Drifters can be used to drill_________________?

Related Mcqs:

1. 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

2. The most suitable soil for compressed air tunneling is________________?

   A. silt
   B. sand
   C. clay
   D. gravel

3. 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

4. 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

5. Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____________________?

   A. 2 m
   B. 3 m
   C. 4 m
   D. 5 m

6. 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

7. 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. mucking

   Select 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

8. Which of the following are percussion drills ?

   (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

9. In the construction of Metro Railways, “Cut and Cover” method of construction is suitable in situations listed at________________?

   Consider the following situations

   1. Soil is soft
   2. Volume of existing surface traffic on the alignment is heavy
   3. Track is at a deeper level
   4. Water table is high

   A. 1 and 2
   B. 1 and 3
   C. 1 and 4
   D. 2 and 3

10. In “full face” method of constructing tunnels, the first operation relates to______________?

    A. removal of bottom portion
    B. excavation of one drift in the centre
    C. removal of top portion
    D. excavation being done along the periphery