Mining Machinery

The formula applicable to drag loss due to regular obstructions in fluid flow.

The power required varies as a product of pressure and . . . . . . . .

In practice, however, a vertical lift of . . . . . . . . m should be considered to be a convenient maximum height of a suction pipe.

The voltage at which the coal drill runs is . . . . . . . .

The law applicable to terminal setting velocity of fine particles in fluid.

In cage winding the ratio of pay load/gross load of cage is . . . . . . . .

Pressure gauge fitted on the . . . . . . . . branch.

The ratio of pay load/gross load of loaded skip in skip wining is . . . . . . . .

Safety detaching hooks are examined, dismantled, refitted at least once in every . . . . . . . . months.

For single ended shearer the maximum seam thickness is suitable is . . . . . . . . m.

If the mine car type is Drop bottom, the mode of unloading provided is . . . . . . . .

Pilot circuit voltage in coal drill . . . . . . . .

The number of plate consists in king detaching safety hook

In high speed runs of rope in direct rope haulage system causes . . . . . . . . of tubs.

Number of tracks and ropes, drums required for direct rope haulage . . . . . . . .

Tilting plat form consists of swinging rails covered with . . . . . . . .

Gathering arm loaders can be employed to work gradients upto . . . . . . . .

The fleet angle in Koepe winding is . . . . . . . .

The diameter of the groove of the head gear pulley should be . . . . . . . . of the rope diameter for stranded ropes.

The type of drill rod used for coal drilling . . . . . . . .

In king safety hook the movable plates called . . . . . . . .

Direct rope haulage can be installation needs . . . . . . . . roads.

The shear cuts from the coal face a slice thickness . . . . . . . . mm.

The main methods of transport systems are . . . . . . . .

Type of rope most suitable for balancing rope in koepe winding is . . . . . . . .

'Tucking' the word used in . . . . . . . .

When the impeller revolves the water is carried round by the blades and thrown off from the impeller periphery at an increased radial . . . . . . . . and . . . . . . . .

Safety catch consists basically of short livers mounted in head gear at intervals that very from . . . . . . . .

To prevent the mine tubs falling out of the cage . . . . . . . . are provided on the floor which act against sides of the mine car.

Ropes of stainless steel not used in . . . . . . . .

Figure shows a two pulley system for hoisting a load of 10 kN. The coefficient of friction between each pulley and the rope is 0.2. The vertical and horizontal distances between the centers of the pulleys are 25m and 16m respectively. The tensions T 1 and T 2 respectively in kN are

If the track gauge of underground haulage is 0.6m, radius of curve 2m, Velocity of train 2m/sec, then find out the amount of super elevation.

White metal temperature not exceeding °C during pouring.

A conveyor is 600m long carrying coal having bulk density 0.8 t/m 3 up a gradient of 1 in 60 at the rate of 220 t/hr. If the belt width (w) is 0.75m and cross-sectional area of the material is 0.1w 2 , determine belt speed?

A cage weighing 12000 kg is raised by four chains each making an angle of 30° with the vertical. The tension in each chain in kN is

In koepe winders, the power is transmitted through the friction between

The object of normalising is to remove . . . . . . . .

Corrosion of the rope can be delayed by using . . . . . . . .

It is the ratio between resistance to the motion of a car along a straight level track with constant speed to the total weight of car

In volute casing the water velocity gradually . . . . . . . . and pressure energy of water correspondingly . . . . . . . .

For AM 50 continuous miner application the rock should posses compressive strength of about . . . . . . . .

Safety catches located . . . . . . . . the running position of the cage.

Flitting of the gathering arm loader is possible by . . . . . . . . chain.

Keps are provided and used at the . . . . . . . .

The triangular plate of cage is attached to detaching hook by means of . . . . . . . .

The coal yield per blast by using model 625 Auger drill.

No special fittings or attachments is attached in .the method of rope jointing.

The cross section of the steel guides are usually . . . . . . . .

In order to increase the stability of a mine car the limiting ratio of the length of the body to its wheel axle base generally remains as . . . . . . . .

For how many years the winding rope has to be used?

The Gathering head in gathering arm leader is elevated by . . . . . . . .

Steel rigid guides are installed in some . . . . . . . . mines.

The wires spiral round the core in the same direction as the threads of right hand screw called . . . . . . . .

In main and tail, needs two separate drums one for . . . . . . . . other for . . . . . . . .

One of the rope haulage is . . . . . . . .

The transport arrangement, which operates between main incline/shaft and the main under ground loading point called . . . . . . . .

Which pump must never be started without priming with water as it does not create a vacuum of more than a few centimeters when working on air.

The detaching hook always placed just below the rope . . . . . . . .

The sulphur percentage in wire ropes . . . . . . . .

If the diameter of a wire is 'D' then the diameter of simple round straw rope is

Coal plough mounted on an armoured . . . . . . . . conveyor and cuts slice of coal.

A foot valve in the suction pipe to prevent water returning to the . . . . . . . .

The gathering arms are operated by . . . . . . . . discs.

Ropes used Biocable rope way.

Direct rope haulage not suitable for . . . . . . . . of roads.

Equal lay ropes are also termed as . . . . . . . .

For a positive displacement pump it is the theoretical volume per revolution of the pump shaft called . . . . . . . .

Gathering arms are operated by separate driving . . . . . . . . for each arm.

Which of the following force is not acted on mine car which is in motion.

Head gear pulleys of over . . . . . . . . m diameter are generally constructed in two halfs and bolted together.

Large number of wires in rope is more . . . . . . . .

The form of splice used on haulage ropes known as . . . . . . . .

The capacity of pump is also called as . . . . . . . .

The speed of the rope ranges between . . . . . . . . in endless rope haulage.

In Road header machine the following component is employed.

A lift suspended from the winding rope, open both ends, whose gates can be positioned called . . . . . . . .

Coal plough in employed on . . . . . . . . longwall face with a prop free front.

Wire ropes are made of . . . . . . . .

There may be one ranging drum at one end of the machine known as

Generally the stopper used for drilling . . . . . . . . holes.

The penetration of borer type of continuous miner . . . . . . . . m/min.

In which type of rope haulage the rope passes over the set of tubs called . . . . . . . .

In wedge capping, the wedges have machined groove curved to fit the rope surface and taper approximately . . . . . . . . upon which the 'U' shaped strap is held.

HP of Electric motor model 62.5 Auger drill is . . . . . . . .

In shearer machine, the following component is employed.

Vaccum gauge fitted on . . . . . . . . branch.

Double drum rope haulage provides . . . . . . . . braking.

On a road which dips in bye the tension bogey should be placed at the . . . . . . . . end of haulage road.

Plain carbon steel used in wire rope should have high . . . . . . . . strength.

No mode or type of capping shall be used which fails to withstand a load of atleast 'N' times the maximum static load N is given by . . . . . . . .

Which is the ratio of power output to the power input called . . . . . . . .

Coal cutting machine is used . . . . . . . .

The maganease percentage in wire ropes . . . . . . . .

An extensive application in the working of mine pumps based on . . . . . . . .

In main and tail rope haulage the tail rope length is . . . . . . . .

The safety catches should be inspected . . . . . . . . to prevent accumulation of coal dust to ensure free moves.

Name the method of speed control of large winders usually of above 800 kw

For deep shafts where high outputs is desirable, best suited winding is . . . . . . . .

In LHD system, the transporting scheme is with . . . . . . . .

Which of the following factor has little or no effect on the development of head?

Clifton pulley is used in

A two tonne mine car is released from the top of an incline at a height of 3m as shown in the figure. The mine car travels 45m along the inclined track and another 85m along the horizontal track before coming to rest. The specific rolling resistance of the, car in N/tonne is

A wire rope, round stranded with fibre core, has a diameter of 2.54 cm. What is the mass of the rope per m length if the value of the constant k is 0.36?

A belt conveyor conveys material of average cross-sectional area of 0.09 m 2 . of bulk density 1.5 tonnes/m 3 , at a speed 2 m/s. The carrying capacity of the belt in tonne/hr is

Which of the following device absorbs shock of the vibrations resulting form misalignment?

The above figure shows the duty cycle of hoist system. The system is

Water will not be delivered by a centrifugal pump due to

Which of the following locomotive is not recommended to be used where the coal is liable to spontaneous heating?

Tail rope haulage is mainly used as

One of the conveyor system haulage is . . . . . . . .

In which endless haulage the screw clip can be employed . . . . . . . .

A device that attaches to rotating shaft and converts the energy of motion, into the fluid to be punped.

There are two ranging drum at each end of the machine, known as

The speed of high speed plough . . . . . . . . m/min.

A centrifugal pump rotating at 500 rpm delivers 70 m 3 /s of water. If the speed is reduced to 200 rpm, the quantity of water delivered in m 3 /s will be

The example for equal lay rope is . . . . . . . .

Turbine pump carries . . . . . . . . disc.

A strand with flexible core is more . . . . . . . .

The formula for finding mass of rope whose K is constant.

Function of pull cord in the belt conveyor system is

Detaching hooks are used only with

What is the main purpose of jazz rail on underground haulage track?

If the wires in the strand and the strands in the rope are laid in opposite direction called . . . . . . . .

A 12 tonne diesel locomotive of 60 kW is plying in an underground haulage roadway. The coefficient of adhesion is 0.25 and the maximum gear efficiency is 80%. The speed in m/s at which it will haul a train at its full power is

According to IS specifications 1835 of 1961 neither sulphur nor phosporous content in steel for wire rope should exceed . . . . . . . . percent.

The length of splice is nearly . . . . . . . . for 25mm diameter rope.

Which of the following haulages is one that is situated at a lower level and empties are hoisted up the sloping track?

The rope used for monocable aerial rope way.

What is the track gauge for tubs of 1.1m 3 ?

The amount of margin . . . . . . . . in meters allows a cage to be lifted for materials to be slung beneath it.

One of the Loco haulage is . . . . . . . .

Electric drills commonly used for . . . . . . . .

The drill manufactured by Atlas Copco Ltd. under the trade name of . . . . . . . .

Jack hammer drill used for vertically downward drilling upto a depth of . . . . . . . . m.

If any break down take place in endless haulage, the whole system comes to . . . . . . . .

The wire ropes required to be used in wet shafts are . . . . . . . .

The cutter loader machines work on gradients upto . . . . . . . . degress.

The shearer cuts the coal and loads into . . . . . . . .

In coal plough machine, the following component is employed.

The cores used in a wire rope are . . . . . . . .

The guides are fixed by counter sunk bolts to the buttons placed across the shafts at intervals of . . . . . . . .

Number of cage chains in case of single cage . . . . . . . .

The clip which is tightened on the rope by handle and screw, the handless coupled to draw bar of the tub by long steel rod hinged to top called . . . . . . . .

The output power of the motor which has two poles in coal drill is . . . . . . . .

In dragline (24/96), the power source is . . . . . . . .

The wear resistance of the rope increased by using . . . . . . . .

Regular lay also called as . . . . . . . .

The number of drums provided in double drum balanced haulage . . . . . . . .

What type of ventilation is recommended for SDL/LHD.

Right hand ordinary lay wire rope construction is most useful for

A 1 tonne mine car travelling at a constant speed of 10 km/h collides with a stationary buffer and comes to rest. If the buffer spring stiffness is 200 kN/m, the maximum compression in the spring in mm is

Sillicon percentage in wire ropes . . . . . . . .

All the layers of wires have same pitch or length of lay called . . . . . . . .

The rate at which a machine component oscillates is called

Method of joining two wire ropes permanently without using special fittings or attachments is known as

A direct rope haulage pulls 8 tubs loaded with coal through an incline of length 500 m having an inclination of 1 in 6. Consider the following additional data. Capacity of tub = 1.0 tonne. Tare weight of tub = 500 kg Hauling speed = 9 km per hour Coefficient of friction between wheel and rail = $$frac{1}{{60}}$$ Coefficient of friction between rope and drum = $$frac{1}{{10}}$$ Mass of rope per meter = 1.5 kg The minimum power required to haul the tubs in kW is

Which of the following centre core looks like an independent wire rope?

The series of iron container of scraper chain conveyor over which the flight with chain moves is known as

It is the ratio between the interruptions to the motion of a car along a straight level track with constant speed to the total weight of car

If the wire rope used in wet conditions, it should be . . . . . . . .

Rope is built up of strands and each strand consists of number of concentrically twisted wire laid in the form of halex round a central steel wire called . . . . . . . .

Six standed rope the space factor is between . . . . . . . .

It is the measure of energy increases per unit weight of liquid imparted to the liquid by the pump called . . . . . . . .

Number of cage chains in case of tandem cage . . . . . . . .

Lashing chain employed . . . . . . . . type of endless haulage.

Keps can be used in Koepe winder.

Under standard temperature and pressure conditions, the theoretical maximum height in meters to which water can be lifted using an air lift pump is . . . . . . . .

The head gear of . . . . . . . . are phibited by law.

The reason for langs lay rope never be used it gives to rope to . . . . . . . .

Density is equal to . . . . . . . .

The phosphorous percentage in wire ropes . . . . . . . .

The diameter of the groove of the head gear pulley should be . . . . . . . . of the rope diameter for the locked coil ropes.

The number of units the shear posses . . . . . . . .

The cutter boom mounted on . . . . . . . . on the continuous miner.

In shaker conveyor which of the following action is observed.

Thinner the wires the flexibility of wire rope is . . . . . . . .

The steel body of the coal drill weights . . . . . . . .

The horizontal and vertical positioning of the cutter boom provided by the . . . . . . . .

The pay load is high in . . . . . . . . winding in metal mines.

Skip is used for (unpartioned sumps)

It is the ratio between the interruption to the motion of a car along a straight level track with constant speed to the total weight of car.

The distance between head gear pulley and detaching plate of the rope capel is . . . . . . . .

The cutter boom of continuous miner consists of

The ratio between water H.P. to the B.H.P. of drive motor called . . . . . . . .

The type of coal drill bits used for coal drilling . . . . . . . .

Air leg relieves the . . . . . . . . of the operator.

The maximum value of the efficiency varies with the size and make of the pump and it may range from . . . . . . . . for small pumps.

The example for the ropes subjected to shock loads.

Large head gear pulley minimises . . . . . . . . stresses in the winding rope.

When the water leaves from volute casing of pump it posses high . . . . . . . . energy but only a little . . . . . . . .

A steel or concrete frame work on the mouth of shaft called

The co-efficient of running friction in a michell thrust being is about . . . . . . . .

Which plates of the oremerod safety hooks . . . . . . . . actually transmit the load of the cage to the rope.

Ropes used for guide ropes . . . . . . . .

When a body is immersed, either partially or wholly, in a liquid, the liquid presses vertically upwards with a force equal to weight of the liquid displaced called

Keps are not required at . . . . . . . .

The type of electric motor employed in direct rope haulage.

AM 50 driven by . . . . . . . .

Which haulage system need more number of tubs and rope clips required . . . . . . . .

Which of the indigenous firm do manufacture SDL& LHD in India?

The mass of a rope depends upon the . . . . . . . . of steel.

Which of the following can be used safely right upto the face of coal mine

In coned socket type capel the metal poured is . . . . . . . .

Which metal is used for the purpose of capping of winding ropes?

Ropes used for drag line.

The wire rope which offers better wearing surface and more resistant to bending fatigue called . . . . . . . .

For AFC open-bottom pans are preferable to closed-bottom pans because

Preshaping the wires and strands in to exact helical positions, they assumed in the finished shape called . . . . . . . .

To prated the main driving wheel from wear the C-pulley fitted with renewable . . . . . . . .

The Auger model 625 used upto . . . . . . . . to rise to dip gradient.

The driving pulley of an endless haulage is . . . . . . . .

Diameter of the hole drilled by Jack hammers . . . . . . . . and rarely . . . . . . . .

The bucket capacity of carvo loader is . . . . . . . .

Cage chains are attached to triangular . . . . . . . .

Cone socket capping is applied to . . . . . . . .

The tubs attached to the rope by clips at regular intervals by this haulage . . . . . . . .

The shearing drum canbe raised or lowered in a vertical plane with the help of a . . . . . . . .

The ratio between drum dia to the rope dia is called . . . . . . . .

Space factor of locked coil rope is . . . . . . . .

The Alluminium body of the coal drill weights . . . . . . . .

Expected out put from a continuous miner in underground.

The rope speed is generally . . . . . . . . km/h in direct rope haulage.

Drill rod fits in drill chuck by . . . . . . . . joint the bit attached to the rod by . . . . . . . .

For hoisting in deep mines, the type of drum employed as it reduces the net starting torque.

If U and V are the velocities of water at two points in a pipe line, the difference in pressure energy to water is P =

The head volume curve is considered to be true characteristic of the pump as it depends only on the . . . . . . . .

The type of motor employed in endless haulage . . . . . . . .

Triangular distribution plate is made of . . . . . . . .

Ropes for winding and haulage purpose have a central core of . . . . . . . .

The cutting unit of continuous miner consisting of the cutter head laced with carbide tipped picks and driven by a water cooled . . . . . . . . kw motor through spur gear.

The borer type of continuous miner gives . . . . . . . . rate of advance.

High standard of track maintainance required for hauling the tubs at . . . . . . . .

The back stay arrest the running of tubs in . . . . . . . . direction.

The size of galleries required for employing model 625 Auger drill . . . . . . . .

If the wires in the strand are laid in the same direction as the strands are laid in the rope called . . . . . . . .

The branch road devioting at angle of not more than . . . . . . . . off the main road for employing direct rope haulage.

The cage chains and D links made of . . . . . . . .

The space factor for stranded rope is . . . . . . . .

Untwisting of strands prevented by . . . . . . . .

If the failure of detaching hook to hold the cage, the next safety device may be fitted in head gear is . . . . . . . .

The pressure developed by each impellar varies, as the square of . . . . . . . .

The thrust of the pump is counter acted by . . . . . . . .

In the direct haulage system, which is generally employed up a gradient steeper than . . . . . . . .

In shearer, the power source is . . . . . . . .

Double drum balanced haulage system reduces . . . . . . . .

. . . . . . . . of the circumferance of the rope is in contact with the groove of the head gear pulley.

The plates in oremerod safety hook is assembled on a centre pivot and a copper rivet . . . . . . . . mm diameter passes through a small hole of all the plates when assembled.

The length of splice is nearly . . . . . . . . for 13 mm diameter rope.

Speed of the chain conveyor in AM 50 . . . . . . . . m/sec.

Ropes used for Dozer are . . . . . . . .

The space factor for locked coil rope is . . . . . . . .

Which type of cables are used in portable and transportable apparatus.

Rope becomes fatigue due to repeated application of stress, called . . . . . . . .

Jack hammer drill also called . . . . . . . .

Coal cutting machine is powered by . . . . . . . .

The excessive wear of the winding rope is caused by the angle of contact is . . . . . . . . on the pulley.

CCM cut face gives better.

A dimension less number used to characterise the turbo machinery, normalises impellars to in revolutions per minute to that of a geometrically similar impeller, if it where to deliver 1 gallon per minute against 1 foot of hydraulic head . . . . . . . .

All the chains must be connected at least once in . . . . . . . . months.

In a few cases a Jack hammer may be mounted on . . . . . . . .

'Marrying' the word used in . . . . . . . .

In squiral cage motor and slip ring induction motor . . . . . . . . is similar.

On level road or raising in bye the tension bogey of endless haulage should be placed near the . . . . . . . .

A cage which can accommodate two tubes called . . . . . . . .

Detaching hooks are not employed in . . . . . . . . winding.

Rock and pinion is used for . . . . . . . .

Now a days use of CCM has become obsolate due to introduction of

Continuous miners are available in . . . . . . . . types.

In this system needs two-parallel tracks side by side, one for loads other for empties . . . . . . . .

The rate of penetration of the coal drill . . . . . . . .

In friction winding the pulley are . . . . . . . .

Deployment of machines at the working place from where mineral has to be extracted called . . . . . . . .

The detaching hook provide safety for the . . . . . . . . cage.

The rate at which a machine component oscillates is called . . . . . . . .

The ratio of capacity to the product of the maximum length, width and height is called . . . . . . . .

The drill operated by . . . . . . . . and . . . . . . . . switch.

The rate of flow and total head at which the pump efficiency is maximum at a given speed and impeller diameter . . . . . . . .

Wear on the rope and wear of the pulley results of . . . . . . . . angle is move.

Steel regid guides used for shafts are available to a length of upto . . . . . . . .

The pump casing for a centrifugal type of pump, typically spiral or circular in shape . . . . . . . .

Fleet angle should not exceed.

Coal drill bit is . . . . . . . . type.

AM 50 continuous miners negotiates inclination upto . . . . . . . .

Length of lashing chain usually . . . . . . . . m long.

A double stage reduction . . . . . . . . box helps to utilize the drill in coal or stone of various hardness.

The speed of the machine of Auger type drill model 625 . . . . . . . .

A single stage axial flow halex installed in the suction type fan impeller to lower the NPSHR . . . . . . . .

Which of the indigenous firm do manufacture SDL & LHD in India.

The measuring unit of head is . . . . . . . .

In connection with lowering or raising of persons by means of bucket etc for a shaft exceeding 'A' m depth, there shall be significant cover overhead for protection from things falling down the shaft A is given by . . . . . . . .

The iron percentage in wire ropes . . . . . . . .

The wires sprial round the core in the same direction as the threads of a left hand screw are called . . . . . . . .

The rate of loading of gathering arm loader depend upon the number of . . . . . . . .

Sandwich conveyor is a type of . . . . . . . .

The example for non stranded rope is . . . . . . . .

Lining segments of surge wheel made of . . . . . . . .

Split cappel with rivets normally used in . . . . . . . .

King wire covered by 6 concentrically laid wires called . . . . . . . .

During manufacture the fibre core is heavily . . . . . . . .

Carvo 10 loader running at a speed of . . . . . . . . m/min.

Which hold the water in the delivery column, if the pump stops, when the main valve is open.

The Locomotive, the power source is . . . . . . . .

The shear is mounted on . . . . . . . . . provided with bearing pads which rest on AFC.

Which of the following type of support is to be used for the gallery run by LHD.

Endless haulage system is employed at the gradient of haul road is mild and rarely exceeds . . . . . . . .

Rope with fibre core should be avoided in . . . . . . . .

The automatic loading unloading and decking operations are performed in this type of winding . . . . . . . .

The average value of co-efficient of utilization of space of mine car in Indian u/g mining context varies from . . . . . . . .

The breaking strength of the rope given by the formula.

Friction wheels with differential gear is used with . . . . . . . .

In which type of rope haulage the rope passes under the set of tubs . . . . . . . .

The carbon percentage in wire ropes . . . . . . . .

The units of shearer are . . . . . . . .

The tyre mounted rocker shovel employed at a gradient of . . . . . . . .

Lining segments of surge wheel having a taper of . . . . . . . .

The lay construction is not common for haulage ropes or winding ropes.

The rate of loading of gathering arm loaders of used models are . . . . . . . . t/min.

Small man clip used in . . . . . . . . haulage.

AM 50 mounted on . . . . . . . .

If the rope made up of 6 strands, each strand made by 7 wires . . . . . . . .

The speed of slow speed plough . . . . . . . . m/min.

For remote control the coal drill furnished with iii single pole . . . . . . . . switch.

Endless haulage systems are classified into . . . . . . . . types.

In shearer machine system, the transporting scheme is with . . . . . . . .

Escessive strain of the winding rope is caused by the angle of contact is . . . . . . . . on the pulley.

A single central wire called . . . . . . . .

The type of rope which relives the internal stresses . . . . . . . .

In dint header machine the following component is employed.

The modification of direct haulage system is . . . . . . . .

The ropes used for flexible guides . . . . . . . .

The quantity of water delivered by a given pump varies directly as the . . . . . . . . of impeller.

Guide rope comes under

The rocker shovel equipment, the power source in Indian mining practice is

Coal drill rated with . . . . . . . .

The direct rope haulage can also serves in . . . . . . . . roads.

Two traction motors of . . . . . . . . kw each of carvo loader 310.

The filting plat form tongues over lap and rest on the cage floor by at least . . . . . . . . cm.

In continuous miner system, the transporting scheme is with . . . . . . . .

The total weight at carve 10 loader is . . . . . . . . with empty bucket.

The transport system arranged in the vicinity of the face called . . . . . . . .

Flexible coupling is used between . . . . . . . .

The correct place for the tension bogey is at the point of . . . . . . . . is most likely to occur.

The disadvantage of skip winding is . . . . . . . .

In this system the right hand ordinary lay wire rope is useful.

Mention the safety device is employed for descending cage . . . . . . . .

The surge wheel segments fitted on the rim, of the driving wheel by counter sunk bolts and have . . . . . . . .

The tensile strength of stainless steel is . . . . . . . .

The equation applicable to energy conservation in ideal fluid flow is . . . . . . . .

Suspension gear should be renewed after every . . . . . . . . years.

'Lay' term is used in wire ropes to denote . . . . . . . .

Side discharge loader is a . . . . . . . .

What is the maximum suitable hauling distance for SDL to give best performance

The safety device which is fixed to the last tub of a set when tubs hauled upgradient

When a liquid flows through a passage of varying cross section, the total energy of the moving stream remains constant, assuming no friction losses called

The coal drill essentially contains . . . . . . . . motor in FLP casing.

Impellor of pump rotates rapidly within . . . . . . . .

A universal joint design enables the AM 50 to swing . . . . . . . . degrees each way from the stage belt line.

The chain conveyor is actuated by two . . . . . . . . motors in AM 50 continuous miner.

For winding purpose locked coil ropes are preferred because . . . . . . . .

In endless haulage the rope moves in . . . . . . . . direction.

The foot valve place in the . . . . . . . . side of the pump.

The ratio of aggregate cross sectional area of the wires to the area of a circle drawn around the rope.

If the mine car type is Granby, the mode of unloading provided is . . . . . . . .

Head gears used for tower mounted koepe winders are designed to carry in addition the . . . . . . . .

Weight of model 625 Auger drill machine.

The height of the head gear decided by the . . . . . . . .

The diameter of head gear pulley should be at least . . . . . . . . times of rope diameters.

The wire ropes which carry the burden or load but stationary called . . . . . . . .

Ascent of the pit bottom cage is generally associated with shock load on the winding rope and stress may amount to nearly . . . . . . . .% of the static load.

The back legs of the head gear take care the resultant of the . . . . . . . .

Rope capel which acts when an . . . . . . . . take place.

Which only occurs when the pump is above the inlet reservoir . . . . . . . .

How many types of guides used in mine shafts.

For AM 50 continuous miner application the medium hard rock posses hard ness upto . . . . . . . . on proto dyakonov scale.

When the cage accommodate one single tube called . . . . . . . .

In centrifugal pump of . . . . . . . . construction impeller is mounted on the motor shaft.

Underground transport arrangements are generally divided into . . . . . . . . categories.

The temperature of the coal drill is bring down by using . . . . . . . . fan.

Which valve to enable the pump to be primed with water from the delivery column before starting up, and also small pump is not generally provided.

Head gear should with stand

In gathering arm loader, Jib end can also be slewed through a horizontal plate so as to make an angle of . . . . . . . . to the axis of the machine either side.

Ropes used for CCMS.

Difference between total discharge head and total suction head called . . . . . . . .

If the mine car type is Gable bottom, the mode of unloading provided is . . . . . . . .

The locked coil rope not used for . . . . . . . .

The drills used for high speed drivage of large size drifts and blasting gallery.

The slow moving rope haulage is . . . . . . . .

There is an opening at the centre of the impeller called . . . . . . . .

A wire rope, round stranded with fibre core has a dia meter of 2.54 cm, using the value of K is 0.36. Find the mass of the rope?

The king wire in the flattened strand rope is . . . . . . . . cross section.

The curve which shows how much magnitude of one quantity varies with the changes in some other related quantity called . . . . . . . .

In main and tail rope haulage the length of main rope is . . . . . . . .

Double drum rope haulage installation requires . . . . . . . . roads.

Pressure per unit area varies directly with . . . . . . . .

The direction of laying of wires, in the strand called . . . . . . . .

Which of the following is not a selection criteria of choice of type and size of mine car in a mine.

Oremerod detaching safety hook plates made of . . . . . . . .

The system of haulage suitable for . . . . . . . . roadways, which it is impossible to maintain double track.

The opening of the detaching plate or bell is tested . . . . . . . . by caliper for wear occuring from lashing by rope.

The jaws of the small man clip length is about . . . . . . . . cm.

Direct rope haulage system disadvantage is . . . . . . . .

Mechanical loaders commonly used are . . . . . . . .

Cutter, loader continuous machine give a progress of . . . . . . . . m/day.

The form of splice used in ship ropes . . . . . . . .

There is no balancing disc provided in . . . . . . . . pump.

Ratio of water and emulsion in hydraulic fluid is . . . . . . . .

Generally the drifters are designed for drilling . . . . . . . . holes.

A skip carries a pay load of nearly . . . . . . . . or more.

Endless haulage system not suitable to . . . . . . . . gredients.

The purpose of head gear is to

On observing this tendency of a rope, it is replaced.

The position-of the pump that includes the impellar chamber and volute diffusser . . . . . . . .

In this rope, strands are stitched side by side.

The underground transport arrangements are . . . . . . . .

AM 50 continuous miner designed to cut . . . . . . . . rock.

Road header is used to drive . . . . . . . .

The main bolt passes through all the four plates of the kings safety hook serves as

Detaching hooks are used only for . . . . . . . .

Which one each stage to release the air when priming the pump . . . . . . . .

Can do the rope splicing to an endless rope.

The hydraulic system in AM 50 miner works at a pressure of . . . . . . . . bars.

Which of the following has low FOS and not suitable for shock load or too heavy load.

Ropes used for haulage . . . . . . . .

Coal cutting machine ropes are . . . . . . . . wire rope core.

Steel wire rope of 25mm diameter weighing 37N/m has 6 strands of 7 wires each. The diameter and tensile strength of each wire are 2.5mm and 1800 MPa, respectively. The factor of safety for raising a cage of weight 60 kN from a depth of 200m is

The joining of ropes is termed as . . . . . . . .

How many types of lay of ropes?

The following characteristic curves (P, Q, R, S) pertain to rotary drilling in rock. Title of the curve I : Torque versus RPM II: Rate of penetration versus uniaxial compressive strength of rock III : Rate of penetration versus weight on bit IV : Specific energy versus weight on bit Match the curves with their titles

The ropes which under go frequent movement of coiling they are called . . . . . . . .

The ratio between breaking load and total suspended load on rope called . . . . . . . .

The haulage wire ropes are generally . . . . . . . .

Rotation of impeller inside the pump forces water to enter in the suction pipe. This is effected due to

Cowl is the component of

The equation applicable to pressure loss in laminar flow of fluid . . . . . . . .

The wire rope factory receives from rolling mills coils of steel rods of . . . . . . . . diameter formed from steel ingots by repeated hot rolling.

Oremerod detaching hook consists of . . . . . . . . plates.

The number of impellers on the pump shaft does not exceed . . . . . . . . in order to prevent bending and reducing the length.

The angle between the vertical plane of the winding sheare and the rope when the cage is pit top or pit bottom called . . . . . . . .

In deep shaft, if drum winder used, it may be necessary to consider double layer coiling rope in order to accommodate all the rope on the drum and the fleet angle limited to . . . . . . . .

The haulage arrangement that operates between the working face and main loading points called . . . . . . . .

The ratio between load to effort is called . . . . . . . .

If the wire rope is coated with molten zinc called as . . . . . . . .

Steel rigid guides made of . . . . . . . .

The ramp of gathering head can be raised or lowered usually through . . . . . . . . m.

The detaching hooks commonly used are classified into . . . . . . . . types.

The Auger drill of Eimco Elecon Ltd. trade name model . . . . . . . . SDL base, drill used in coal mines of India.

In bucket wheel excavator system, the transporting scheme is with . . . . . . . .

Koepe winding also called . . . . . . . .

What type of safety features are attached with LHD machine.

The length of splice depend upon the . . . . . . . .

The level joists of head gear carry the . . . . . . . . above the dealing level is equal to overall heigh of cage.

The number of plates movable in kings safety detaching hook . . . . . . . .

The clip consists a pair of steel cheeks, loosely held together by adjustable centre bolt which has a spring sourrounding it to keep the place apart and kept in position by pins supporting lever and coupling hook called . . . . . . . .

For drilling in stone coal drill some times used by changing the gear box to reduced the speed of bit to nearly . . . . . . . . rpm and . . . . . . . . type drill rods used.

Total power of all installed motors in AM 50 . . . . . . . . kw . . . . . . . . V.

Cutter loadders employed in a seam of thickness upto . . . . . . . . m rarely upto . . . . . . . . m.

The ropes used for winding
haulage, coal cutting are the examples of . . . . . . . .

AM 50 normally operated by with . . . . . . . . stage conveyor following the . . . . . . . . strand chain conveyor.

Cross section limits of road way for utilisation of continuous miner AM 50 . . . . . . . . height . . . . . . . . width.