Mn:mining Engineering Worksheet - 2013 Page 7
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
152013
MINING ENGG. –MN
Q. 26 to Q. 55 carry two marks each.
Q.26
For a shrinkage stope the following data values are given
Insitu tonnage
9000 tonne
Insitu grade
5.2 g/tonne
Average grade of waste
1.4 g/tonne
Loss of ore in the stope
10%
Dilution
20%
The grade at the mill-head in g/tonne is ________
Q.27
In an experiment to determine specific gravity of a soil sample, the following data is obtained:
Mass of empty pycnometer
20.4 g
Mass of pycnometer with soil sample
51.6 g
Mass of pycnometer with soil sample filled with water
88.6 g
Mass of pycnometer filled with water
70.4 g
The specific gravity of the sample is __________
Q.28
A cylindrical rock specimen of diameter 54 mm has Young’s modulus of 68.97 GPa and Poisson’s
ratio of 0.35. The rock specimen fails in uniaxial compression at a lateral strain of 0.01%. The axial
load at failure in kN is __________
Q.29
An open belt drive connects two pulleys on parallel shafts that are 3.6 m apart as shown in the
figure. The diameters of the pulleys are 2.4 m and 1.6 m. The angle of contact on the smaller pulley
in degrees is __________
3.6m
Q.30
A two tonne mine car is released from the top of an incline at a height of 3 m as shown in the
figure. The mine car travels 45 m along the inclined track and another 85 m along the horizontal
track before coming to rest.
3.0 m
85.0 m
The specific rolling resistance of the car in N/tonne is ____________
MN
7/15
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Business