Mining Engineering Gate Yearwise 


Mining Engineering Gate 2019 Questions with Answer

Ques 40 GATE 2019

In a slake durability test, mass of the drum with samples before the test and mass of the drum with oven-dried samples after the test are 1.52 kg and 1.48 kg respectively. If the mass of the drum is 1.05 kg, slake durability index in percentage (rounded off to two decimal places) is _________.


(91.00) is the correct answer.

Ques 41 GATE 2019

The ionic concentration of a mine water sample with pH close to 7.0 is given below. The alkalinity of the water expressed as equivalent CaCO3, in mg/1, (rounded off to two decimal places) is ___________.


(131.10) is the correct answer.

Ques 42 GATE 2019

Water is pumped through a steel pipe of diameter 200 mm at a flow rate of 30 1/s. If the dynamic viscosity of water is 10-3 Pa.s, the Reynolds number of the flow is

A

2.83×103

B

2.83×104

C

1.91×105

D

1.91×106


(c) is the correct answer.

Ques 43 GATE 2019

Match the following based on the equipment usage in a comminution circuit:

A

P-1, Q-4, R-2, S-3

B

P-1, Q-2, R-3, S-4

C

P-4, Q-1, R-2, S-3

D

P-3, Q-1, R-4, S-2


(c) is the correct answer.

Ques 44 GATE 2019

Match the following for coal mining operation:

A

P-C-1, Q-D-3, R-A-2, S-B-4

B

P-C-1, Q-A-3, R-B-4, S-D-2

C

P-C-1, Q-A-4, R-B-3, S-D-2

D

P-B-3, Q-C-2, R-A-1, S-D-4


(b) is the correct answer.

Ques 45 GATE 2019

In the context of mine planning, match the following:

A

P-4, Q-3, R-2, S-1

B

P-1, Q-2, R-3, S-4

C

P-1, Q-4, R-2, S-3

D

P-3, Q-2, R-4, S-1


(a) is the correct answer.

Ques 46 GATE 2019

The figures shown represent the analysis of gas samples collected from a sealed off area in a coal mine over a period of time. The best representation of the progressive change of gaseous environment inside the sealed-off area is

A

Figure P

B

Figure Q

C

Figure R

D

Figure S


(d) is the correct answer.

Ques 47 GATE 2019

The net annual cash flows for two small scale mining projects A and B are given below. The correct decision assuming 10% discount rate as per NPV criterion is

A

Project A is accepted but project B is rejected

B

Projects A and B both are rejected

C

Project A is rejected but project B is accepted

D

Projects A and B are both accepted but project A is better than project B


(d) is the correct answer.

Ques 48 GATE 2019

Match the following features with the mining methods:

A

P-2, Q-4, R-3, S-1

B

P-4, Q-3, R-2, S-1

C

P-2, Q-4, R-1, S-3

D

P-4, Q-3, R-1, S-2


(c) is the correct answer.

Ques 49 GATE 2019

A double ended ranging drum shearer operates in a longwall retreating panel. The following data are provided

Method of cutting is unidirectional and each shift requires a non-operational time of 2.0 hours. The production per day in tonne (rounded off to one decimal place) is


(2450.1) is the correct answer.

Ques 50 GATE 2019

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 operations:

The minimum number of shovels required to achieve the production is _________.


(4) is the correct answer.

Ques 51 GATE 2019

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/s2 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) is ________.


(102.5) is the correct answer.

Ques 52 GATE 2019

The characteristic curves of two mine fans installed in series in a fan drift are P=2000 6Q-0.2Q2 and P=3000-8Q-0.2Q2 where P is pressure in Pa and Q is quantity in m3/s. If the mine quantity is 70 m3/s, the mine resistance, in Ns2m-8, (rounded off to two decimal places) is _________.


(0.40) is the correct answer.

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