Question: Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?

• 1. stone masonry
• 2. timber
• 3. cast iron
• 4. cement concrete

Question: Which one of the following tunnelling methods is used for laying under ground sewers ?

• 1. Needle beam method
• 2. Army method
• 3. German method
• 4. Italian method

Question: The most suitable soil for compressed air tunneling is________________?

• 1. silt
• 2. sand
• 3. clay
• 4. gravel

Question: Which of the following methods of tunneling is used for long tunnels at great depths ?

• 1. Army method
• 2. Needle beam method
• 3. Austrian method
• 4. English method

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

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

Question: Which one of the following is a component of a shield for tunnelling ?

• 1. liner plate
• 2. trench jack
• 3. stiffener
• 4. cutting edge

Question: Drift method of tunnelling is used to construct tunnels in__________________?

• 1. soft grounds
• 2. rock
• 3. self supporting grounds
• 4. broken grounds

Question: In Belgium method of tunneling _________________?

• 1. construction of side walls is completed before invert and roof arch are built
• 2. construction of roof arch is completed before side walls and invert are built
• 3. construction of invert is completed before side walls and roof arch are built
• 4. construction of invert and side walls is completed before roof arch is built

Question: Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____________________?

• 1. 2 m
• 2. 3 m
• 3. 4 m
• 4. 5 m

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

• 1. 42 D
• 2. 82 D
• 3. 104 D
• 4. 124 D