Mining Machinery MCQs Questions & Answers | Mining Engineering Page-2 section-1

11.
Ropes of stainless steel not used in . . . . . . . .

A. Wire ropes

B. Steel ropes

C. Haulage ropes

D. Loco rope

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12.
Figure shows a two pulley system for hoisting a load of 10 kN. The coefficient of friction between each pulley and the rope is 0.2. The vertical and horizontal distances between the centers of the pulleys are 25m and 16m respectively. The tensions T₁ and T₂ respectively in kN are

A. 6.00, 5.38

B. 12.37, 11.06

C. 18.74, 16.73

D. 25.11, 22.41

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13.
If the track gauge of underground haulage is 0.6m, radius of curve 2m, Velocity of train 2m/sec, then find out the amount of super elevation.

A. 0.02

B. 0.12

C. 0.22

D. 0.32

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14.
White metal temperature not exceeding °C during pouring.

A. 300

B. 365

C. 400

D. 355

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15.
A conveyor is 600m long carrying coal having bulk density 0.8 t/m³ up a gradient of 1 in 60 at the rate of 220 t/hr. If the belt width (w) is 0.75m and cross-sectional area of the material is 0.1w², determine belt speed?

A. 1.26 m/s

B. 1.36 m/s

C. 1.86 m/s

D. 2.26 m/s

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16.
A cage weighing 12000 kg is raised by four chains each making an angle of 30° with the vertical. The tension in each chain in kN is

A. 41

B. 34

C. 25

D. 20

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17.
In koepe winders, the power is transmitted through the friction between

A. Winding rope and lining of sheave

B. Winding rope and tail rope

C. Tail rope and skip

D. Drum and koepe winders

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18.
The object of normalising is to remove . . . . . . . .

A. Internal Strain

B. Strength

C. To reduce the size

D. None

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19.
Corrosion of the rope can be delayed by using . . . . . . . .

A. Steel rope

B. Galvanized rope

C. Non galvanized

D. All

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20.
It is the ratio between resistance to the motion of a car along a straight level track with constant speed to the total weight of car

A. Co-efficient of utilization of space

B. Co-efficient of resistance

C. Co-efficient of carrying capacity

D. Co-efficient of tractive effort

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Mining Machinery MCQs Questions & Answers | Mining Engineering

11. Ropes of stainless steel not used in . . . . . . . .

Answer & Solution

12. Figure shows a two pulley system for hoisting a load of 10 kN. The coefficient of friction between each pulley and the rope is 0.2. The vertical and horizontal distances between the centers of the pulleys are 25m and 16m respectively. The tensions T1 and T2 respectively in kN are

Answer & Solution

13. If the track gauge of underground haulage is 0.6m, radius of curve 2m, Velocity of train 2m/sec, then find out the amount of super elevation.

Answer & Solution

14. White metal temperature not exceeding °C during pouring.

Answer & Solution

15. A conveyor is 600m long carrying coal having bulk density 0.8 t/m3 up a gradient of 1 in 60 at the rate of 220 t/hr. If the belt width (w) is 0.75m and cross-sectional area of the material is 0.1w2, determine belt speed?

Answer & Solution

16. A cage weighing 12000 kg is raised by four chains each making an angle of 30° with the vertical. The tension in each chain in kN is

Answer & Solution

17. In koepe winders, the power is transmitted through the friction between

Answer & Solution

18. The object of normalising is to remove . . . . . . . .

Answer & Solution

19. Corrosion of the rope can be delayed by using . . . . . . . .

Answer & Solution

20. It is the ratio between resistance to the motion of a car along a straight level track with constant speed to the total weight of car

Answer & Solution

11.
Ropes of stainless steel not used in . . . . . . . .

12.
Figure shows a two pulley system for hoisting a load of 10 kN. The coefficient of friction between each pulley and the rope is 0.2. The vertical and horizontal distances between the centers of the pulleys are 25m and 16m respectively. The tensions T₁ and T₂ respectively in kN are

13.
If the track gauge of underground haulage is 0.6m, radius of curve 2m, Velocity of train 2m/sec, then find out the amount of super elevation.

14.
White metal temperature not exceeding °C during pouring.

15.
A conveyor is 600m long carrying coal having bulk density 0.8 t/m³ up a gradient of 1 in 60 at the rate of 220 t/hr. If the belt width (w) is 0.75m and cross-sectional area of the material is 0.1w², determine belt speed?

16.
A cage weighing 12000 kg is raised by four chains each making an angle of 30° with the vertical. The tension in each chain in kN is

17.
In koepe winders, the power is transmitted through the friction between

18.
The object of normalising is to remove . . . . . . . .

19.
Corrosion of the rope can be delayed by using . . . . . . . .

20.
It is the ratio between resistance to the motion of a car along a straight level track with constant speed to the total weight of car