density of the rock is 2, and explosive used is 24kg. Find the powder factor.

A) 12

B) 11

C) 10

D) None

E) 24

73) Which of the following is used in manufacture of Sorel cement?

A) Quartzite

B) None of these

C) Magnesium

D) Dolomite

E) Fly ash

74) The only producer of diamond in India is

A) Rajasthan

B) None of these

C) Bihar

D) Madhya Pradesh

E) Orissa

75) Developement operations in a mine leasehold is started

A) all the above

B) When the mineral is economic

C) When the mineral is economic and fund is available with mine management

D) when there is proved ore deposit

E) if the feasiblity report promises mining of the mineral deposits a safe and practical proposition with a reasonable return on the investment.

76) Rock burst events can be facilitated by

A) only A & C

B) high stress concentrations

C) rapid energy release during roof breakage

D) all the above

E) significant accumulation of strain energy in the rock mass

77) Least ground movement is possible in

A) Sub level stoping

B) Top sclicing

C) Room & Pillar stoping

D) Block Caving

E) Cut & Fill stoping

78) Identfy the true and false statement---

a. cost of removing overburedn goes up as the quarrying operation extend to the dip side of the property.

b. Safety Management Plan of a mine needs to be reviewed before deploying new combination of HEMM for overburden removal.

c. break even stripping ratio is constant and cant change.

A) a-T, b-F, c-T

B) a-T, b-F, c-F

C) a-F, b-F, c-T

D) a-T, b-T, c-F

E) a-T, b-T, c-T

79) What is/are the important objective(s) of any blasting program

A) to control blast induced ground vibration

B) Improved fill factor

C) All of above

D) Ensuring the safety of men and machine in and around the blast site

E) good fragmentation

80) For industrial building (RCC & framed structures),not belonging to owner of mine, the PPV on the ground adjacent to structures at dominant excitation frequency <8Hz, shall not exceed mm/sec

A) 10

B) 25

C) 5

81) Fill in the blanks.

Rocks are called massive when bedding planes in them are more than apart, bedded when between , and flaggy when less than .

A) 1.2m, 50mm & 1.2m and 50mm respectively.

B) 3m, 50mm & 3m and 50mm respectively.

C) 2m, 75mm & 2m and 75mm respectively.

D) 1.2m, 75mm & 1.2m and 75mm respectively.

E) 1m, 75mm & 1m and 75mm respectively.

82) Fold in which the limbs lie exactly one over another

A) Isoclinal

B) Asymmetrical

C) none of these

D) Recumbent

E) Symmetrical

83) Which of the following(s) is/are not strata monitoring instruments

A) none of these

B) Multi point bore hole extensometer

C) tape extensometer

D) stress cell

E) Tell tale

84) Which of the fact(s) regarding sublevel caving is/are true

A) developement, production drilling and loading are carried out in separate levels, continuously and independently of each other.

B) the stopes are easy to ventilate

C) it is suitable for a high degree of mechanisation

D) only A & B

E) only A & C

85) Gabro is ?

A) Metamorphic Rock

B) None of the above

C) Carbonate Rock

86) Which of the follwoing instrument(s) are used for measuring bore hole deviation

A) tropari instrument

B) only A & C

C) clinometer compass

D) carlson compass

E) only A & B

87) Foliation is a primary structure of which type of rock?

A) Igneous rock

B) Metamorphic rock

C) none of these

D) Sedimentary rock

E) Not associated with any rock

88) Identfy the true and false statement---

a. open pit lay out with two trenches, one for OB and one for mineral, is suitable if the mineral is at much depth

b. a spiral layout is an advantage in hill top deposit.

c. the layout of a quarry also depends on the surface topography.

A) a-F, b-T, c-T

B) a-F, b-T, c-F

C) a-T, b-T, c-T

D) a-F, b-F, c-T

E) a-T, b-T, c-F

89) Which statement(s) about Mineral is/are true

A) streak shows the true colouer of the mineral

B) only A & B

C) streak is the colour of mineral in powdered form

D) In large solid form, trace minerals can change the colour apperance of a mineral by reflecting the light in a certain way

E) all the above

90) Which of the following mineral has white streak ?

A) Calcite

B) Chalk

C) only A & B

D) Quartz

E) all the above

91) Identfy the true and false statement----

a. The objective of slope monitoring is to detect any instability well in advance

b. If the failure in the slope is unavoidable then it can be brought down in a predictable mannare

c. If the instability in slope is detected at a later stage then it will be easy to check the instability.

A) a-F, b-F, c-T

B) a-T, b-F, c-F

C) a-T, b-T, c-F

D) a-T, b-T, c-T

E) a-T, b-F, c-T

92) Match the following

A. drop raising 1-Large diameter blast hole,

B. delay in detonation 2-control ground vibration,

C. drilling & bvlasting is more economical 3-Spherical chrge

A) a-3, b-1, c-2

B) a-1, b-2, c-3

C) a-3, b-2, c-1

D) a-2, b-3, c-1

E) a-1, b-3, c-2

93) Which method(s) is/are consideared a form of overhand stoping ?

A) Shrinkage Stoping

B) Rill stoping

C) only B & C

D) Sublevel Stoping

E) only A & B

94) Cementation method is carried out for shaft sinking to achieve -

A) to reduce the inflow of ground water

B) to avoin flooding

C) to avoid sand boiling

D) all of these

E) to stabilize the collapsing ground

95) Which of the following(s) is/are true about mineral

A) All- A, B & C

B) it is homogenous

C) it is naturally occuring, solid crystalline substance

D) it has a specific chemical composition

E) Only A & B

96) For important haul roads the minimum factor of safety of the slope is?

A) 1

B) None of these

C) 2

D) 2.5

E) 1.5

97) Identify true and false satement

a. All core size drilling is possible with wire line coring equipment.

b. Wire line coring equipment is used for drilling hole of AX and EX size only c.Rock roller bits used for rotary drilling provide cores of the strata passed through.

A) a-F, b-T, c-F

B) a-F, b-F, c-T

C) a-T, b-F, c-F

D) a-T, b-F, c-T

E) a-F, b-F, c-F

98) Which of the following(s) is/are naturally floatable

A) pyrite

B) Iron Ore

C) galena

D) limestone

E) both pyrite and galena

99) Which of the following is not true about Anticline?

A) The strata are uparched

B) They are convex downwards

C) The limbs dip away from each other at the crest

D) They are convex upwards

E) Geologically older rocks occupy a position in the interior of the fold

100) Circular Shaft is more prefered because

A) once development deepens, a circular design becomes advantageous

B) all the above

C) The circular nature of the design provides redistribution around the excavation due to the lateral pressures exhibited by the host rock

D) Most mechanized equipment used in shaft sinking is more suited to a round shape

E) only A & B

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