FMC- Mining Machinery DGMS CMR Last Year Paper

FMC- Mining Machinery DGMS CMR Last Year Paper

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Question Text:

For no slip condition the limiting ratio of the tension of the two sides of a belt conveyor is

Options:
(1)    T1/T2 < eµF

(2)    T1/T2 = eµF
(3)    T1/T2 > eµF
(4)    T1/T2 = eµF
(5)    None of the Options

Correction Answer : Option No.(2)

Question Text:

Minimum number of dead turns of the rope on drum in winder

Options:

(1)    1 turn

(2)    1-2 turns

(3)    2-3 turns

(4)    3-4 turns

(5)    5 turns

Correction Answer : Option No.(3)

Question Text:

Automatic contrivances provided with drum winder is mandatory for the shaft depth of

Options:

(1)    <60m

(2)    60-90m

(3)    =100m

(4)    150m

(5)    200m

Correction Answer : Option No.(3)

Question Text:

Recapping of haulage rope should be performed once at least in every

Options:

(1)    3 months

(2)    6 months

(3)    9 months

(4)    1 year

(5)    1½ years

Correction Answer : Option No.(2)

Question Text:

The fluid used in the SDL and LHD machines is

Options:

(1)    HFA

(2)    HFB

 
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(3)     HFC
(3)    HFD

(4)    Mineral Oil

Correction Answer : Option No.(2)

Question Text:

The ratchet and pinion mechanism is used

Options:

(1)    To restrict the rotation in one direction.

(2)    To restrict the rotation in both direction.

(3)    To allow the rotation in both direction.

(4)    To lift load.

(5)    None of the Options

Correction Answer : Option No.(1)

Question Text:

The loop take up system of belt conveyor is provided for

Options:

(1)    For tensioning the belt when required

(2)    To accommodate extra belt

(3)    To avoid regular shortening of the belt

(4)    Used in longer- lengths of conveyors

(5)    All the Options

Correction Answer : Option No.(5)

Question Text:

Compressed air driven machines are generally designed for the operating pressure

Options:

(1)    <3 bar

(2)    3-5 bar

(3)    6-7 bar

(4)    8-10 bar

(5)    > 10 bar

Correction Answer : Option No.(3)

Question Text:

One of these is not a safety device in the belt conveyor system

Options:

(1)    Pull cord system

(2)    Lock out system

(3)    Painter plate

(4)    Pre-start warning system

(5)    Warning through Telephone

Correction Answer : Option No.(3)

Question Text:

The fibre core of a wire rope is thoroughly impregnated with a lubricant for all but one of the following reasons
 
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Options:

(1)    To prevent absorption of moisture

(2)    To inhibit corrosion inside the rope

(3)    To give additional strength to the rope

(4)    To preserve the shape of the rope under strain

(5)    None of the Options

Correction Answer : Option No.(3)

Question Text:

Which of the following advantages of Koepe Winder is FALSE

Options:

(1)    Requires only half the space needed for the Drum Winder

(2)    Most suitable for winding bigger loads from greater depths

(3)    Suitable for winding from more than one level

(4)    Arrangement is simple,compact and lighter

(5)    No extra coils of main rope is required.

Correction Answer : Option No.(1)

Question Text:

AFC in longwall mining stands for

Options:

(1)    Armed face conveyor

(2)    Armoured face conveyor

(3)    Armed flexible conveyor

(4)    Armoured flexible chain

(5)    None of the Options

Correction Answer : Option No.(2)

Question Text:

For a given set of geo-mining conditions, the longwall package is decided upon

Options:

(1)    The capacity of the powered supports

(2)    The capacity of the shearer machine

(3)    The capacity of the AFC

(4)    The capacity of the power pack

(5)    The capacity of the gate belt conveyor

Correction Answer : Option No.(1)

Question Text:

Which of the following do not have identical dimensions

Options:

(1)    Momemtum and impulse

(2)    Torque and energy

(3)    Torque and work

(4)    Moment of a force and angular momentum

(5)    None of the Options
 
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Correction Answer : Option No.(4)

Question Text:

Forging means

Options:

(1)    Heating and striking

(2)    Heating

(3)    Melting

(4)    Hammering

(5)    Turning

Correction Answer : Option No.(1)

Question Text:

Head and tail stocks are the main components of

Options:

(1)    Lathe machine

(2)    Milling machine

(3)    Shaper machine

(4)    Drilling machine

(5)    Planer machine

Correction Answer : Option No.(1)

Question Text:

Prime mover of electric dumper

Options:

(1)    Diesel engine

(2)    Electric motor

(3)    Hydraulic motor

(4)    Pneumatic motor

(5)    All the Options

Correction Answer : Option No.(1)

Question Text:

Gate end box is basically a

Options:

(1)    Transformer

(2)    Junction Box

(3)    Switch gear with protective devices

(4)    Transformer and Junction Box

(5)    All the Options

Correction Answer : Option No.(3)

Question Text:

Which of these is not a safety feature in the continuous miner

Options:

(1) Water interlock
 
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(2)    Dust scrubber

(3)    Methane monitor

(4)    Gathering arm

(5)    Emergency stop switch

Correction Answer : Option No.(4)

Question Text:

The blade of multi-stage axial flow fan is of

Options:

(1)    Aerofoil Cross-section

(2)    Trapezoidal Cross-section

(3)    Rectangular Cross-section

(4)    Square Cross-section

(5)    None of the Options

Correction Answer : Option No.(1)

Question Text:

__________ is mounted on the boiler and its function is to put off the fire in the furnace when water level falls below the safe limit

Options:

(1)    stop valve

(2)    safety valve

(3)    fusible plug

(4)    blow off cock

(5)    None of the Options

Correction Answer : Option No.(3)

Question Text:

Which of the these is not a circuit breaker

Options:

(1)    OCB

(2)    VCB

(3)    SF6

(4)    ACB

(5)    None of the Options

Correction Answer : Option No.(5)

Question Text:

Speed control of induction motor can be effected by varying

Options:

(1)    Flux

(2)    Voltage input to stator

(3)    Keeping rotor coil open

(4)    All the options

(5)    None of the Options

Correction Answer : Option No.(2)
 
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Question Text:

The transfomer laminations are insulated from each other by

Options:

(1)    Mica strip

(2)    Thin coat of varnish

(3)    Paper

(4)    All the options

(5)    None of the Options

Correction Answer : Option No.(2)

Question Text:

CBT used in gateend box is to sense

Options:

(1)    Over load current

(2)    Single phasing

(3)    Unbalanced supply system

(4)    Earth fault current

(5)    All the Options

Correction Answer : Option No.(4)

Question Text:

Flexible trailing cable used with

Options:

(1)    Shearer motor

(2)    Rope haulage motor

(3)    Mine winder motor

(4)    Pump motor

(5)    All the Options

Correction Answer : Option No.(1)

Question Text:

Flameproof enclosure is necessary for

Options:

(1)    Intrinsically safe circuit

(2)    Coal face motor

(3)    Gate end box

(4)    Coal face motor and Gate end box

(5)    All the Options

Correction Answer : Option No.(4)

Question Text:

Haulage signalling cirucit is

Options:

(1)    Intrinsically safe circuit

(2)    High voltage circuit

(3)    Low voltage circuit
 
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(4)    Capacitive circuit

(5)    inductive circuit

Correction Answer : Option No.(1)

Question Text:

Static Ward-Leonard Device is used to control the speed of

Options:

(1)    DC motor

(2)    Induction motor

(3)    Synchronous motor

(4)    Shunt motor

(5)    Compound motor

Correction Answer : Option No.(1)

Question Text:

Drill cable is a

Options:

(1)    5 core flexible trailing cable

(2)    Five core pliable wire armoured trailing cable

(3)    Three core PVC cable

(4)    3.5 core XLPE cable

(5)    All the Options

Correction Answer : Option No.(1)

Question Text:

Retarder is put into operation when dumper is moving in

Options:

(1)    uphill road

(2)    down hill road

(3)    undulated road

(4)    level road

(5)    All the Options

Correction Answer : Option No.(2)

Question Text:

The function(s) of turbo-charger in engines is

Options:

(1)    supply engine cylinder with compressed air

(2)    increase the power output

(3)    supply engine cylinder with compressed air and increase the power output

(4)    None of the Options

(5)    increase speed
 

Correction Answer : Option No.(3)

Question Text:

Nitrogen gas under pressure is filled in dragline boom for
 
FMC- Mining Machinary

Options:

(1)    increasing the strength of the boom

(2)    detecting crack in the boom

(3)    resisting corrosion

(4)    making environment eco-fiendly

(5)    All the Options

Correction Answer : Option No.(2)

Question Text:

PVC belt possesses

Options:

(1)    fire resistance property

(2)    anti slippage property

(3)    high co-efficient friction value than rubber belt

(4)    None of the Options

(5)    high capacity of transportation

Correction Answer : Option No.(1)

Question Text:

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

Options:

(1)    150°C

(2)    270°C

(3)    365°C

(4)    600°C

(5)    400°C

Correction Answer : Option No.(3)

Question Text:

Centrifugal fan develops

Options:

(1)    equall pressure as developed by axial flow fans

(2)    less pressure than developed by axial flow fans

(3)    higher pressure than developed by axial flow fans

(4)    only flow

(5)    only pressure

Correction Answer : Option No.(3)

Question Text:

Jack hammer drills are

Options:

(1)    rotary type drill machine

(2)    rotary percussive type drill machine

(3)    percussive type drill machine

(4)    DTH type drill machine

(5)    None of the Options
 
FMC- Mining Machinary

Correction Answer : Option No.(3)

Question Text:

Gate end box is basically a

Options:

(1)    star-delta starter

(2)    A DOL Starter

(3)    A step up transformer

(4)    A step down transformer

(5)    Auto transformer starter

Correction Answer : Option No.(2)

Question Text:

Function of cowl and dozer plate in shearer is

Options:

(1)    to protect the cutting drum from loose coal failing from roof

(2)    to protect the cutting drum from coal dust

(3)    to increase the coal loading efficiency

(4)    to increase the coal cutting efficiency

(5)    All the Options

Correction Answer : Option No.(3)

Question Text:

Why fleet angle is limited to 1.5°

Options:

(1)    To reduce the side travel on the pulley

(2)    To prevent excessive wear and tear of the winding rope.

(3)    To allow maximum persons to travel at a time.

(4)    It allows use of rope having lesser diameter

(5)    It allows minimum slippage.

Correction Answer : Option No.(2)

Question Text:

One killowatt is equal to

Options:

(1)    1 HP

(2)    1.34 HP

(3)    1.40 HP

(4)    1.50 HP

(5)    1.74 HP

Correction Answer : Option No.(2)

Question Text:

In torque converter

Options:

(1)    Input torque > Output torque

(2)    Output torque > Input torque
 
FMC- Mining Machinary

(3)    Input torque= Outpur torque

(4)    Input speed = Output speed

(5)    Input speed < Output speed

Correction Answer : Option No.(2)

Question Text:

Composition of white metal is

Options:

(1)    Fe, Sn, Cu, Pb

(2)    Au, Sn, Cu, Pb

(3)    Au, Ag, Sb, Pb

(4)    Sn, Sb, Cu, Pb

(5)    None of the Options

Correction Answer : Option No.(4)

Question Text:

A typical composition of steel ropes percentage wise , used in mining , is

Options:

(1)    C-0.5, S-0.003, P-0.014, Fe-Rest

(2)    C-2.0, S-0.003, P-0.014, Fe-Rest

(3)    C-2.0, S-3.0, P-0.014, Fe-Rest

(4)    C-0.5, S-3.0, P-0.014, Fe-Rest

(5)    None of the Options

Correction Answer : Option No.(1)

Question Text:

A steam winder of 25 HP is used for both man and material winding as well as coal winning .The driver of the winder should possesses

Options:

(1)    I Class Engine Driver's Certificate

(2)    II Class Engine Driver's Certificate

(3)    Manager's Permit

(4)    Manager's authorisation

(5)    None of the Options

Correction Answer : Option No.(2)

Question Text:

Setting pressure of a powered support should be _____% of yield pressure of the powered support

Options:

(1)    50

(2)    50-60

(3)    65-75

(4)    75-85

(5)    More than 85

Correction Answer : Option No.(4)
  Question Text:
 
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Hydraulic pressure is required at the gate belt conveyor for

Options:

(1)    Tensioning the belt

(2)    Shortening the belt

(3)    Shifting the gate belt tailend function

(4)    Providing sprinkling arrangement on the gate belt

(5)    All the Options

Correction Answer : Option No.(3)

Question Text:

Buttress supports in a longwall face

Options:

(1)    Face end supports at the gate roads

(2)    Mid face supports

(3)    Supports over the stage loader

(4)    supports at the 35% and 65% portion of a longwall face where load is maximum

(5)    None of the Options

Correction Answer : Option No.(1)

Question Text:

Time dependent yield is known as

Options:

(1)    Fracture

(2)    Fatigue

(3)    Buckling

(4)    Creep

(5)    None

Correction Answer : Option No.(4)

Question Text:

Blair winder is basically a

Options:

(1)    Multi-rope double drum winder

(2)    Single rope friction winder

(3)    Multi-rope friction winder

(4)    Single rope drum winder

(5)    Drum with center weight

Correction Answer : Option No.(1)

Question Text:

A vane pump and gear pump are a type of

Options:

(1)    Non-positive displacement pump

(2)    positive displacement pump

(3)    either positive displacement or non-positive displacement pump

(4)    reciprocating pump
 
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(5) All the Options

Correction Answer : Option No.(2)

Question Text:

In isentropic process of compression, the change in entropy is

Options:

(1)    more than zero

(2)    less than zero

(3)    equals to zero

(4)    All the options

(5)    None of the Options

Correction Answer : Option No.(3)

Question Text:

The methane sensor incorporated in the continuous miner cuts off the power to the machine, when the methane percentage reaches.

Options:

(1)    0.75

(2)    1

(3)    1.25

(4)    1.5

(5)    >2.00

Correction Answer : Option No.(1)

Question Text:

Compression ratio of diesel engine has a range of

Options:

(1)    8 to 10

(2)    10 to 15

(3)    16 to 20

(4)    21 to 25

(5)    None of the Options

Correction Answer : Option No.(3)

Question Text:

The neutral point is the position of the booster at which

Options:

(1)    The pressure difference between the intake and return is equal the booster fan pressure

(2)    The pressure difference between the intake and return is less than the booster fan pressure

(3)    The pressure difference between the intake and return is higher than the booster fan pressure

(4)    All the options

(5)    None of the Options
 

Correction Answer : Option No.(1)

Question Text:

The accurate sizing and finishing operation performed on a previously drilled hole is called as
 
FMC- Mining Machinary

Options:

(1)    Drilling

(2)    Boring

(3)    Shaping

(4)    Reaming

(5)    Sinking

Correction Answer : Option No.(4)

Question Text:

The full load copper loss of a transformer is 1600 W. At half-load the copper loss will be

Options:

(1)    6400W

(2)    1600W

(3)    800W

(4)    400W

(5)    None of the Options

Correction Answer : Option No.(4)

Question Text:

Power transformers are generally designed to have maximum efficiency around

Options:

(1)    No load

(2)    Half load

(3)    Near full load

(4)    10% overload

(5)    None of the Options

Correction Answer : Option No.(3)

Question Text:

The power factor in an AC circuit is defined as

Options:

(1)    The actual power divided by the maximum power the circuit can handle

(2)    The ratio of the real power to the imaginary power

(3)    The ratio of the apparent power to the true power

(4)    The ratio of the true power to the apparent power

(5)    The ratio of the imaginary power to the apparent power

Correction Answer : Option No.(4)

Question Text:

A transformer has negative voltage regulation when its load power factor is

Options:

(1)    Zero

(2)    Unity

(3)    Leading

(4)    Lagging

(5)    None of the Options
 
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Correction Answer : Option No.(3)

Question Text:

The DC motor, which can provide zero speed regulation at full load without any controller is

Options:

(1)    Series

(2)    Shunt

(3)    Cumulative compound

(4)    differential compound

(5)    None of the Options

Correction Answer : Option No.(2)

Question Text:

Three phase double cage induction motor for shearer machine demands

Options:

(1)    High starting torque

(2)    constant speed

(3)    Low starting voltage

(4)    Low starting torque

(5)    Low starting power

Correction Answer : Option No.(1)

Question Text:

Full load slip of induction motor should be

Options:

(1)    Low

(2)    High

(3)    Zero

(4)    one

(5)    None of the Options

Correction Answer : Option No.(1)

Question Text:

Transformer neutral for three phase power supply of shovel is grounded to a resistor to avoid

Options:

(1)    Shock hazard

(2)    Explosion hazard

(3)    High earth fault current

(4)    High voltage hazards

(5)    Shock hazard and High earth fault current

Correction Answer : Option No.(5)

Question Text:

6 x 21 stranded rope of same diameter is

Options:

(1)    more rigid compared to 6 x 9 stranded rope

(2)    more flexible compared to 6 x 9 stranded rope
 
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(3)    equally rigid and equally flexible like 6 x 9 stranded rope

(4)    more rigid and less flexible compared to 6 x 9 stranded rope

(5)    All the Options

Correction Answer : Option No.(2)

Question Text:

Lilly controller in drum winder is required

Options:

(1)    To immediately apply the brake when a man tries to enter into the cage before stopping

(2)    To stop the hoist immediately when normal speed is exceeded.

(3)    To check whether the skip is properly filled before hoisting

(4)    To prevent over speeding in lowering and raising a skip

(5)    To prevent over loads of the winder.

Correction Answer : Option No.(4)

Question Text:

The profile of the gear teeth

Options:

(1)    Cycloidal

(2)    Helical

(3)    Involute

(4)    Cycloidal and Involute

(5)    Helical and Involute

Correction Answer : Option No.(4)

Question Text:

The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4 th of its maximum crushing stress of punch, is equal to (where t = Thickness of the plate)

Options:

(1)    t

(2)    2t

(3)    4t

(4)    8t

(5)    3t

Correction Answer : Option No.(3)

Question Text:

When trying to turn a key into a lock, following is applied

Options:

(1)    Couple

(2)    Non-coplanar forces

(3)    Moment

(4)    Coplanar force

(5)    Non-complaner force

Correction Answer : Option No.(1)
  Question Text:
 
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In a hydrodynamic journal bearing, there is

Options:

(1)    a very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing
(2)    a thick film of lubricant between the journal and the bearing

(3)    no lubricant between the journal and the bearing

(4)    a forced lubricant between the journal and the bearing

(5)    None of the Options

Correction Answer : Option No.(2)

Question Text:

The usual stroke frequency of jack hammer drill is

Options:

(1)    500 strokes/min

(2)    1000 strokes/min

(3)    2200 strokes/min

(4)    1500 strokes/min

(5)    2500 strokes/min

Correction Answer : Option No.(3)

Question Text:

The basic difference in the fan, compressor and blower is

Options:

(1)    in their operating speed

(2)    compression ratio of air

(3)    rate of air delivered

(4)    power of the machine

(5)    None of the Options

Correction Answer : Option No.(2)

Question Text:

1 mm water gauge is equivalent to

Options:

(1)    10 Pa

(2)    1.0 Pa

(3)    100 Pa

(4)    0.10 Pa

(5)    5 Pa

Correction Answer : Option No.(1)

Question Text:

Dozer blade has the dimension of 4500 mm x 2000 mm operates on level ground. The output capacity of the dozer is

Options:
(1)    11 m3 approx)

(2)    15 m3 (approx)
 
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(3)    20 m3 (approx)

(4)    8 m3 (approx)
(5)    10 m3 (approx)

Correction Answer : Option No.(1)

Question Text:

The maximum static tension on a rope when the weight of the cage with its suspension gear etc. Is 6 tonnes, hoisting depth is 300 m and rope weight is 40 N/m

Options:

(1)    70 kN

(2)    72 kN

(3)    75 kN

(4)    80 kN

(5)    100 kN

Correction Answer : Option No.(2)

Question Text:

A refrigerator operates between 255 K and 303 K has the maximum possible coefficient of performance

Options:

(1)    21.32

(2)    2.35

(3)    1.8

(4)    2.1

(5)    2.5

Correction Answer : Option No.(1)

Question Text:

Power factor of synchronous motor

Options:

(1)    can be controlled

(2)    can not be controlled

(3)    may vary between lagging and leading power factor

(4)    can be controlled and may vary between lagging and leading power factor

(5)    All the Options

Correction Answer : Option No.(4)

Question Text:

An AFC of length 114 m run at a speed of 0.535 m/sec. The mass of chains and flights is 54 kg.m, and the coefficient of friction between the chain and through is 0.33. The power needed to run the empty conveyor is

Options:

(1)    6.94 kW

(2)    10.68 kW

(3)    21.36 kW

(4)    25.74 kW

(5)    15 kW
 
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Correction Answer : Option No.(2)

Question Text:

A conveyor is 600 m long and carried coal of bulk density 0.8 t/ m3 up a gradient of 1 in 60 at the rate of 220 t/hr.

If the belt width (w) is 0.75 m and cross sectional area of the materials is 0.1 w2 determine the belt speed

Options:

(1)    0.04 m/sec

(2)    0.96 m/sec

(3)    1.36 m/sec

(4)    1.80 m/sec

(5)    1.5 m/sec

Correction Answer : Option No.(3)

Question Text:

The percentage of Manganese is in the steel used for the bucket teeth of an excavator

Options:

(1)    1% - 1.5%

(2)    > 1%

(3)    1.5% - 5%

(4)    5% - 8%

(5)    11% - 14%

Correction Answer : Option No.(5)

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