Mining Engineering Gate Yearwise 


Mining Engineering Gate 2023 Questions with Answer

Ques 53 GATE 2023

An unmanned aerial vehicle (UAV) with payload of 2 kg reaches vertically 100 m in 10 s at uniform velocity. The self-weight of the UAV is 1.2 kg. The power required in lifting in kW is [rounded off to 2 decimal places]


(3.14) is the correct answer.

Ques 54 GATE 2023

An irregular shaped rock sample of mass 60 g displaces 27 g of brine when submerged in a filled jar. The specific gravity of brine is 1.05. The unit weight of the rock sample in kN/m3 is [rounded off to 2 decimal places]


(65.45) is the correct answer.

Ques 55 GATE 2023

The reliability function of a pump is given as R(t)=exp[-(t/1000)0.5], where t The reliability function of a pump is given as stands for time in years. If the pump comes with a six-month warranty, the number of years for the pump to attain a reliability of 0.9 is [rounded off to 2 decimal places]


(8.82) is the correct answer.

Ques 56 GATE 2023

In a sample of groundwater, the concentration of Ca2+ is 200 mg/l. The corresponding calcium carbonate hardness in mg/l is [rounded off to 1 decimal place]


(500.0) is the correct answer.

Ques 57 GATE 2023

A thermal power station receives coal of calorific value 4000 kcal/kg and uses 7000 tonnes of coal every day. Assuming 860 kcal is the heat equivalent of 1.0 kWh, for a thermal efficiency of 40% and electrical efficiency of 85% the power generation per day in MWh is ________. [rounded off to 1 decimal place ]


(11360.5) is the correct answer.

Ques 58 GATE 2023

A coal company has three mines which transport coal to four washeries. The daily production from each mine, the demand at each washery and unit transportation cost from each mine to each washery are given in table

The cost of initial basic feasible solution using Vogel's approximation method is _______. [rounded off to 1 decimal place]


(18900.0) is the correct answer.

Ques 59 GATE 2023

The time between consecutive accidents in days in an underground coal mine in a year are as follows
10, 15, 6, 18, 12, 14, 16, 9, 21, 15, 26, 18, 22, 25, 13
Assuming exponential distribution, the probability that there will be no accident over a 10-day period is [rounded off to 2 decimal places]


(0.41) is the correct answer.

Ques 60 GATE 2023

A surface mine blast pattern has spacing 4 m and burden 3 m. The diameter of the drill hole is 110 mm. The drilling length is 8.8 m including subgrade of 10%. The bulk explosive density is 900 kg/m3.
If the powder factor is 2.5 m3/kg, the charge length in m is [rounded off to 2 decimal places]


(6.40) is the correct answer.

Ques 61 GATE 2023

A mining company makes an initial investment of Rs 200 crore on a project.

By ignoring any other cash-flows, if the NPV of the project becomes Rs. 5.367 crore, the gestation period of the project, in years, is [rounded off to the nearest integer]


(1) is the correct answer.

Ques 62 GATE 2023

A rock slope is intercepted by a joint plane at an angle 30° as shown in figure.

The following data are available: Unit weight of the rock: 20 kN/m3 Cohesion of joint: 30 kPa Friction angle of joint: 22° The factor of safety of the rock slope to slide along the joint plane is [rounded off to 2 decimal places]


(1.84) is the correct answer.

Ques 63 GATE 2023

A mine void of width 20 m, length 50 m and height 30 m is to be filled with mill tailings based cemented paste backfill (CPB). The CPB contains tailings:cement: water as 1.0:0.1:0.2 by weight. The specific gravity of tailings and cement are 2.8 and 2.4 respectively. Assuming 20% of the original volume of water is retained in the final backfill, the amount of cement in tonne required so as to fill the void completely is ________. [rounded off to nearest integer]


(3077) is the correct answer.

Ques 64 GATE 2023

A fan installed in a mine ventilation system circulates 30 m3/s of air to two districts A and B as shown in Figure below. It is desired to increase the quantity of air by 20% in the district B using a booster fan in it. Assuming that the main fan pressure is unchanged, the pressure of the booster fan, in Pa, is ____________. [rounded off to 2 decimal places]


(138.24) is the correct answer.

Ques 65 GATE 2023

Data related to a water turbine pump with backward bladed impellers are given below:

The number of impellers required in the pump to lift water by a height 300 m is [rounded off to higher integer]


(10) is the correct answer.

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