Geologist

Geologist Interview Questions and Answers for Freshers

Updated 25 Oct 2021

Q1. How important is groundwater? Why do water levels in wells rise and fall? Your mom drinks "artesian well water". What is it? Ground water always clean? If yes conclude, How can water be flowing out of a hill? A...

Ans.

Groundwater is crucial for human and ecosystem survival. Water levels in wells rise and fall due to various factors. Artesian well water is from a confined aquifer. Groundwater is not always clean. Water can flow out of a hill due to natural springs. Porosity, permeability, water table, saturated zone, and unsaturated zone are important groundwater concepts.

Groundwater is essential for human and ecosystem survival
Water levels in wells fluctuate due to factors such as rainfall...read more

Q2. What is NATM? What is difference between RMR and Q-value? what is the procedure for portal stability? What are different type of rock bolts?

Ans.

NATM is a tunneling method that uses the surrounding rock mass to support the tunnel. RMR and Q-value are rock mass classification systems. Portal stability is the stability of the entrance to a tunnel. Rock bolts are used to reinforce the rock mass.

NATM stands for New Austrian Tunneling Method and is a tunneling method that relies on the strength of the surrounding rock mass to support the tunnel.
RMR (Rock Mass Rating) and Q-value are both rock mass classification systems us...read more

Q3. Which instruments used in tunnel excavation?

Ans.

Various instruments are used in tunnel excavation, including drilling machines, blasting equipment, and tunnel boring machines.

Drilling machines are used to create holes in the rock or soil for explosives.
Blasting equipment is used to break up the rock or soil.
Tunnel boring machines are used to excavate tunnels without the need for explosives.
Surveying instruments are used to ensure the tunnel is being excavated in the correct direction and at the correct angle.
Monitoring ins...read more

Q4. How we calculate RMR value?

Ans.

RMR value is calculated by assigning scores to various parameters related to rock mass characteristics.

RMR stands for Rock Mass Rating.
It is calculated by assigning scores to six parameters: uniaxial compressive strength, rock quality designation, spacing of discontinuities, condition of discontinuities, groundwater conditions, and orientation of discontinuities.
The scores for each parameter are added up to get the RMR value, which ranges from 0 to 100.
RMR value is used to as...read more

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Q5. What is RQD?

Ans.

RQD stands for Rock Quality Designation, a measure of rock mass quality used in geology and engineering.

RQD is calculated by measuring the percentage of intact rock pieces longer than 10 cm in a drill core sample.
It is used to assess the strength and stability of rock masses for engineering projects such as tunnels, dams, and foundations.
Higher RQD values indicate better rock quality and greater potential for stability.
RQD values can range from 0 to 100, with 100 indicating a...read more

Q6. What is grouting

Ans.

Grouting is a process of injecting a fluid material into the ground to fill voids or fractures.

Used in construction to strengthen soil or rock formations
Can be used to seal leaks in underground structures
Materials used include cement, bentonite, and chemical grouts

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Q7. What is Rock bolting

Ans.

Rock bolting is a technique used in geotechnical engineering to reinforce rock mass by inserting steel bolts into the rock.

Rock bolting is used to provide support to unstable rock formations.
It involves drilling holes into the rock and inserting steel bolts into them.
The bolts are then anchored into the rock using grout or resin.
Rock bolting is commonly used in mining, tunneling, and slope stabilization projects.
It helps to prevent rockfalls, collapses, and other hazards.
Exam...read more