SRK Constructions Projects Senior Engineer Interview Questions and Answers

Structures for pipe , box , slab , and bridge

Q1. What is the process of using admixture in concrete
Ans. 
Admixtures are added to concrete to alter its properties or enhance its performance.
• Admixtures are added to concrete during mixing to modify its properties such as workability, strength, durability, and setting time.

• They can be classified into different types such as water-reducing, air-entraining, accelerating, retarding, and plasticizers.

• Examples of admixtures include superplasticizers, which improve workability with...read more
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Q2. What is the proportionate of m15 pcc
Ans. 
The proportionate of M15 PCC is 1:2:4 (cement:sand:aggregate).
• M15 PCC stands for Mix 15 Plain Cement Concrete.

• The proportionate of M15 PCC is 1:2:4, which means 1 part cement, 2 parts sand, and 4 parts aggregate.

• This proportion is commonly used in construction for moderate strength concrete.
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Q3. What is liquid limit and plastic limit
Ans. 
Liquid limit and plastic limit are two important properties of soil used in geotechnical engineering.
• Liquid limit is the moisture content at which soil changes from a plastic to a liquid state.

• Plastic limit is the moisture content at which soil changes from a plastic to a semi-solid state.

• The difference between liquid limit and plastic limit is known as the plasticity index.

• These properties are determined using standar...read more
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Q4. Which type of grade cement used in Rcc slab
Ans. 
Generally, grade 53 cement is used in RCC slabs due to its high strength and durability.
• Grade 53 cement is commonly used in RCC slabs for its high compressive strength.

• It provides better resistance to cracking and shrinkage compared to lower grade cements.

• Grade 53 cement is suitable for heavy-duty structures like RCC slabs, beams, and columns.
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Q5. Which type of steel used for bridge works
Ans. 
High-strength low-alloy (HSLA) steel is commonly used for bridge works due to its superior strength and durability.
• High-strength low-alloy (HSLA) steel is commonly used for bridge construction

• HSLA steel offers superior strength and durability compared to traditional carbon steel

• Examples of HSLA steel used in bridges include ASTM A572 and ASTM A588
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Q6.  What is the dencity value of aggregate to m30 concrete
Ans. 
The density value of aggregate to M30 concrete is typically around 1450-1550 kg/m^3.
• The density of aggregate used in M30 concrete is usually between 1450-1550 kg/m^3

• The specific density value may vary depending on the type of aggregate used

• The density of aggregate is an important factor in determining the overall density and strength of the concrete mix
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Q1. How should prepare a mix proportionate
Ans. 
Mix proportioning is crucial for achieving desired concrete properties.
• Determine the required strength and durability of the concrete

• Select suitable materials such as cement, aggregates, and water

• Calculate the proportions based on the desired properties and material characteristics

• Adjust the mix design based on trial batches and test results

• Consider factors like workability, setting time, and cost
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Q1. What is meant by design mix
Ans. 
Design mix refers to the proportion of various materials in concrete mix to achieve desired properties.
• Design mix is a specific combination of cement, aggregates, and water to achieve the desired strength and durability of concrete.

• It is determined by conducting tests and calculations to ensure the mix meets the required specifications.

• Design mix allows engineers to tailor the concrete mix for specific applications, su...read more
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