Mining Engineering Gate Yearwise 


Mining Engineering Gate 2020 Questions with Answer

Ques 27 GATE 2020

A steel cube of side 50 mm is subjected to a uniform pressure of 200 MPa acting on each face. The Young's modulus and Poisson's ratio of the material are 200 GPa and 0.25, respectively. The decrease in the side of the cube in mm is _________.(round off to 3 decimal places).


(0.020) is the correct answer.

Ques 28 GATE 2020

In the figure shown below, the friction coefficient between the block and the inclined plane is 0.2, and all the pulleys are weightless. The weight of the block is 10 N. The minimum force P in Newtons that is needed to slide the block up the inclined plane is __________. (round off to 2 decimal places).


(67.00) is the correct answer.

Ques 29 GATE 2020

For a mixture of inflammable gases, the lower and upper explosibility limits can be computed using

A

Dalton's law

B

Graham's law

C

Le Chatelier relation

D

Boyle's law


(c) is the correct answer.

Ques 30 GATE 2020

The code for the lowest category of mineral resources under United Nations Framework Classification (UNFC) system is

A

444

B

123

C

334

D

111


(d) is the correct answer.

Ques 31 GATE 2020

Match the following sampling patterns with the corresponding sampling types.

A

P-1.O-3,R-2,S-4

B

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

C

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

D

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


(b) is the correct answer.

Ques 32 GATE 2020

In the context of gas testing using flame safety lamp, the correct statement is

A

Each accumulation test has to be necessarily followed by percentage test.

B

Accumulation test is always done after percentage test.

C

Either percentage test or accumulation test can be done first.

D

Percentage test is done only in the event of accumulation test giving negative result.


(d) is the correct answer.

Ques 33 GATE 2020

A rock sample has coefficient of thermal diffusivity 1.282×10-6 m2/s. specific heat 900 J/(kg°C) and density 2600 kg/m3. The coefficient of thermal conductivity of the rock sample in W/(m°C) is _________. (round off to 1 decimal place).


(2.9) is the correct answer.

Ques 34 GATE 2020

Rock strata has unit weight of 25 kN/m3 and Poisson's ratio 1/3. At a depth of 200 m, the horizontal stress in MPa is ________. (round off to 1 decimal place).


(2.4) is the correct answer.

Ques 35 GATE 2020

A shovel of bucket capacity 4.2 m3 makes 900 passes per day with a fill factor of 0.8. If the swell factor of the rock is 1.4, then in-situ volume handled by the shovel in a month of 24 working days in m3 is _________. (round off to 1 decimal place).


(51830.0) is the correct answer.

Ques 36 GATE 2020

A cylindrical sample of granular material has the following measurements:
Length: 10 cm
Diameter: 5 cm
Weight: 350 g
Assume the sample is completely dry with specific gravity of solid grains 2.8. The void ratio of the sample is _________. (round off to 3 decimal places).


(0.560) is the correct answer.

Ques 37 GATE 2020

The following consecutive readings were taken at uniform intervals with a level and a levelling staff on continuously sloping ground.
0.405. 1.035, 1.654, 0.240. 0.615, 1.125, 0.800, 1.125
The number of change points is __________.


(2) is the correct answer.

Ques 38 GATE 2020

The cost of a slurry pump is Rs. 50,000 and it has an estimated life of 7 years. If the salvage value is Rs. 8,000, the annual depreciation following straight-line depreciation method, in Rupees, is _________. (round off to 1 decimal place).


(5990.0) is the correct answer.

Ques 39 GATE 2020

An explosive mixture has 80 g of ammonium nitrate (NH4NO3) and 14 g of fuel oil (C10H20). The oxygen balance in the mixture is

A

surplus by 32 g

B

deficient by 24 g

C

surplus by 16 g

D

deficient by 32 g


(d) is the correct answer.

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