GATE MN format:nat PYQs & Answers — Page 21 — Exam Papers

Questions 201–210 of 300. Imported answers require independent review unless marked reviewed.

Topic practice 300 questionsPage 21 of 30

For a development heading, the blasting parameters are

Cross-section: 6.0 m × 5.0 m Total number of holes: 72 Number of trimmer holes: 30 Depth of each hole: 3.5 m Charge per hole (except trimmers): 3.5 kg Charge per trimmer hole: 1.8 kg Pull per round: 90% of hole depth

The powder factor for the development round in m

/kg is ________ (round off to 2 decimal places).

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The following figure represents the observations from the level survey of an underground gallery.

Diagram for Mining Engineering question 48

If the reduced level of station A is 100.0 m, the reduced level of station D in m is ________ (round off to 1 decimal place).

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A tacheometer was set up at station P and the following readings were taken at two stations A and B with the staff held vertical and the line of sight horizontal.

Line	Bearing	Staff intercept
PA	210°	1.2 m
PB	135°	1.4 m

The additive and multiplying constants of the tacheometer are 0 and 100, respectively. The length of AB in m is ________ (round off to 1 decimal place).

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

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).

Diagram for Mining Engineering question 50

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

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).

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

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).

Diagram for Mining Engineering question 52

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

An assignment problem is given below with the cost of assignment as shown.

Group	T1	T2	T3	T4
G1	6	10	5	4
G2	4	100	6	4
G3	6	9	6	2
G4	3	7	6	4

If only one task can be assigned to one group, the minimum cost of assignment is ________.

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A vertical stope 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 stope block is 2.0 m. The tonnage factors are 3.0 tonne/m

for ore and 2.5 tonne/m

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).

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

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 shown.

Diagram for Mining Engineering question 55

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

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

If the time to failure of a machine component is exponentially distributed, the reliability of the same at Mean Time To Failure (MTTF), (rounded off to three decimal places), is __________.

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer