A good blast with a good yield is obtained if the cut hole is___________________?

Related Mcqs:

1. 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

2. Drifters can be used to drill_________________?

   A. only up holes
   B. only down holes
   C. horizontal or up holes
   D. horizor„al, down or up holes

3. The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?

   A. wagon drill, churn drill, shot drill
   B. wagon drill, shot drill, churn drill
   C. shot drill, churn drill, wagon drill
   D. churn drill, wagon drill, shot drill

4. 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

5. 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

6. Which one of the following is a component of a shield for tunnelling ?

   A. liner plate
   B. trench jack
   C. stiffener
   D. cutting edge

7. If ‘D’ is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by_________________?

   A. 42 D
   B. 82 D
   C. 104 D
   D. 124 D

8. Which of the following is not a component of the shield ?

   A. propelling jacks
   B. liner plate
   C. hood
   D. tail

9. 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

10. Assertion A : English method of tunneling requires more time as compared to other methods of tunneling. Reason R : In English method of tunneling, the masons and excavators have to work alternately/

    A. Both A and R are true and R is the correct explanation of A.
    B. Both A and R are true and R is not the correct explanation of A.
    C. A is true but R is false.
    D. A is false but R is true.