Civil GET Interview Questions and Answers

Tunnel lining is the process of constructing a protective layer inside a tunnel to provide stability and prevent water ingress.

• Tunnel lining can be done using various methods such as shotcrete, precast concrete segments, and cast-in-place concrete.

• Shotcrete involves spraying a mixture of cement, sand, and water onto the tunnel walls using a high-pressure hose.

• Precast concrete segments are manufactured off-site and then transported to the tunnel where they are assembled to for...read more

Vibrators are used in gantries for compacting concrete and ensuring its strength and durability.

• Vibrators are used to remove air bubbles and excess water from freshly poured concrete.

• They help in achieving proper compaction and density of the concrete.

• Vibrators are commonly used in the construction of bridges, dams, and other large structures.

• They can be handheld or attached to the gantry for larger-scale operations.

• Examples of vibrators used in gantries include internal vibr...read more

Gantry lining is a construction technique used to reinforce and stabilize tunnels or underground structures.

• Gantry lining involves the installation of precast concrete segments or steel plates along the tunnel walls.

• These segments or plates are carefully positioned and secured to form a continuous lining.

• The lining provides structural support, prevents soil or water ingress, and enhances the overall stability of the tunnel.

• Gantry lining can be used in various civil engineerin...read more

The density of concrete is a measure of its mass per unit volume.

• Density of concrete typically ranges from 2200 to 2500 kg/m³.

• The density can vary depending on the composition and aggregates used.

• Lightweight concrete has lower density, around 1600 to 2000 kg/m³.

• High-density concrete, used for radiation shielding, can have density up to 6000 kg/m³.

Components of dams include spillways, gates, reservoir, and embankment.

• Spillways are structures that allow excess water to flow out of the dam.

• Gates are used to control the flow of water through the dam.

• Reservoir is the body of water created by the dam.

• Embankment is the structure that holds back the water in the reservoir.

• Other components may include intake structures, powerhouses, and fish ladders.