Mining Engineering
GATE MN format:nat PYQs
Build your understanding with focused practice from past exam papers.
Questions 151–160 of 300. Imported answers require independent review unless marked reviewed.
Question 64
Open questionMNNAT2 marksNeeds review
A mine has a reserve of 150 million tonne (Mt) and is designed for a maximum production capacity of 5 Mt per year. In the first year the production is 2 Mt and it increases by 20% each year. The reserve in Mt that remains at the end of 15 years, is ______. (round off to two decimal places)
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Information on Activity-Time duration of a project is provided below
Activity | Predecessor event | Successor event | Pessimistic | Most likely | Optimistic |
|---|---|---|---|---|---|
A | 1 | 2 | 20 | 15 | 4 |
B | 1 | 3 | 12 | 8 | 4 |
C | 2 | 3 | 16 | 11 | 6 |
D | 3 | 4 | 20 | 13 | 12 |
E | 2 | 4 | 13 | 8 | 3 |
F | 1 | 4 | 45 | 35 | 25 |
The expected project duration in weeks, is ______. (in integer)
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A coal sample having moisture content of 8.0% has unit weight 15.6 kN/m³. The dry unit weight of the sample, in kN/m³ is _____. [round off to 2 decimal places]
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The value of the integral
computed using Simpson’s 1/3 rule with 2 subintervals is ________. [round off to 3 decimal places]Log in to check the answer
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In the context of sound frequency analysis, the lower and upper frequencies of a 1/1 octave band are 710 Hz and 1420 Hz respectively. The corresponding centre frequency of the band in Hz, is______. [round off to the nearest integer]
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In Batte Environmental Evaluation System (BEES) of Environment Impact Assessment (EIA), “air pollution” has a Parameter Importance Unit (PIU) value of 52. The Environment Quality (EQ) score of a project with respect to air pollution was 0.8 before the project implementation and it becomes 0.6 after the project implementation. The difference in the “Environmental Impact Unit” (EIU), before and after the project implementation is ______. [round off to 2 decimal places]
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A system consists of four components connected functionally in a parallel configuration. The reliability of the individual components is 0.40, 0.60, 0.50 and 0.40. The system reliability, is________. [round off to 3 decimal places]
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A vehicle is moving at a speed of 12 m/s on a level road. It applies emergency brakes and starts to skid without rolling in a straight path. The deceleration of the vehicle is constant after braking and it comes to rest at a distance of 15 m. Assuming,
m/s², the coefficient of kinetic friction between the tyres and road is ________. [round off to 2 decimal places]Log in to check the answer
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Production plan of a small quarry having 3 years of life is shown in the figure.
The following information of revenue and cost data are available. Ore: 3.0 million tonne each year; waste: 5.0 million m³ in the 1st year, 5.5 million m³ in the 2nd year, and 5.0 million m³ in the 3rd year. Selling price of ore = Rs. 150/tonne. Ore mining cost = Rs. 500/tonne. Waste mining cost = Rs. 500/m³. Initial capital = Rs. 1000 million. Discount rate = 10%. By neglecting depreciation, salvage value and corporate tax, the NPV of the mining project, in million Rs., is ______. [round off to 2 decimal places]
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A triangular distributed load is applied on top of a beam as shown in the figure.
The value of maximum bending moment in kN-m is ______. [round off to 2 decimal places]
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