GATE MN Mining Machinery PYQs & Answers

Questions 1–10 of 56. Imported answers require independent review unless marked reviewed.

A rake of wagons, with inter-wagon gap of 100 cm, is moving at a speed of 0.4 km per hour under a silo loading system. The dimensions of the wagon are 8 m (L) × 3 m (W) × 3 m (H). The silo stops discharging the material between the wagons. Considering the fill factor of the wagon as 0.95 and the bulk density of coal as 1.2 tonne per cubic meter, the loading rate of the silo, in tonne per hour, is ____________. (rounded off to nearest integer)

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A turbine pump is designed to generate water head of 60 m. The impeller speed of the pump is 2000 rpm and the manometric efficiency is 70%. Neglecting the impeller blade curvature, the impeller diameter of the pump, in cm, is _____________. (rounded off to two decimal places)

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The information for a dragline operation is given:

Bucket capacity: 20 m

Bucket fill factor: 0.9

Digging and filling time: 20 s

Swinging (to and fro) time: 32 s

Dumping time: 10 s

Dragline utilization: 90%

The output of the dragline, in m

, is ________. (rounded off to one decimal place)

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A coal seam of 2.4 m thickness is mined with a DERD shearer at a cutting speed of 0.6 km h

. The web depth of the cut is 0.5 m. The average cross-sectional area of coal on the AFC during transportation is 0.24 m

. For the evacuation of cut coal from the face with 10% spillage, the required minimum velocity of the AFC, in m s

, is ____________. (rounded off to two decimal places)

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The safety device used to arrest forward runaway tubs in rope haulage, is

Your answerChoose one option.

monkey catch

drop warwick

stop-block

backstay

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In a shovel dumper combination, the loading time of a dumper is 3 minutes. The shovel serves 8 dumpers. If the cycle time of a dumper including its loading time is 22 minutes, the waiting time of a dumper, in minute, is_____ (in integer)

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The CORRECT statement(s) of dragline operation is/are -

Your answerSelect all correct options. You can choose more than one.

The initial cut is called “Key” cut.

Tandem method of operation requires at least two draglines.

Dragline excavates material above the working bench.

Dragline can move with walking pad.

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A continuous miner serves two shuttle cars of 12 tonne capacity each. Shuttle cars I and II operate with a total cycle time of 12 minutes and 15 minutes respectively, which includes loading time of 8 minutes for each car. The production rate of the continuous miner, in tonne/hour, is ________ (rounded off to 2 decimal places)

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A direct rope haulage has the following details

Output = 24 tonne/hour

Length of trip = 610 m

Gradient = 1 in 12

Capacity of mine car = 1.0 tonne

Tare weight of mine car = 0.5 tonne

Average rope speed = 1.694 m/s

Change over time of cars = 3 minute

Acceleration due to gravity = 10.0 m/s^2

Neglecting all frictional resistance and mass of the rope, the minimum power required, in kW, to raise the loaded mine cars is ______ (rounded off to 3 decimal places).

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For a geared engine winding system, the man winding cage is placed at its normal position at pit top of the shaft. As per CM 2017, the minimum space, in m, between the center of the hole of the detaching hook attached to the rope shackle and detaching belt plate is

Your answerChoose one option.

3.6

2.4

1.8

1.5

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GATE MN Mining Machinery PYQs

How to practice Mining Machinery

Question 55

Question 56

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Question 60

Question 15

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Question 48

Question 15