(i) shot drill
(ii) diamond drill
(iii) wagon drill
(iv) churn drill
select correct answer?
A. (i) and (ii) are correct
B. (iii) and (iv) are coiTect
C. (i) and (iv) are correct
D. (ii) and (iii) are correct
Related Mcqs:
- Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?
A. stone masonry
B. timber
C. cast iron
D. cement concrete - Which one of the following tunnelling methods is used for laying under ground sewers ?
A. Needle beam method
B. Army method
C. German method
D. Italian method - Which of the following methods of tunneling is used for long tunnels at great depths ?
A. Army method
B. Needle beam method
C. Austrian method
D. English method - What is the correct sequence of the following events in rock tunnelling?
1. marking tunnel profile
2. loading explosives and blasting
3. checking misfire
4. mucking
5. removing foul gas
6. setting up and drilling
7. guniting
Select the correct answer using the codes given below
Codes ?A. 1,6,5,3,4,2,7
B. 1,2,6,3,5,4,7
C. 1, 6,2, 5,4, 3, 7
D. 1,6,2,5,3,4,7 - Which one of the following is a component of a shield for tunnelling ?
A. liner plate
B. trench jack
C. stiffener
D. cutting edge - Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
A. It is suitable for construction in unstable rocks
B. In this method, it is easy to install timber support
C. Tunnelling can be continuous and the work can be expedited
D. In case of excessive water, it is easy to take correct steps - Which of the following is not a component of the shield ?
A. propelling jacks
B. liner plate
C. hood
D. tail - What is the correct sequence of the following events of construction of a shaft in rock ?
1. drilling and blasting
2. timbering
3. pumping
4. muckingSelect the correct answer using the codes given below Codes?
A. 1,2,3,4
B. 1,4,2,3
C. 2,1,4,3
D. 2,4,1,3 - In Belgium method of tunneling _________________?
A. construction of side walls is completed before invert and roof arch are built
B. construction of roof arch is completed before side walls and invert are built
C. construction of invert is completed before side walls and roof arch are built
D. construction of invert and side walls is completed before roof arch is built - As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield___________________?
A. remains same
B. decreases
C. increases by 2.25 times
D. increases by 3.5 times
