Larsen & Toubro Limited Senior QA QC Engineer Interview Questions and Answers

Acceptance criteria for welding defects

• Acceptance criteria for welding defects are specified in codes and standards such as AWS D1.1, ASME Section VIII, and API 1104

• The criteria depend on the type of defect, its location, and the material being welded

• Examples of acceptance criteria include maximum allowable size and number of defects, distance from the weld centerline, and type of defect

• Defects that exceed the acceptan...read more

Pipe coating procedure involves applying a protective layer on the surface of the pipe to prevent corrosion and damage.

• The surface of the pipe should be cleaned and prepared before coating.

• The coating material should be selected based on the type of pipe and its intended use.

• The coating should be applied evenly and in accordance with the manufacturer's instructions.

• The coating should be inspected for defects and thickn...read more

To prepare measurement, follow these steps

• Identify the parameter to be measured

• Select the appropriate measuring instrument

• Calibrate the instrument before use

• Ensure the instrument is in good working condition

• Take multiple measurements to ensure accuracy

• Record the measurements accurately

• Analyze the data to draw conclusions

Attrition refers to gradual reduction in size or strength, while abrasion involves surface wear due to friction.

• Attrition is often a natural process, like the wearing down of rocks over time.

• Abrasion occurs through direct contact, such as sandpaper smoothing wood.

• In a business context, attrition can refer to employee turnover.

• Abrasion can be seen in medical terms, like skin abrasions from injuries.

The 7 principles of QMS ISO 9001:2015 guide organizations in improving quality management systems.

• Customer Focus: Prioritizing customer satisfaction, e.g., gathering feedback to enhance products.

• Leadership: Establishing a clear vision and direction, e.g., management setting quality objectives.

• Engagement of People: Involving employees at all levels, e.g., training programs to enhance skills.

• Process Approach: Managing ac...read more

Rolling margin refers to the permissible variation in the diameter of steel bars during manufacturing, crucial for quality control.

• Definition: Rolling margin is the difference between the theoretical weight of steel and the actual weight, indicating manufacturing precision.

• Importance: A rolling margin of 25mm diameter steel ensures that the bars meet specified standards for strength and durability.

• Calculation: The roll...read more

IS code for shuttering ply specifies standards for formwork materials used in construction, ensuring safety and quality.

• IS 4990: This standard specifies the requirements for plywood used in shuttering and formwork applications, ensuring durability and strength.

• Thickness and Grade: The code outlines various thicknesses and grades of plywood suitable for different construction needs, such as 12mm for heavy-duty use.

• Moist...read more