Mining Engineering Gate Yearwise 


Mining Engineering Gate 2020 Questions with Answer

Ques 53 GATE 2020

The geometry of a simple planar curve (ADB) is shown below. The value of the mid-ordinate of the curve in m is __________. (round off to 1 decimal place).


(248.0) is the correct answer.

Ques 54 GATE 2020

A vertical stoping block of length 60.0 m, height 40.0 m, and average width 1.5 m has sharp boundary walls. However, the mining width of the stoping block is 2.0 m. The tonnage factors are 3.0 tonne/m3 for ore and 2.5 tonne/m3 for wall rocks. The average grade of ore is 10.0%. The overall grade of ore mined on account of dilution in percentage is ________.(round off to 2 decimal places).


(7.70) is the correct answer.

Ques 55 GATE 2020

A bauxite ore body has four boreholes as shown below. For each borehole, the grade of alumina, the thickness of the ore body, and the triangular area of influence are as shown.

The average grade of ore body in the region ABCD in percentage is (round off to 1 decimal place).


(30.8) is the correct answer.

Ques 56 GATE 2020

For the electric delay detonator shown in the figure, the components P, Q and R. respectively, are

A

fuse head, delay element, priming charge

B

fuse head, priming charge, delay element

C

priming charge, delay element, fuse head

D

delay element, fuse head, priming charge


(a) is the correct answer.

Ques 57 GATE 2020

Match the following safety arrangements for a surface-to-underground shaft hoist with their corresponding safety functions.

A

P-1, Q-2, R-3

B

P-3, Q-1, R-2

C

P-2, Q-3, R-1

D

P-1, Q-3, R-2


(d) is the correct answer.

Ques 58 GATE 2020

The fore bearings and back bearings of the lines of an open compass traverse are given below.

The stations that are free from local attraction are

A

P and Q

B

Q and R

C

R and S

D

S and T


(b) is the correct answer.

Ques 59 GATE 2020

The plane stress condition is given by

A

εzz=0, γyz=0, γzx=0

B

σzz=0 τyz=0 τzx=0

C

σzz≠0, τyz≠0, τzx≠0

D

εzz≠0, γyz≠0, γzx≠0


(b) is the correct answer.

Ques 60 GATE 2020

Match the following metals with their corresponding minerals.

A

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

B

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

C

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

D

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


(c) is the correct answer.

Ques 61 GATE 2020

Match the wire rope types with their corresponding cross-sectional diagrams.

A

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

B

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

C

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

D

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


(a) is the correct answer.

Ques 62 GATE 2020

The 'ratchet and pawl' mechanism in a jack hammer drill

A

forces down the piston.

B

provides a twisting force to the drill steel.

C

engages rifle bar with rifle nut.

D

prevents reverse rotation of rifle bar.


(d) is the correct answer.

Ques 63 GATE 2020

Post-pillar method of stoping is a variant of

A

cut and fill stoping.

B

sublevel stoping.

C

vertical crater retreat method.

D

sublevel caving.


(a) is the correct answer.

Ques 64 GATE 2020

Cross-measure borehole method is used for

A

rock slope monitoring.

B

methane drainage.

C

connecting two drifts.

D

subsidence monitoring.


(b) is the correct answer.

Ques 65 GATE 2020

The dry and wet bulb temperatures at the inlet of the airstream are 30°C and 25°C respectively. The corresponding values at the outlet of the airstream are 26°C and 25°C, respectively. The psychrometric process that occurs in the airstream is described as

A

latent cooling

B

sensible cooling

C

condensation

D

evaporative cooling


(d) is the correct answer.

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