GATE MN year:2025 PYQs & Answers — Page 5

Questions 41–50 of 65. Imported answers require independent review unless marked reviewed.

Topic practice 65 questionsPage 5 of 7

Based on the theodolite survey for a closed traverse PQRS, the following bearings are observed for the sides of the traverse.

Line	Fore bearing
PQ	60°30′
QR	105°30′
RS	220°30′
SP	310°30′

The interior angles at P and R respectively are

Your answerChoose one option.

45°00′, 115°00′

70°00′, 65°00′

135°00′, 90°00′

250°00′, 115°00′

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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 constant feed of 400 mL/s is maintained by a Xanthe column of height H as shown in the figure. The outlet cross section area is

. The acceleration due to gravity is 10 m/s². Neglecting friction and other losses, the value of H, in cm, is ____ (rounded off to 2 decimal places)

Diagram for Mining Engineering question 43

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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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In a sublevel stope, a ringhole blast round is designed for winning 2500 tonne of ore with 8.0 % metal content. The blast results into breakage of 90.0 % of the design blast round. Overbreak of 250 tonne wallrock with 0.5 % metal content dilutes the blasted ore. The total metal content, in tonne, considering 95 % recovery of the blasted muck from the stope, is _______ (rounded off to 2 decimal places)

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In a surface mine, blasting is carried out using electronic detonator and cartridge emulsion explosive with following details:

Burden = 3.5 m

Spacing = 4.5 m

Bench height = 10.0 m

Subgrade drilling = 1.0 m

Stemming = 4.0 m

Linear charge concentration = 16 kg/m

Cost of one detonator = Rs. 800

Cost of explosive = Rs. 30/kg

The cost of blasting material per cubic meter of blasted rock, in Rs., is ______ (rounded off to 2 decimal places).

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A pit slope has the following information:

Number of benches = 5

Height of each bench = 8 m

Bench slope angle = 70 degree

If width of one bench is 24 m and that of other four benches is 10 m each, the overall pit slope angle, in degree, 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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A mine void of dimension 100.0 m x 2.0 m x 1.2 m is to be filled in 3 hours by hydraulic stowing. The sand to slurry ratio is 0.4. If the hydraulic fill factor is 0.9, the hourly consumption of water for the operation, in m^3, is____ (rounded off to 2 decimal places).

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A 2.5 tonne diesel locomotive hauls 5 mine cars upslope having a gradient of 1 in 20. The constant tractive force of the locomotive is 1800 kN. The gross weight of a car is 3 tonne. Acceleration due to gravity is 10.0 m/s^2. If the acceleration of the system is 0.5 m/s^2, the rolling resistance in kN/tonne is______ (rounded off to 3 decimal places).

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GATE MN year:2025 PYQs

Question 41

Question 42

Question 43

Question 44

Question 45

Question 46

Question 47

Question 48

Question 49

Question 50