Which of the following are percussion drills? (i) Shot drill (ii) Diamond drill (iii) Wagon drill (iv) Churn drill Options: A . &nbsp(i) and (ii) are correct B . &nbsp(iii) and (iv) are correct C . &nbsp(i) and (iv) are correct D . &nbsp(ii) and (iii) are correct

Which of the following are percussion drills? (i) Shot drill (ii) Diamond drill

Question

Which of the following are percussion drills? (i) Shot drill (ii) Diamond drill (iii) Wagon drill (iv) Churn drill

Options:

A . (i) and (ii) are correct

B . (iii) and (iv) are correct

C . (i) and (iv) are correct

D . (ii) and (iii) are correct

Answer: Option B

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Question 1. Which of the following lining material is useful for shield driven tunnels in sub aqueous regions?....

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Question 3. Drifters can be used to drill....

Question 4. The tunnels, the artificial underground passages are constructed for:....

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Question 8. Circular section of tunnels is not suitable for....

Question 9. The most commonly adopted pattern of cut holes is:....

Question 10. Which one of the following methods of tunnelling does not require the use of time bearing?....

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