What topics are covered on Page 5 of GATE 2026 Mining Engineering questions?

Page 5 contains the final Questions 53 to 65. Topics include biochemical oxygen demand, silo loading, turbine pumps, dragline productivity, blasting vibration, cut-and-fill stoping, longwall AFC design, bord-and-pillar depillaring, strain gauges, underwater blasting, circular curves, correlation surveying and tacheometry.

What is the BOD of the wastewater sample in GATE 2026 Mining Engineering?

For the 15 mL wastewater sample diluted to 300 mL with dissolved oxygen decreasing from 9.2 to 4.4 mg/L over five days, the BOD is 96 mg/L.

What is the output of the dragline in GATE 2026 Mining Engineering?

For the 20 cubic metre bucket, 0.9 fill factor, specified cycle times and 90 percent utilization, the dragline output is 940.6 cubic metres per hour.

What is the peak particle velocity in the bench blasting question?

Using the specified blast delays, explosive charge and scale-distance relationship, the peak particle velocity at 100 m is 7.79 mm/s.

What daily production is required to depillar the panel within the incubation period?

For the 24-pillar bord-and-pillar panel, 80 percent extraction ratio and six-month incubation period, the minimum required production rate is 860.2 tonnes per day.

What is the apex distance of the circular curve in GATE 2026 Mining Engineering?

For a circular curve with radius 1000 m and deflection angle of 60 degrees, the apex distance is 154.701 m.

What is the reduced level of station R in the GATE 2026 tacheometry question?

Using the specified tacheometer constants, staff readings and vertical angles, the reduced level of station R is 84.68 m.

Mining Engineering Gate 2026 Questions with Answer

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Ques 53 GATE 2026

In a biochemical oxygen demand (BOD) test, 15 ml of wastewater sample was diluted with distilled water to completely fill a 300 ml BOD bottle and incubated at 20 °C for 5 days. The dissolved oxygen (DO) level before and after incubation are 9.2 mg liter^-1 and 4.4 mg liter^-1, respectively. The BOD of the sample, in mg liter^-1, is _______________. (answer in integer)

(96) is the correct answer.

Ques 54 GATE 2026

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)

(3648) is the correct answer.

Ques 55 GATE 2026

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)

(27.69) is the correct answer.

Ques 56 GATE 2026

The information for a dragline operation is given:
Bucket capacity: 20 m³
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 m³ h^-1, is _________. (rounded off to one decimal place)

(940.6) is the correct answer.

Ques 57 GATE 2026

In a bench blasting, as shown, 49 kg of explosive is put in each hole. The detonation time of holes, in millisecond, and the associated scale distance (SD) vs. peak particle velocity (PPV) plot for the given blast pattern is shown, with PPV = 250(SD)^-1.5. Hole delay pattern: front row at 0, 25, 50, 75 ms; back row at 50, 75, 100 ms. The PPV at a distance of 100 m, in mm s^-1, is ___________. (rounded off to two decimal places)

(7.79) is the correct answer.

Ques 58 GATE 2026

A regular shaped cut and fill stope is shown. Pillars of size 4 m × 4 m are left at an interval of 13 m along the length of the stope (255 m long, 6.0 m wide). If the density of the mined ore is 2.5 tonne m^-3, and slices are extracted to the full stope width, the total tonnage of ore recovered from the 1^st slice (4.8 m thick) of the stope is ___________ ×10³. (rounded off to one decimal place)

(14.7) is the correct answer.

Ques 59 GATE 2026

A coal seam of 2.4 m thickness is mined with a DERD shearer at a cutting speed of 0.6 km h^-1. 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 m². For the evacuation of cut coal from the face with 10% spillage, the required minimum velocity of the AFC, in m s^-1, is _______________. (rounded off to two decimal places)

(0.92) is the correct answer.

Ques 60 GATE 2026

A bord and pillar panel has 24 developed pillars of size 40 m × 40 m (centre to centre) under extraction. The following information is given:
Gallery width = 4 m
Extraction height = 3 m
Extraction ratio during depillaring = 80%
Specific gravity of coal = 1.4
Incubation period = 6 months
Average working days per month = 25
In order to extract the panel within the incubation period, the minimum rate of production, in tonne per day, is _______________. (rounded off to one decimal place)

(860.2) is the correct answer.

Ques 61 GATE 2026

In a uniaxial compressive strength test, a 120 Ω strain gauge of gauge factor 2.0 is pasted on the rock sample of length 110 mm as shown. At the end of the test, the change in resistance of the strain gauge is 0.5 Ω. The longitudinal deformation of the sample, in mm, is _______________. (rounded off to two decimal places)

(0.23) is the correct answer.

Ques 62 GATE 2026

The best combination of explosive and initiation system for underwater blasting for rock breakage is

ANFO and electric detonator

emulsion and non-electric detonator

HANFO and safety fuse

PETN and electronic detonator

(d) is the correct answer.

Ques 63 GATE 2026

A circular curve having radius of curvature 1000 m is set out by connecting two straights with a deflection angle of 60°. The apex distance, in m, is ____________. (rounded off to three decimal places)

(154.701) is the correct answer.

Ques 64 GATE 2026

The observations from a correlation survey are shown. If the coordinates of points C and D are (East: 375 m, North: 1120 m) and (East: 376 m, North: 1121 m), respectively, the whole circle bearing of the line EF is
Given: CD = 3.0 m, CE = 4.2 m, ∠DEC = 1″, ∠DEF = 170°20′

215°19′59.6″

35°19′59.6″

215°20′1.4″

35°20′1.4″

Ques 65 GATE 2026

Following observations were taken using a Tacheometer with staff held vertical. The additive and multiplying constants of the instrument are 0 and 100, respectively. The reduced level (RL) of the staff station R, in m, is _______________. (rounded off to two decimal places)
Instrument station P, Staff station Q: Staff readings 1.4, 2.7, 3.9; Vertical angle 7°; RL of Q = 102 m
Instrument station P, Staff station R: Staff readings 2.1, 2.8, 3.6; Vertical angle 5°

(84.68) is the correct answer.

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