Viraj Constructions Civil Site Engineer Interview Questions and Answers

Q1. What is cement and sand
Ans. 
Cement is a binding material used in construction to hold together bricks, stones, and other materials. Sand is a fine aggregate used in concrete mixes.
• Cement is a powdery substance made from limestone and clay, which when mixed with water forms a paste that hardens to bind materials together.

• Sand is a granular material composed of finely divided rock and mineral particles, commonly used as a fine aggregate in concrete...read more
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Q2. What is aggregate and sand
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Aggregate and sand are materials commonly used in construction for creating concrete and mortar.
• Aggregate is a mixture of sand, gravel, crushed stone, or other materials used in construction.

• Sand is a granular material composed of finely divided rock and mineral particles.

• Aggregate is used in concrete to provide bulk and strength, while sand is used in mortar for bonding materials together.

• Examples of aggregate include...read more
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Q1. Qty of cement in M25 grade concrete
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The quantity of cement in M25 grade concrete is 350 kg/m³.
• M25 grade concrete has a mix proportion of 1:1:2 (cement:sand:aggregate).

• The total volume of concrete is taken as 1 m³.

• Therefore, the quantity of cement required for 1 m³ of M25 grade concrete is 350 kg.

• This is calculated by multiplying the volume of concrete by the proportion of cement in the mix.
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Q2. Exact weight of different dia of steel
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The weight of steel varies with its diameter.
• The weight of steel can be calculated using the formula: weight = volume x density

• The density of steel is approximately 7850 kg/m³

• The volume of steel can be calculated using the formula: volume = pi x (diameter/2)² x length

• For example, a 10mm diameter steel rod with a length of 1 meter would weigh approximately 0.393 kg
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Q3. Process of waterproofing
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Waterproofing is the process of making a structure or object resistant to water penetration.
• Identify the areas that need waterproofing such as roofs, walls, and foundations.

• Clean and prepare the surface to be waterproofed.

• Apply a waterproofing membrane or coating such as bituminous, acrylic, or polyurethane.

• Ensure proper drainage and slope to prevent water accumulation.

• Test the waterproofing system for leaks and make n...read more
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Q4. Conversion of brass to Cum
Ans. 
Conversion of brass to Cum
• Brass is an alloy of copper and zinc, while Cum is not a known substance

• It is not possible to convert brass to Cum

• Perhaps the question is referring to a different substance or material
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STEEL WEIGHT, BBS,COVER BLOCK

Q1. LAYOUT, DRAWING READING
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Q1. What is the weight of one bag cement
Ans. 
The weight of one bag of cement varies depending on the country and type of cement.
• The weight of one bag of cement is typically between 25kg and 50kg.

• In the United States, a bag of Portland cement usually weighs 94 pounds (42.6kg).

• In Europe, a bag of cement typically weighs 50kg.

• Different types of cement, such as lightweight cement, may have different weights per bag.
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Q2. What is initial setting time of cement
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Initial setting time of cement is the time taken for the cement paste to harden sufficiently to resist certain specified pressure.
• Initial setting time is an important property of cement as it determines the time available for mixing, placing, and finishing of concrete.

• It is measured by the Vicat apparatus, which consists of a needle and a mould filled with cement paste.

• The initial setting time is typically around 30 mi...read more
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Q3. What is the size of concrete cube
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The size of a concrete cube refers to its dimensions, typically measured in millimeters.
• The size of a concrete cube is usually specified by the engineer or client.

• Common sizes for concrete cubes are 150mm, 200mm, and 300mm.

• The size of the cube is important for testing the compressive strength of the concrete.

• The cubes are typically cast and cured for a specific period before testing.
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Q4. What is the minimum diameter for doweals bar
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The minimum diameter for dowel bars depends on the specific application and design requirements.
• The minimum diameter for dowel bars is typically specified in the project's design documents or specifications.

• It is important to consider factors such as the load transfer requirements, concrete strength, and spacing between dowel bars when determining the minimum diameter.

• In general, dowel bars for pavement joints are comm...read more
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Q1. What is the lap length of bars for compperision zone
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The lap length of bars for compression zone is the minimum length required to ensure proper transfer of stress between two overlapping bars.
• The lap length is determined based on the diameter of the bars, concrete strength, and the bond strength between the bars and concrete.

• It is important to provide adequate lap length to prevent failure due to inadequate bond between the bars and concrete.

• The lap length for compressi...read more
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Q2. What is the minimum alowable ph value of water
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The minimum allowable pH value of water is 6.5.
• The minimum allowable pH value of water is determined by various regulatory bodies and standards.

• For drinking water, the World Health Organization recommends a minimum pH of 6.5 to prevent corrosion of pipes and plumbing fixtures.

• In some industrial processes, a minimum pH of 6.0 or even lower may be required.

• Water with a pH below the minimum allowable value may be consider...read more
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Q1. Civil engineer questions
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Q1. Just construction activities
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Q1. Just Salary negotiations
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Q1. Position and Salary Finalisation
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Q1. Self introduction
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Q2. Experience based
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Q1. Initial setting time of cement
Ans. 
Initial setting time of cement refers to the time taken for the cement paste to harden enough to resist certain pressure.
• Initial setting time is the time taken for the cement paste to harden enough to resist a certain pressure, typically 3.5 N/mm^2.

• It is an important property of cement as it determines the workability and strength development of concrete.

• The initial setting time of cement is usually around 30 minutes t...read more
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