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    Details

    • Home
    • FIRST/SECOND CLASS
    • COAL FMC/SMC EXAM PAPERS
    • 2021
    • SCU- MINING MACHINERY DGMS EXAM-2021

    SCU- MINING MACHINERY DGMS EXAM-2021

    • 24-04-2021
    • 4967
    • 0

    Question Paper _ Key of DGMS SECOND CLASS UNRESTRICTED UNDER CMR - MINING MACHINERY

    1)      The insulation of modern EHV lines is designed based on

    A)      corona

    B)      all of the above

    C)      switching voltage

    D)     the lightning voltage

    E)      radio interference

     

    2)      The power stated on the name plate of any motor is always

    A)      the output power at the shaft

    B)      the gross power

    C)      the power drawn in kVA

    D)     the power drawn in kW

    E)      Both (A) and (C)

     

    3)      Keps are used in which type of winding system

    A)      Friction winder

    B)      Direct haulage

    C)      Koepe winding

    D)     Drum winding

    E)      Endless haulage

     

    4)      The process of chamfering the entrance of a drilled hole is known as          

    A)      none

    B)      counter-sinking

    C)      counter-fillet

    D)     trepanning

    E)      counter-boring

     

    5)      Minimum duration for examination of travelling roadways,(In days)

    A)      14

    B)      7

    C)      5

    D)     21

    E)      2

     

    6)      The utilization voltages used in below ground coal mines are:

    A)      240 V

    B)      550 V

    C)      All of the above

    D)     125 V

    E)      1100 V

     

    7)      Another name for double belt conveyor is

    A)      Trunk belt Conveyor with loop take up arrangement

    B)      Rectangular riffles Conveyor

    C)      Sandwich Conveyor

    D)     Trunk belt Conveyor

    E)      Herringbone riffles Conveyor

     

    8)      The value of the universal gas constant in kJ/kmol K is

    A)      6.314

    B)      9.314

    C)      7.314

    D)     8.314

    E)      10.314

     

    10)    Discharge capacity of the reciprocating pump is         that of the centrifugal pump

    A)      same as

    B)      higher than

    C)      unpredictable

    D)     lower than

    E)      all the above

     

    11)    MCCB stands for:

    A)      Miniature Current Circuit Breaker

    B)      Maximum Current Circuit Breaker

    C)      Maximum Case Circuit Breaker

    D)     Moulded Case Circuit Breaker

    E)      Moulded Cabinet Circuit Breaker

     

    12)    Name the method of artificial respiratory resuscitation injury/burns in chest or belly?

    A)      None of the above

    B)      Resuscitation under cardiac arrest

    C)      Mouth to mouth method

    D)     Holgen-Nelson method

    E)      Schafer's method

     

    13)    Starting by a centrifugal or turbine pump must require

    A)      Priming

    B)      Opening of valve

    C)      Snoring

    D)     Reciprocating

    E)      Jigging

     

    14)    The full form of ERTL is:

    A)      Electronics report and test laboratory

    B)      Electronics review and test laboratory

    C)      Electrical research and test laboratory

    D)     Electronics research and test laboratory

    E)      None of the above

     

    15)    The rupturing capacity of circuit breakers expressed in:

    A)      kilo ampere(kA)

    B)      kilo volt ampere(kVA)

    C)      volt ampere(VA)

    D)     mega volt ampere (MVA)

    E)      mega ampere(MA)

     

    16)    The appropriate rate equation for convective heat transfer between a surface and adjacent fluid is prescribed by

    A)      None of these

    B)      Newton’s first law

    C)      Wein’s displacement law

    D)     Newton’s law of cooling

    E)      Kirchhoff’s law

     

    17)    The dielectric strength of air under normal conditions is around

    A)      150 kv/cm

    B)      100 kv/cm

    C)      250 kv/cm

    D)     30 kv/cm

    E)      200 kv/cm

     

    19)    If two moving elements have surface contact in motion,such pair said to be

    A)      surface pair

    B)      lower pair

    C)      sliding pair

    D)     higher pair

    E)      rolling pair

     

    20)    The unit of eletric energy is

    A)      Volt-Ampere

    B)      kWhr

    C)      kVA

    D)     joule-second

    E)      Watt

     

    21)    Special types of idlers to absorb shock at loading points are called

    A)      Return idlers

    B)      None of the above

    C)      Impact idlers

    D)     Actuating idlers

    E)      Carrying idlers

     

    22)    A heat engine converts heat energy from fuel combustion or any other source into which type of work

    A)      pressure work

    B)      none of the above

    C)      dynamic work

    D)     Mechanical work

    E)      Electrical work

     

    23)    One kg of steam sample contains 0.8 kg dry steam. Its dryness fraction is

    A)      0.5

    B)      1

    C)      0.8

    D)     0.6

    E)      0.2

     

    24)    Continuous miner operates at

    A)      1100 V

    B)      550 V

    C)      3300 V

    D)     6600 V

    E)      none of these

     

    25)    The principle of working of a transformer is:

    A)      mutual induction

    B)      static induction

    C)      Both (A) and (C)

    D)     self induction

    E)      dynamic induction

     

    26)    Transmitting signal should be provided for haulage roadway if length is more than (In Mtr)

    A)      20

    B)      40

    C)      30

    D)     10

    E)      15

     

    27)    The volute pumps and vortex volute pumps are          pumps with   shaft

    A)      multistage, horizontal

    B)      none of the above

    C)      single stage, vertical

    D)     multistage, verical

    E)      single stage, horizontal

     

    28)    Pressure welding or plastic welding consists of

    A)      none of the above

    B)      resistance welding

    C)      Spot welding

    D)     all the above

    E)      thermit welding

     

    29)    In order to reduce hysteresis losses, the cores of electrical machines are generally made of:

    A)      cast iron

    B)      high carbon steel

    C)      silicon steel

    D)     tungsten steel

    E)      low carbon steel

     

    30)    Trough shape of the belt conveyor is made with the help of

    A)      Bottom roller set

    B)      Idler set

    C)      Snub pulley

    D)     Drive roller set

    E)      None of the above

     

    31)    The formula to find I when the values of V and R are known is:

    A)      I=VR

    B)      None of the above

    C)      V=I/R

    D)     I=R/V

    E)      I=V/R

     

    32)    Which of these is a type of reciprocating steam engine

    A)      compound

    B)      none

    C)      all of the above

    D)     unflow

    E)      simple

     

    33)    The pump discharge can not be measured by

    A)      Orifice meter

    B)      All of the above

    C)      Triangular Notch

    D)     Manometer

    E)      Rectangular Notch

     

    34)    Elastic limit is the point

    A)      where strain is not dependent on stress

    B)      up to which stress is proportional to strain

    C)      At which elongation takes place without application of additional load

    D)     Up to which if the load is removed, original volume and shapes are not regained

    E)      Up to which if the load is removed, original volume and shapes are regained

     

    35)    The lighting provided in a mine shall, as far as possible, be so arranged as to prevent 

    A)      Over voltage

    B)      Glare

    C)      Over load

    D)     all of the above

    E)      None of the above

     

    36)    Telephonic communication should be provided U/G haulage roadway if length is more than ( In Mtr)

    A)      100

    B)      200

    C)      250

    D)     150

    E)      300

     

    37)    Funtion of the pull cord in the belt conveyor system is

    A)      slowing device

    B)      scrapping device

    C)      stopping device

    D)     signalling device

    E)      Cleaning device

     

    38)    Which point on the stress strain curve occur after proportionality limit?

    A)      Upper yield point

    B)      Lower yield point

    C)      Torsion limit

    D)     Ultimate point

    E)      Elastic limit

     

    39)    A step-up transformer increase

    A)      voltage

    B)      power

    C)      resistance

    D)     current

    E)      frequency

     41)    The stress which acts in a direction perpendicular to the area is called

    A)      None of these

    B)      Bending stress

    C)      Normal stress

    D)     Thermal stress

    E)      shear stress

     

    42)    Lancashire boiler is of

    A)      all of the above

    B)      stationary fire tube type

    C)      natural circulation type

    D)     internally fired type

    E)      horizontal type

     

    43)    The meter used for measuring current of an electrical circuit is called

    A)      potentiometer

    B)      ammeter

    C)      Multimeter

    D)     voltmeter

    E)      ohm meter

     

    44)    Which feature is not found in Universal Drilling Machine

    A)      It can drill blast holes

    B)      None of the above

    C)      It is crawler mounted

    D)     All of the above

    E)      It can drill in any direction

     

    45)    Tractive force is dependent

    A)      none of these

    B)      both of these

    C)      wt of the track

    D)     on the wt of the m/c

    E)      on the weight of machine & also frictional adhesion between wheel and track

     

    46)    Examination of brakes of the winding engine should be done( In hours)

    A)      16

    B)      8

    C)      20

    D)     12

    E)      24

     

    47)    Overman's certificate (restricted) reqd as per CMR, 2017, Regulation no.

    A)      247(1)

    B)      247(4)

    C)      247(3)

    D)     247 (5)

    E)      247(2)

     

    48)    The main function of economiser of a boiler plant is to

    A)      increase life of boiler

    B)      increase steam pressure

    C)      increase steam production

    D)     all of the above

    E)      reduce fuel consumption

     

    49)    Which type of fire extinguisher must NOT be used for electrical base fire?

    A)      Foam extinguisher

    B)      Halon extinguisher

    C)      Dry powder extinguisher

    D)     None of the above

    E)      Carbon tetra chloride(CTC) extinguisher

     

    50)    The material used for bus-bars should have

    A)      high softening temperature

    B)      low cost

    C)      all of the above

    D)     low resistivity

    E)      high resistivity

     

    51)    Motor overheating is caused by which of the following faults?

    A)      all of the above

    B)      Shorted windings

    C)      Overloads

    D)     Worn or dry bearings

    E)      None of the above

     

    52)    Distribution transformers are designed to have maximum efficiency nearly

    A)      at full load

    B)      at no load

    C)      at 50% of F.L.

    D)     all of the above

    E)      None of the above

     

    53)    The water accumulated in the steam pipe line connected from the boiler to the windng engine can be removed by installing

    A)      L- Bend at the end of the pipe line

    B)      a pressure reducing valve

    C)      all the above

    D)     a flow meter

    E)      a U-type steam trap

     

    54)    The transformer oil used in transformers provide:

    A)      cooling only

    B)      insulation, cooling and lubrication

    C)      insulation and cooling

    D)     cooling and lubrication

    E)      insulation and lubrication

     

    55)    The equipment used to convert D.C. into A.C. is called:

    A)      a generator

    B)      a regulator

    C)      a converter

    D)     a rectifier

    E)      an inverter

     

    56)    When speed of an alternator is changed from 3600 R.P.M. to 1800 R.P.M., the generated e.m.f. per phase will become

    A)      twice

    B)      three times

    C)      one-fourth

    D)     one-half

    E)      four times

     

    57)    At the time of charging a lead acid battery which one of the harmful gas evolute?

    A)      Carbon dioxide

    B)      Hydrogen

    C)      Methane

    D)     Nitrogen

    E)      Oxygen

     

    58)    The automatic contrivances in winding engines are

    A)      over winding

    B)      None of the above

    C)      Any of (A) and (B)

    D)     both (A) and (B)

    E)      over speeding

     

    59)    The number of turns of the rope required on the drum when the cage or other means of conveyance is al its lowest working point in the shaft.

    A)      should be two

    B)      not required

    C)      at least 2

    D)     at least one

    E)      at least 3

     

    60)    What is the maximum permissible width of manholes provided in the haulage roadway?

    A)      1.2 metre

    B)      1.5 metre

    C)      1.0metre

    D)     0.8metre

    E)      0.6metre

     

    61)    Galvanized winding ropes are not required to be used in

    A)      dry shafts

    B)      Both B & C

    C)      Both A & C

    D)     wet shafts

    E)      upcast shafts

     

    62)    The angle of fleet in terms of winding is the angle

    A)      none of these

    B)      zero degree

    C)      both of the above

    D)     between the vertical plane of the pulley and the rope when the cage is at pit top

    E)      between the rope of both the pulley when it is extended

     

    63)    Automatic contrivance is used in

    A)      direct haulage

    B)      Endless Haulage

    C)      all of these

    D)     Material winding

    E)      Man winding

     

    64)    Creep in a belt drive is due to

    A)      expansion of belt

    B)      larger size of the driver pulley

    C)      uneven extensions and contractions due to varying tension

    D)     material of the pulley

    E)      material of the belt

     

    65)    Plans, sections and records reqd as per CMR, 2017, Regulation no.

    A)      257

    B)      255

    C)      256

    D)     253

    E)      254

     

    66)    Melting point of white metal used for re-capping of mine winder ropes is

    A)      600°C

    B)      270°C

    C)      400°C

    D)     150°C

    E)      365°C

     

    67)    Location of surge tank in an hydro electric power station,is near

    A)      penstock

    B)      tail race

    C)      reservoir

    D)     turbine

    E)      Dam

     

    68)    The powerfactor of an open ended cable can be improved by

    A)      none

    B)      increasing the capacitance

    C)      increasing the conductor resistance

    D)     increasing the inssulation resistance

    E)      decreasing the capacitance

     

    69)    Use of self-rescuer reqd as per CMR, 2017, Regulation no

    A)      242

    B)      241

    C)      244

    D)     243

    E)      240

     

    70)    The condition of electrolyte in a battery is measured in terms of:

    A)      current value

    B)      acid contents

    C)      None of the above

    D)     specific gravity

    E)      voltage output

     

    71)    Service Control Valve in the SDL machine is used for

    A)      Both A & C

    B)      Moving the machine forward or backward

    C)      Moving the machine left or right

    D)     Both A & B

    E)      Lifting & tilting of the bucket

     

    72)    If a person studies about a fluid which is at rest, what will you call his domain of study?

    A)      Fluid Kinematics

    B)      Fluid Dynamics

    C)      None of these

    D)     Fluid Mechanics

    E)      Fluid Statics

     

    73)    Short circuit protection is provided in the circuit breaker by:

    A)      None of the above

    B)      Magnetic release

    C)      Low voltage release

    D)     magnetic and thermal release

    E)      Thermal release

     

    74)    Cleaned & free from loose material of floor of cage, required as per CMR2017, regulation no.

    A)      83 (2)

    B)      83 (1)

    C)      83 (3)

    D)     83(5)

    E)      83(4)

     

    75)    The track chain in a track mounted machine moves over

    A)      sprockets at both ends

    B)      sprocket and idler at the ends

    C)      Rollers at both ends

    D)     Idler and roller at the ends

    E)      Idler at both ends

     

    76)    The type of gear used for speed reduction of 50:1 will be

    A)      bevel

    B)      worm wheel

    C)      spur

    D)     herringbone

    E)      hypoid

     

    77)    Dozers can be classified as

    A)      All of them

    B)      Both A & B

    C)      Crawler mounted dozers

    D)     Wheel mounted dozers

    E)      Dozer with cable operated blade

     

    78)    A dragline is specified by

    A)      Supplying voltage

    B)      Both A & B

    C)      Power of the machine

    D)     Boom length only

    E)      Bucket capacity only

    80)    Head developed by the pump depends on

    A)      power of the pump

    B)      all of the above

    C)      Speed of the impeller

    D)     desgin of the impellor

    E)      desgin of the casing

     

    81)    Flame trap is used with

    A)      Endless haulage

    B)      Diesel locomotive

    C)      Pump

    D)     Belt conveyor

    E)      Direct haulage

     

    82)    Slip ring induction motor is mainly used with

    A)      Main & tail rope haulage

    B)      Belt Conveyor

    C)      Chain Conveyor

    D)     Endless haulage

    E)      Tail rope haulage

     

    83)    An automatic indicator shall be provided at the pit top to see easily by the banksmen to show that

    A)      automatic contrivance was fully engaged

    B)      the position of the keps

    C)      no of persons riding in the cage

    D)     both A & B

    E)      depth of the shaft

     

    84)    Any obscure physical change in rope due to repeated stress is

    A)      wear

    B)      deformation

    C)      corrosion

    D)     fatigue

    E)      none of these

     

    85)    PVC stans for:

    A)      Penta vinyl chloride

    B)      Positive Voltage conductor

    C)      Pressed and varnised cloth

    D)     Post varnish conductor

    E)      Poly vinyl chloride

     

    86)    A method of cooling a power transformer is -

    A)      Forced air cooling

    B)      Oil cooling

    C)      All of the above

    D)     Natural air cooling

    E)      none of these

     

    87)    The steel used in the excavator bucket teeth

    A)      Medium carbon steel

    B)      High speed steel

    C)      Manganese steel

    D)     Stainless steel

    E)      Nickel steel alloy

     

    88)    At the time of starting, the slip of an induction-motor is equal to:

    A)      zero

    B)      infinite

    C)      none of these

    D)     unity

    E)      two

     

    89)    After what depth of sinking shaft it is mandatory to provide detaching hook in the bucket or other means of conveyance.

    A)      45 metre

    B)      60 metre

    C)      50 metre

    D)     40 metre

    E)      55 metre

     

    90)    The magnetic field produced in the stator of a three phase induction motor travels at ……………….

    A)      synchronous speed

    B)      asynchronous speed

    C)      None of the above

    D)     slip speed

    E)      rotating speed

     

    91)    The dynamic viscosity of a fluid is 1 Poise. What should one multiply to it to get the answer in N-s/m2?

    A)      100

    B)      10

    C)      1000

    D)     0.1

    E)      1

     

    92)    The coal of the lowest calorific value is

    A)      steam coal

    B)      all of the above

    C)      anthracite

    D)     bituminous

    E)      lignite

     

    93)    Which of the following statement is true?

    A)      Casting and the pattern are same things

    B)      All are true

    C)      Casting is the replica of the object to be cast

    D)     Pattern is the replica of the casting object

    E)      Molten material is casted into the casting cavity

     

    94)    The maximum temperature in the I.C.engine cylinder is of order of

    A)      1500-2000° C

    B)      2500-3000° C

    C)      1000-1500° C

    D)     500-1000° C

    E)      2000-2500° C

     

    95)    On a curve this force creates a tendency for the train to leave the track causing excessive wear on wheels

    A)      gravitational

    B)      dynamic

    C)      centrifugal

    D)     frictional

    E)      centripetal

     

    96)    The property by which a body returns to its original shape after removal of the force, is called

    A)      Tenacity

    B)      Elasticity

    C)      Malleability

    D)     Ductility

    E)      Plasticity

     

    97)    Sequence Control is used in which transporation system?

    A)      Train of tubs

    B)      Rope haulage

    C)      Belt Conveyor

    D)     Aerial ropeway

    E)      Winding

     

    98)    An apparatus which is operated in a fixed position but which is so designed as to be capable of being moved readily from one place to another is called

    A)      None of the above

    B)      switchgear

    C)      portable hand lamp

    D)     Portable apparatus

    E)      transportable apparatus

     

    99)    The number of persons allowed to ride in same cage are decided by manager as per formula

    A)      0.30 square metre of floor area per person

    B)      0.20 square metre of floor area per person

    C)      0.10 square metre of floor area per person

    D)     0.25 square metre of floor area per person

    E)      0.15 square metre of floor area per person

     

    100)  Max Ladder inclination in shaft should be (In degree)

    A)      30

    B)      50

    C)      40

    D)     80

    E)      60


    CLICK ME TO DOWNLOAD Question Paper _ Key of SECOND CLASS UNRESTRICTED UNDER CMR - MINING MACHINERY




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