Tunnel Engineering MCQ Questions & Answers

41

For transferring the tunnel alignment through shafts, we adopt the following steps:
1.Hanging two or more plumb lines in the shaft
2.Determining the bearing of the plumb lines i.e. plumb plane
3.Suspending a 35 kg weight by each plumb line
4.Immersing the weights of both the plumb lines in the buckets containing water
The correct sequence of steps is:

A) 1, 2, 3, 4 B) 4, 3, 2, 1 C) 1, 3, 2, 4 D) 2, 1, 4, 3

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Answer & Solution

Answer: Option A

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42

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) Tunneling can be continuous and the work can be expedited D) In case of excessive water, it is easy to take correct steps

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Answer & Solution

Answer: Option C

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43

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

A) Full face method B) Top heading and benching method C) Drift method D) All the above

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Answer & Solution

Answer: Option D

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44

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

A) Propelling jacks B) Liner plate C) Hood D) Tail

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Answer & Solution

Answer: Option B

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45

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

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

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Answer & Solution

Answer: Option C

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46

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

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

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Answer & Solution

Answer: Option D

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47

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

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

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Answer & Solution

Answer: Option D

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48

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

A) The grass hopper method B) The passing track method C) California crossing method D) Dixon conveyor method

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Answer & Solution

Answer: Option A

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49

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

A) Blasting gelatine B) Special gelatine C) Ammonia dynamite D) Semi-gelatine

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Answer & Solution

Answer: Option C

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50

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

A) Blowing fresh air by ducts to the face of tunnel B) Exhausting foul air by ducts from the face of the tunnel and permitting fresh air through the tunnel C) Blowing fresh air and exhausting foul air by ducts D) All the above

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Answer & Solution

Answer: Option D

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Tunnel Engineering MCQ Questions & Answers | Civil Engineering