# Tunnel Engineering

• ## 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:

• A. 1, 2, 3, 4
• B. 4, 3, 2, 1
• C. 1, 3, 2, 4
• D. 2, 1, 4, 3
Explanation:

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

• ## Which one of the following is a component of a shield for tunneling?

• A. Liner plate
• B. Trench jack
• C. Stiffener
• D. Cutting edge
Explanation:

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

• ## 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
Explanation:

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

• ## Which of the following are percussion drills?(i) Shot drill(ii) Diamond drill(iii) Wagon drill(iv) Churn drill

• A. (i) and (ii) are correct
• B. (iii) and (iv) are correct
• C. (i) and (iv) are correct
• D. (ii) and (iii) are correct
Explanation:

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

• ## For initial surveys of tunnels, the following activities are involved:1.Marking portal point with concrete pillars on the ground2.Marking tunnel obligatory points on the topographical maps3.Preliminary setting of the tunnel on the topographical Survey of India maps4.Driving lines between the fixed obligatory pointsThe correct sequence of the activities is:

• A. 3, 2, 4, 1
• B. 1, 2, 3, 4
• C. 4, 3, 1, 2
• D. 2, 4, 3, 1
Explanation:

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

• ## A tunnel is found more advantageous as compared to the alternate routes because it:

• A. Remains free from snow
• B. Reduces the cost by reducing the route distance
• C. Reduces the maintenance cost
• D. All the above
Explanation:

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

• ## 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
Explanation:

No answer description available for this question.

• ## The method of draining in the tunnels, is generally known as_____.

• A. Foredrainage
• B. Dewatering
• C. Permanent drainage
• D. All of the above
Explanation:

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

• ## Pick up the correct statement regarding drilling a tunnel from the following:

• A. Holes are drilled by pneumatically operated rock drills
• B. One drill is required for each 4 to 5 m2 force area
• C. The diameter of the bore hole at the deepest point should be 6 mm more than the diameter of the cartridge
• D. All of the above
Explanation:

No answer description available for this question.

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