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

A written test has been conducted by RDC In which they put questions from aptitude, reasoning, English grammar, general awareness and technical questions.

They make two group of 5 people and give a topic on which both groups have to put there points.

Q1. Questions from concrete technology and is codes.
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Q2. Prepare A mix design for M25?
Ans. 
Mix design for M25 concrete involves selecting suitable ingredients and proportions to achieve desired strength and durability.
• Determine the target strength of concrete (M25 in this case)

• Select suitable materials like cement, aggregates, and water

• Calculate the proportions of each material based on mix design principles

• Perform trial mixes and tests to ensure desired properties are achieved
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Q3. Which is code is used for mix design? What is yield of Concrete? What are the types of cement and name the different test for cemen? What do you understand from admixture and how many types of admixture a...read more
Ans. 
The code used for mix design is ASTM C192. The yield of concrete is the volume of concrete produced from a mixture of cement, water, and aggregates. There are different types of cement such as Portland cement, slag cement, and fly ash cement. Various tests for cement include compressive strength test, fineness test, and soundness test. Admixtures are added to concrete to improve its properties. Types of admixtures incl...read more
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Q4. Which is code is used for aggregate testing and specifications? Silt test Grading of aggregates Sand zone limit Crushing and impact test of aggregates Moisture correction Water absorption
Ans. 
Grading of aggregates is used for aggregate testing and specifications.
• Grading of aggregates is a method used to determine the particle size distribution of aggregates.

• It involves separating aggregates into different size fractions using sieves.

• The results of the grading test help in determining the quality and suitability of aggregates for various construction applications.
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Q5. What is the minimum slump required for pumping the concrete to 2nd floor?
Ans. 
The minimum slump required for pumping concrete to the 2nd floor is typically around 4 inches.
• Minimum slump of around 4 inches is usually required for pumping concrete to higher floors

• Higher slumps may be needed for longer pumping distances or to ensure proper flow and consolidation

• Consult with concrete supplier or pumping contractor for specific requirements
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Basics of aptitude such as reasoning, etc. . . . . .

General Topic mostly trending topics

Q1. Tell me about yourself
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Q2. What are your hobbies
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Q3. What is your family background
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Q4. What are your long-term goals
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Q5. Do you know about RMC
Ans. 
RMC stands for Ready Mix Concrete, a type of concrete that is manufactured in a batching plant according to a set recipe and then delivered to a work site by truck mounted transit mixers.
• RMC is a popular choice for construction projects as it offers consistent quality and reduces the need for on-site mixing.

• It is made by mixing cement, water, and aggregates (such as sand, gravel, or crushed stone) in specific proportio...read more
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Q6. How many hours of work you can put in a day with normal lunch and tea break?
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