Mining Engineering Gate Yearwise 


Mining Engineering Gate 2017 Questions with Answer

Ques 14 GATE 2017

Two machines M1 and M2 are able to execute any of four jobs P, Q, R and S. The machines can perform one job on one object at a time. Jobs P, Q, R and S take 30 minutes, 20 minutes, 60 minutes and 15 minutes each respectively. There are 10 objects each requiring exactly 1 job. Job P is to be performed on 2 objects, Job Q on 3 objects, Job R on 1 object and Job S on 4 objects. What is the minimum time needed to complete all the jobs?

A

2 hours

B

2.5 hours

C

3 hours

D

3.5 hours


(a) is the correct answer.

Ques 15 GATE 2017

The bar graph below shows the output of five carpenters over one month, each of whom made different items of furniture: chairs, tables, and beds.

Consider the following statements.
i. The number of beds made by carpenter C2 is exactly the same as the number of tables made by carpenter C3.
ii. The total number of chairs made by all carpenters is less than the total number of tables.
Which one of the following is true?

A

Only i

B

Only ii

C

Both i and ii

D

Neither i nor ii


(c) is the correct answer.

Ques 16 GATE 2017

In a PERT network, the "time estimates" of an activity are the following: Optimistic time - 2 days, Most likely time - 4 days, and Pessimistic time - 12 days. The expected time and standard deviation of the activity in days are respectively

A

6.0 and 2.78

B

5.0 and 1.66

C

6.0 and 1.66

D

5.0 and 2.78


(b) is the correct answer.

Ques 17 GATE 2017

Components of a 2-D stress tensor in Cartesian coordinate are σxx=5.0 MPa, σyy=-10.0 MPa, and τxy=2.0 MPa. The traction vector (T→) in MPa acting on a plane having outward normal n^=(√3/2)i^-(1/2)j^ is

A

T→=3.33i^-6.73j^

B

T→=3.33i^+6.73j^

C

T→=1.73i^-6.73j^

D

T→=1.73i^+6.73j^


(a) is the correct answer.

Ques 18 GATE 2017

A multi-point borehole extensometer is used to monitor

A

convergence between the roof and the floor

B

strain between fixed points along a borehole

C

strain between the anchor point and the reference point on the surface

D

changing distances between fixed points along a borehole


(d) is the correct answer.

Ques 19 GATE 2017

The failure load of a point load test specimen having diameter 45 mm is 6000 N. The uncorrected point load index in MPa is ________.


(2.9 to 3.0) is the correct answer.

Ques 20 GATE 2017

Minerals A and B are produced from a deposit. Minerals A and B will be called coproducts if

A

economics of mining depends upon the extraction of either mineral A or B

B

economics of mining depends upon the extraction of both the minerals A and B

C

mineral B is produced economically and mineral A is an additional benefit

D

minerals A and B are produced in equal quantity


(b) is the correct answer.

Ques 21 GATE 2017

Semi-variogram modeling is used for reserve estimation of mineral deposit by

A

polygonal method

B

distance weighting method

C

geostatistical method

D

nearest neighbor method


(c) is the correct answer.

Ques 22 GATE 2017

Which one of the following does NOT belong to the direct operating cost of a mine?

A

Administrative cost

B

Royalty

C

Fuel cost

D

Explosive cost


(a) is the correct answer.

Ques 23 GATE 2017

Lane's algorithm is applied to determine

A

mill cut-off grade

B

mine production rate

C

operating cost

D

ultimate pit


(a) is the correct answer.

Ques 24 GATE 2017

In an underground coal mine a driller, wearing personal protective equipment, was going to workplace along the travelling roadway. A piece of rock fell down from the roof and hit the person on head causing serious injury. The cause of accident is

A

unsafe act of the driller

B

job stress

C

unsafe act and unsafe condition

D

unsafe condition


(d) is the correct answer.

Ques 25 GATE 2017

The magnetic bearing of a line is 65°30'. If the declination is 4°30'W the true bearing of the line in degrees is


(60 to 62) is the correct answer.

Ques 26 GATE 2017

A vertical photograph of a 40 m high hill is taken from 4.4 km height. If the focal length of the camera is 15 cm, the scale of the photograph is

A

1 in 29067

B

1 in 7267

C

1 in 29050

D

1 in 9688


(a) is the correct answer.

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