Denso Haryana Private Limited, Plant 1 Interview Questions and Answers

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

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 without adding extra water, and air-entraining agents, which c...read more

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.

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

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.

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 standardized tests such as the Casagrande method.

• Knowledge of liq...read more

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

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, such as high strength or low permeability.

• For example, a des...read more