Quality Control Expert

Quality Control Expert Interview Questions and Answers

Updated 25 Jan 2023

Q1. According to QA/QC for the construction of Railways and Highways. What is Quantity Control and Quality Assurance.

Ans.

Quantity control ensures the correct amount of materials are used, while quality assurance ensures the materials meet the required standards.

Quantity control involves measuring and verifying the amount of materials used in construction.
Quality assurance involves ensuring that the materials used meet the required standards and specifications.
Both quantity control and quality assurance are important for ensuring the safety and longevity of the constructed infrastructure.
Example...read more

Q2. Explain Targate meam strength and Mix design about concrete. What MDD and OMC of soil and strength of soil.

Ans.

Target mean strength and mix design are important factors in concrete quality control. MDD, OMC, and soil strength are crucial in soil quality control.

Target mean strength refers to the desired strength of concrete at a specific age, usually 28 days.
Mix design involves determining the proportions of various ingredients in concrete to achieve the desired strength and other properties.
MDD (Maximum Dry Density) and OMC (Optimum Moisture Content) are important parameters in soil ...read more

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Q3. Explain about Bituminous Mix Design and there respected IS code.

Ans.

Bituminous Mix Design is the process of determining the proportion of bitumen, filler, and aggregates for asphalt concrete.

The mix design is based on the traffic volume and the climatic conditions of the area.
The IS code for bituminous mix design is IS 10262.
The mix design involves determining the optimum bitumen content, aggregate gradation, and filler content.
The Marshall method and the Superpave method are commonly used for bituminous mix design.
The mix design aims to achi...read more

Q4. Soil ,cement, aggregate and concrete test mix design details

Ans.

Soil, cement, aggregate, and concrete test mix design details are essential for quality control.

Mix design details include the proportion of each component in the mix
Tests are conducted to ensure the mix meets required specifications
Soil tests include tests for compaction, moisture content, and bearing capacity
Cement tests include tests for fineness, strength, and setting time
Aggregate tests include tests for gradation, abrasion resistance, and soundness
Concrete tests include...read more

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Q5. Strength of concrete after 28 days explain

Ans.

Strength of concrete after 28 days is a measure of its compressive strength.

Concrete gains strength over time due to the chemical reaction between cement and water.
After 28 days, most concrete reaches 99% of its strength potential.
The strength of concrete is measured in pounds per square inch (psi).
The minimum strength of concrete for most applications is 2500 psi.
Factors that affect concrete strength include water-cement ratio, curing conditions, and aggregate type and size.