Mining Engineering
GATE MN Mining Machinery PYQs
Build your understanding with focused practice from past exam papers.
Questions 41–50 of 56. Imported answers require independent review unless marked reviewed.
Question 29
Open questionMNMCQ2 marksNeeds review
Match the following based on the equipment usage in a comminution circuit:
Equipment
P. Gyratory crusher
Q. Cone crusher
R. Ball mill
S. Grizzly
Usage
Secondary crushing
Grinding
Sizing
Primary crushing
Your answerChoose one option.
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A shovel operates 300 days in a year, 2 shifts in a day, and 4 hours in a shift to achieve the target production of 30 Million tonne per annum. The following parameters relate to the loading operation:
Bucket capacity of shovel: 15 m
Shovel cycle time: 44 s
Bucket fill factor: 0.85
Bulk density of the muck: 3.00 tonne/m
The minimum number of shovels required to achieve the production is
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A set of tubs is pulled by a 15 tonne diesel locomotive at a gradient of 1 in 100 with an acceleration of 0.05 m/s
. The coefficient of adhesion between the wheel and the track is 0.2 and the frictional resistance coefficient is 0.01. The maximum mass, in tonne, the locomotive can pull (rounded off to one decimal place) isLog in to check the answer
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A pump delivers 3000 liter of water in 2.0 minutes through a pipe of length 1000 m laid on a gradient of 1 in 10. The combined efficiency of pump and motor is 70%. If friction and shock losses are negligible, the input power to the motor in kW (rounded off to one decimal place) is
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A sand water slurry of specific gravity 1.45 contains sand of grain density 2.6 g/cc. The weight percent of sand in the slurry (rounded off to two decimal places) is
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Water enters a sump having the shape of an inverted frustum at a rate of 500 m
/h. The sump is initially filled up to 2.0 m height. The time taken in days to fill the remaining part of the sump (rounded off to one decimal places) is 
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Ward-Leonard system is provided in the winding system in order to restrict
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The equipment NOT related to extraction of coal from longwall face operation is
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Open questionMNNAT1 markNeeds review
For the conveyor belt drive shown, the tension on the tight side (
) is double that of the slack side. The coefficient of friction between belt and drum is 0.21. The minimum angle of lap (in degree) to avoid slippage of the belt is ____________.
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In a sublevel stope, 20 m high excavation is made with ring drilling in a 6 m wide orebody. In an effective shift time of 6 hrs, three rings are blasted resulting in 9 m extraction length. LHDs of 5.0
bucket capacity and cycle time of 5 minutes are used for ore transportation. The number of LHDs required for this operation is _________________.Log in to check the answer
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