Oberoi Realty B Tech Civil Engineer Interview Questions and Answers

Q1. Tests for concrete and cement
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Q2. Grades of concrete
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Grades of concrete refer to the strength of the concrete mix design.
• Grades of concrete are denoted by M10, M15, M20, etc. where M stands for mix and the number represents the compressive strength in N/mm^2.

• Higher grade concrete has higher compressive strength and is used for structural purposes.

• Common grades include M25, M30, M35, and M40 for heavy-duty structures like bridges and high-rise buildings.
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Q3. What is slump in concrete
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Slump in concrete refers to the measure of consistency of freshly mixed concrete.
• Slump is determined by the amount of water in the concrete mix.

• It is measured by filling a cone-shaped mold with concrete, then lifting the mold to see how much the concrete slumps.

• Different types of slumps (true slump, shear slump, collapse slump) indicate different levels of workability and strength of the concrete mix.

• Slump test is comm...read more
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Q4. What is water cement ratio
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Water cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix.
• Water cement ratio is a crucial factor in determining the strength and durability of concrete.

• A lower water cement ratio results in stronger and more durable concrete.

• The ideal water cement ratio varies depending on the type of concrete mix and its intended use.

• For example, a water cement ratio of 0.5 is commonly used ...read more
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Q5. What is M20 grade concrete
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M20 grade concrete is a mix of 1 part cement, 1.5 parts sand, and 3 parts aggregate, with a compressive strength of 20 MPa.
• M20 grade concrete is commonly used in residential construction.

• It is a mix of 1 part cement, 1.5 parts sand, and 3 parts aggregate.

• The compressive strength of M20 grade concrete is 20 MPa.

• It is suitable for foundations, beams, columns, and slabs.
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Q1. How to manage work
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Managing work involves planning, organizing, delegating, and monitoring tasks to ensure timely completion.
• Create a detailed work schedule outlining tasks and deadlines

• Delegate tasks to team members based on their skills and expertise

• Regularly communicate with team members to track progress and address any issues

• Prioritize tasks based on importance and urgency

• Use project management tools to streamline workflow, such as
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Subject knowledge of civil engineering

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Q1. Civil engineering question and aptitude
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Q2. Laminar flow in fluid
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Laminar flow is a type of fluid flow where the fluid moves in parallel layers with minimal mixing between the layers.
• Laminar flow occurs at low Reynolds numbers.

• The flow is smooth and predictable, with little to no turbulence.

• It is characterized by a constant velocity profile across the flow.

• Examples include flow in small pipes, blood flow in capillaries, and flow in a viscous liquid.
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Q3. Turbulent flow in fluid
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Turbulent flow in fluid is characterized by chaotic and unpredictable movement of particles.
• Turbulent flow occurs when the fluid velocity exceeds a certain threshold, causing eddies and vortices.

• It is characterized by irregular fluctuations in velocity and pressure within the fluid.

• Turbulent flow is common in natural phenomena like rivers, oceans, and atmospheric air currents.

• It is important to consider turbulent flow ...read more
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Quality control and waste management

Maths reasoning and core subjects

Q1. Tell us about last company
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Q1. M20 Grade Concrete proportion?
Ans. 
M20 grade concrete proportion is 1:1.5:3 (cement:sand:aggregate) with a compressive strength of 20 MPa.
• M20 grade concrete is commonly used for residential and commercial construction.

• The proportion of cement, sand, and aggregate is 1:1.5:3 by volume.

• The compressive strength of M20 grade concrete is 20 MPa.

• The water-cement ratio for M20 grade concrete is typically 0.5.
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Q2. M40 concrete strength?
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M40 concrete has a compressive strength of 40 megapascals (MPa).
• M40 concrete is a high-strength concrete mix commonly used in construction.

• It has a compressive strength of 40 MPa, which means it can withstand heavy loads and pressure.

• M40 concrete is typically used in the construction of bridges, high-rise buildings, and other structures that require high strength and durability.
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Q1. 20mm dia rod unit weight?
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The unit weight of a 20mm dia rod varies depending on the material it is made of.
• The unit weight of a 20mm dia rod made of steel is approximately 2.47 kg/m

• The unit weight of a 20mm dia rod made of brass is approximately 3.68 kg/m

• The unit weight of a 20mm dia rod made of aluminum is approximately 1.57 kg/m
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