MINING ENGINEERING

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HERE THE QUESTIONS FOR YOU MINING ENGINEERS   (Q1  to Q10) AND 

(ANSWERS ARE BELOW THE QUESTIONS)  

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Q1) 

The life of the M.S pipe used in sand stowing is......lac ton of sand?

1)  4

2)  6

3)  8

4)  10

 

Q2)

Which portion of pipe damaged more in sand stowing?

1)  upper portion

2)  middle portion

3)  2/3 from the top

4)  lower portion

 

 

Q3)

The upper portion of the sand stowing pipe is generally changed after the transport of ....lac ton of sand?

1)  1 - 2

2)  2 - 4

3)  4 - 6

4)  6 - 8 

Q4)

In sand stowing incorrect profile will effect..?

1)  cavitaiton

2)  wear on pipes

3)  setup pulsation

4)  jamming

Q5)

In sand stowing high local velocity of sand results?

1)  cavitaiton

2)  wear on pipes

3)  setup pulsation

4)  jamming

Q6)

In hydraulic sand stowing the H/L ratio for reasonably good stowing rate?

1)  1:5

2)  1:6

3)  7:1

4)  1:7

Q7)

In hydraulic sand stowing the pipe end should away from the dip of the boxing is ?

1)  5 m

2)  6.5m

3)  7.5 m

4)  9m

Q8)

In hydraulic sand stowing the throw of the sand without nozzle is ...m and with nozzle is ...m?

1)  2 ; 6

2)  3 ; 7

3)  4 ; 8

4)  5 ; 9

Q9) 

To stop the stowing which is done to avoid the jamming of the pipe ?

1)  water should be stopped first

2)  sand should be stopped first

3)  both should be stop at a time

4)  none of the above 

Q10)

For deeper mines the sand:water ratio in sand stowing is?

1)  1:1

2)  1:3

3)  3:1

4)  1:1.3

ANSWERS FOR ABOVE QUESTIONS 

Q1)  2   Q2)  1    Q3)  2     Q4)   1  Q5)  2     

Q6)  4   Q7)  3    Q8)  2  Q9)   2   Q10)    4 

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