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    Online Study Materials on Civil Tunnel Engineering - Set 04

    Practice Test: Question Set - 04


    1. Pick up the correct statement from the following during tunnel excavation,
      (A) Oxygen should not be less than 19.5%
      (B) Carbondioxide should not be more than 0.5%
      (C) Hydrogen sulphide should not be more than 0.001%
      (D) All of the above

    2. In case of drift method of tunnelling, the drift may be excavated at
      (A) The centre
      (B) The top or bottom
      (C) The side
      (D) All of the above

    3. In case of railways,
      (A) A detour round the hill is preferred
      (B) A open cut is preferred
      (C) Tunnelling is preferred
      (D) All the above

    4. Which one of the following statements is not correct in respect of setting of an inclined tunnel?
      (A) Reference points are constructed at every 300 m
      (B) The alignment is fixed from upper/lower apex point
      (C) The level of the invert at the heading is marked by a tape
      (D) None the above

    5. Railway tunnels are generally
      (A) Polycentric
      (B) Rectangular
      (C) Parabolic
      (D) Circular

    6. The cut of a tunnel face is shown in given figure. This is called
    Set 04, Question No. 06
      (A) Michigan cut
      (B) Burn cut
      (C) Fan cut
      (D) Horizontal cut

    7. High pressure grouting is generally restored for concreting in the lining if the rock strata is:
      (A) Highly fissured
      (B) Poor
      (C) Likely to get seepage of water
      (D) All of the above

    8. In compressed air tunnelling, the volume of free air provided is
      (A) 6 m3 per second per m² of face area
      (B) 6 m3 per minute per m² of face area
      (C) 20 m3 per minute per m² of face area
      (D) 6 m3 per hour per m² of face area

    9. 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

    10. 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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    Item Reviewed: Online Study Materials on Civil Tunnel Engineering - Set 04 Rating: 5 Reviewed By: Pranab Debnath
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