Questions and answers for exam Preparation

MCQs

Total Questions : 203 | Page 5 of 21 pages

Question 41. For transferring the tunnel alignment through shafts, we adopt the following steps: 1.Hanging two or more plumb lines in the shaft2.Determining the bearing of the plumb lines i.e. plumb plane3.Suspending a 35 kg weight by each plumb line4.Immersing the weights of both the plumb lines in the buckets containing waterThe correct sequence of steps is:

1, 2, 3, 4
4, 3, 2, 1
1, 3, 2, 4
2, 1, 4, 3

Discuss Question

Answer: Option A. -> 1, 2, 3, 4

Question 42. Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?

It is suitable for construction in unstable rocks
In this method, it is easy to install timber support
Tunneling can be continuous and the work can be expedited
In case of excessive water, it is easy to take correct steps

Discuss Question

Answer: Option C. -> Tunneling can be continuous and the work can be expedited

Question 43. Which of the following is not a component of the shield?

Propelling jacks
Liner plate
Hood
Tail

Discuss Question

Answer: Option B. -> Liner plate

Question 44. Which one of the following methods is generally adopted for tunnelling in firm ground

Full face method
Top heading and benching method
Drift method
All the above

Discuss Question

Answer: Option D. -> All the above

Question 45. Which one of the following statements is not correct for heading and benching method of tunnelling?

Drilling and mucking can be done simultaneously
Benching provides a platform for working on heading
Removal of muck from the heading is very easy
None of these

Discuss Question

Answer: Option C. -> Removal of muck from the heading is very easy

Question 46. Which one of the following statements is not correct with regard to heading and henching method of tunnelling?

Driving of tunnel is done in two portions of its section
Driving the top portion is done in advance of the bottom portion
The holes in head and bench are loaded together with explosive for blasting
Firing of head holes is done just before the bench holes are fired

Discuss Question

Answer: Option D. -> Firing of head holes is done just before the bench holes are fired

Question 47. An overhead track on a large truss frame is required in case of car changer by

The grass hopper method
The passing track method
California crossing method
Dixon conveyor method

Discuss Question

Answer: Option A. -> The grass hopper method

Question 48. What is the correct sequence of the following events in rock tunnelling?1.Marking tunnel profile2.Loading explosives and blasting3.Checking misfire4.Mucking5.Removing foul gas6.Setting up and drilling7.GunitingSelect the correct answer using the codes given below.

1, 6, 5, 3, 4, 2, 7
1, 2, 6, 3, 5, 4, 7
1, 6, 2, 5, 4, 3, 7
1, 6, 2, 5, 3, 4, 7

Discuss Question

Answer: Option D. -> 1, 6, 2, 5, 3, 4, 7

Question 49. Pick up the mechanical ventilation method used for tunnels from the following:

Blowing fresh air by ducts to the face of tunnel
Exhausting foul air by ducts from the face of the tunnel and permitting fresh air through the tunnel
Blowing fresh air and exhausting foul air by ducts
All the above

Discuss Question

Answer: Option D. -> All the above

Question 50. Pick up the explosive used for tunnelling in soft rocks from the following: