Government Head Quarters Hospital - Namakkal Interview Questions and Answers

Pullout test is a method to determine the bond strength between concrete and reinforcement in a structure.

• Pullout test involves applying a tensile force to a steel bar embedded in concrete to measure the force required to pull it out.

• It is used to assess the quality of concrete and the effectiveness of reinforcement in a structure.

• The test helps in evaluating the bond strength between concrete and reinforcement, which is crucial for structural integrity.

• Pullout tests are comm...read more

Blast details include powder factor and quantity of explosives used.

• Powder factor is the amount of explosives used per unit volume of rock to be blasted

• Quantity of explosives used is typically measured in kilograms or pounds

• Blast details are crucial for ensuring safe and efficient tunnel excavation

Standup time refers to the time it takes for concrete to set and gain enough strength to support itself. Tunnel supports are structures used to stabilize the tunnel walls and roof.

• Standup time is crucial for ensuring the stability of the tunnel during construction.

• Tunnel supports can include rock bolts, shotcrete, steel ribs, and lattice girders.

• The type of tunnel support used depends on the geology of the surrounding rock and the design requirements of the tunnel.

• Proper inst...read more

Powder factor is a measure of the amount of explosive used per unit volume of rock in tunneling operations.

• Powder factor is calculated by dividing the weight of explosives used by the volume of rock being blasted.

• It is typically expressed in units of kilograms or pounds of explosives per cubic meter or cubic yard of rock.

• A higher powder factor indicates a greater amount of explosives used, which can result in more efficient rock fragmentation.

• Powder factor is an important par...read more

Cycle time of advancement refers to the time taken for the tunnel boring machine to progress a certain distance.

• Cycle time can vary depending on factors such as geology, machine efficiency, and crew experience.

• For example, a tunnel boring machine may advance 10-15 meters per day in stable rock conditions.

• However, in more challenging ground conditions, the cycle time may be slower due to the need for additional support measures.

• Regular maintenance and efficient operation can h...read more

RMR value stands for Rock Mass Rating value, which is a geotechnical classification system used to assess the quality of rock masses.

• RMR value is used in tunnel engineering to evaluate the stability and support requirements of rock masses.

• It takes into account various parameters such as rock strength, joint conditions, groundwater conditions, and orientation of discontinuities.

• RMR values range from 0 to 100, with higher values indicating better rock mass quality and stability...read more

NATM stands for New Austrian Tunneling Method, a construction method for tunnels.

• NATM is a tunneling method that involves excavating the tunnel while providing support using rock bolts, shotcrete, and steel ribs.

• It is a flexible and adaptable method that allows for adjustments during construction based on the geological conditions encountered.

• NATM is commonly used in soft ground conditions where traditional tunneling methods may not be suitable.

• Examples of tunnels constructed...read more