RDC Concrete (India) Senior Technical Officer Interview Questions, Process, and Tips

Q1. What is the procedure to perform Rebound Hammer Test?
Ans. 
Rebound Hammer Test is a non-destructive test to determine the compressive strength of concrete.
• Calibrate the rebound hammer before use

• Clean the surface of the concrete to be tested

• Hold the rebound hammer perpendicular to the surface and press the plunger to release the hammer

• Record the rebound value and repeat the test at least twice on each location

• Calculate the average rebound value and use a conversion chart to det...read more
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Q2. What are the next procedure when cubes does not attain strength as per is code?
Ans. 
If cubes do not attain strength as per IS code, next procedures include identifying the cause, taking corrective measures, and retesting.
• Identify the cause of low strength, such as improper mixing, curing, or testing procedures.

• Take corrective measures, such as adjusting the mix proportions, improving curing conditions, or retesting with proper procedures.

• Retest the cubes to ensure they meet the required strength as pe...read more
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Q3. Reason to leave ex company
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Q4. Why you have choosen RDC Concrete?
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Easy questions from percentage,profit loss and Reasoning

Q1. Give a brief Introduction of yourself.
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Q2. Topic of research in M.tech
Ans. 
My research topic in M.tech was on the development of machine learning algorithms for predictive maintenance in industrial systems.
• Developed machine learning models to predict equipment failures in industrial systems

• Used data from sensors and other sources to train the models

• Implemented the models in real-world scenarios to demonstrate their effectiveness

• Explored different algorithms and techniques to improve the accur
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Q3. How do you measure heat of hydration
Ans. 
Heat of hydration can be measured using calorimetry.
• Calorimetry involves measuring the heat released or absorbed during a chemical reaction.

• The heat of hydration can be calculated by subtracting the heat released by the reaction of the anhydrous compound with water from the heat released by the reaction of the hydrated compound with water.

• For example, the heat of hydration of calcium chloride can be measured by reactin...read more
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Q4. Usage of mineral admixture
Ans. 
Mineral admixtures are used in concrete to improve its properties.
• Mineral admixtures are added to concrete to enhance its strength, durability, and workability.

• They can also reduce the amount of cement needed in concrete mixtures.

• Examples of mineral admixtures include fly ash, silica fume, and ground granulated blast furnace slag.

• Fly ash is a byproduct of coal combustion and is commonly used as a mineral admixture in c...read more
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Q1. Normal discussion related to salary hike.
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Reasoning and aptitude

Q1. Design Mix of concrete
Ans. 
Design mix of concrete refers to the process of selecting suitable ingredients and determining their proportions to produce concrete with desired properties.
• Design mix involves selecting the type and quality of materials such as cement, aggregates, and water.

• Proportions of each material are determined based on the desired strength, workability, and durability of the concrete.

• Factors like environmental conditions, const...read more
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Q1. Concrete related questions
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Q1. Concrete related questions
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Q1. What are your salary expectations?
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Q2. What is your family background?
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Q3. Share details of your previous job.
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Q4. Why are you looking for a change?
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Q5. Tell me about yourself.
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