Larsen & Toubro Limited QA QC Engineer Interview Questions, Process, and Tips

Q1. Mix design of concrete?
Ans. 
Mix design of concrete involves determining the proportions of various ingredients to achieve desired properties.
• The mix design process involves determining the water-cement ratio, aggregate-cement ratio, and admixture dosage.

• Factors such as strength, workability, and durability are considered when designing the mix.

• Examples of admixtures include water reducers, air-entraining agents, and superplasticizers.
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Q2. Durability parameters of concrete?
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Durability parameters of concrete include compressive strength, permeability, and resistance to freeze-thaw cycles.
• Compressive strength is the most commonly used parameter to measure concrete durability.

• Permeability is the ability of concrete to resist water penetration.

• Resistance to freeze-thaw cycles is important in areas with cold climates.

• Other parameters include abrasion resistance, chemical resistance, and shrink...read more
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Q3. ISO 9001 old vs new version?
Ans. 
ISO 9001:2015 emphasizes risk-based thinking and a process approach to quality management.
• ISO 9001:2015 has a stronger focus on leadership and top management involvement

• The new version emphasizes risk-based thinking and a process approach to quality management

• ISO 9001:2015 has a greater emphasis on measuring and evaluating the effectiveness of quality management systems

• The new version also includes a greater emphasis o...read more
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Q4. Rebar test parameter?
Ans. 
Rebar test parameters include diameter, length, weight, and tensile strength.
• Diameter: measured using a caliper or micrometer

• Length: measured using a tape measure or ruler

• Weight: measured using a scale

• Tensile strength: measured using a tensile testing machine

• Other parameters may include bend and rebend tests, weldability, and corrosion resistance
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Q5. Documentation at project lab?
Ans. 
Documentation is crucial in project lab for traceability and quality assurance.
• All activities and results should be documented

• Documentation should be clear, concise and accurate

• Documentation should be easily accessible and organized

• Documentation should include test plans, test cases, test results, and any deviations from the plan

• Documentation should be reviewed and approved by relevant stakeholders
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General intelligence

Q1. Fav subject and project related
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