10+ Junior Engineer Quality Control Interview Questions and Answers

The code for different building materials varies based on their properties and intended use.

• Different building materials require different codes to ensure safety and compliance.

• For example, the International Building Code (IBC) is used for structural materials like concrete and steel.

• Electrical codes, such as the National Electrical Code (NEC), govern the use of electrical materials.

• Plumbing codes, like the International Plumbing Code (IPC), regulate plumbing materials and in...read more

The wiper motor is an electrical device that powers the windshield wipers, allowing them to move back and forth to clear the windshield.

• The wiper motor receives power from the vehicle's electrical system.

• It converts the electrical energy into mechanical energy to drive the wiper arms.

• The motor is controlled by a switch on the dashboard, which allows the driver to control the speed and movement of the wipers.

• The motor typically has multiple speeds to adjust the wiper speed acc...read more

CAPA stands for Corrective and Preventive Action. Powder coating is a type of coating that is applied as a free-flowing, dry powder.

• CAPA is a process used to identify, investigate, and correct quality issues in a product or process

• Powder coating is a method of applying a protective and decorative finish to a wide range of materials

• Powder coating is often used in industries such as automotive, aerospace, and construction

OPL and SORT are statistical tests used in quality control to determine if a process is stable and in control.

• OPL stands for One Point Lesson and is used to train employees on a specific task or process.

• SORT stands for Sequential Occurrence Ratio Test and is used to detect shifts or trends in a process.

• Both tests are used to ensure that a process is consistent and producing quality products.

• For example, if a company is producing widgets and notices a sudden increase in defect...read more

Transformers and motors are types of electrical machines commonly used in industries.

• Transformers are used to transfer electrical energy from one circuit to another through electromagnetic induction.

• Motors are used to convert electrical energy into mechanical energy, and are commonly used in industrial machinery.

• Other types of electrical machines used in industries include generators, transformers, and alternators.

• Industries use motors for various applications such as driving...read more

The 7QC tools are a set of quality control tools used to identify and solve quality-related problems in manufacturing processes.

• The 7QC tools include: Pareto chart, cause-and-effect diagram, check sheet, control chart, histogram, scatter diagram, and flowchart.

• These tools help to identify the root cause of quality problems, track progress, and make data-driven decisions.

• For example, a Pareto chart can be used to identify the most common defects in a manufacturing process, whi...read more

5S is a methodology for workplace organization and Kaizen is a continuous improvement process.

• 5S involves sorting, simplifying, sweeping, standardizing, and sustaining a workplace to improve efficiency and safety.

• Kaizen involves identifying and eliminating waste, improving processes, and continuously making small improvements.

• Both methodologies are commonly used in manufacturing and other industries to improve quality and productivity.

• Example of 5S: organizing tools in a tool...read more

Types of black box testing include equivalence partitioning, boundary value analysis, decision table testing, state transition testing, and error guessing.

• Equivalence partitioning: Dividing input data into different partitions and selecting representative values from each partition for testing.

• Boundary value analysis: Testing at the boundaries of input ranges to ensure the system behaves correctly.

• Decision table testing: Creating a table to represent different combinations of...read more

Solar panels convert sunlight into electricity through the photovoltaic effect.

• Solar panels are made up of photovoltaic cells that absorb sunlight and convert it into direct current (DC) electricity.

• The DC electricity is then converted into alternating current (AC) electricity through an inverter.

• The electricity generated by solar panels can be used to power homes, businesses, and even entire cities.

• Solar panels require direct sunlight to generate electricity, so their effici...read more

Welding is a process of joining two or more metal parts by heating them to a high temperature and applying pressure to fuse them together.

• Welding is used in various industries such as construction, automotive, and aerospace.

• There are different types of welding techniques such as MIG, TIG, and Stick welding.

• Welding requires proper safety measures such as wearing protective gear and ensuring proper ventilation.

• Welding defects such as cracks, porosity, and incomplete fusion can ...read more

A joint is a point where two or more bones meet.

• Joints allow movement and flexibility in the body.

• There are different types of joints such as hinge, ball and socket, and pivot joints.

• Examples of joints include the knee joint, elbow joint, and shoulder joint.

Black box testing is a software testing method where the internal structure/design of the system being tested is not known to the tester.

• Tester focuses on the functionality of the software without knowing its internal code

• Tests are based on the software requirements and specifications

• Input data is provided and output is compared with expected results

• Examples: GUI testing, system testing, acceptance testing

GD&T stands for Geometric Dimensioning and Tolerancing, a system for defining and communicating engineering tolerances.

• GD&T is a symbolic language used on engineering drawings to specify the allowable variations in form, size, and orientation of features.

• It helps ensure that parts fit together properly and function as intended.

• GD&T uses symbols such as concentricity, flatness, perpendicularity, and position to communicate design requirements.

• It is commonly used in industries ...read more

Pareto chart is a bar graph that displays the frequency of defects or issues in descending order to prioritize improvement efforts.

• Pareto chart helps in identifying the most significant factors contributing to a problem.

• It follows the 80/20 rule, where 80% of the problems are often caused by 20% of the factors.

• The bars are arranged in descending order of frequency, with a cumulative percentage line to show the total contribution.

• It helps in focusing on the vital few issues th...read more

Quality is the degree of excellence of a product or service as perceived by the customer.

• Quality is meeting or exceeding customer expectations.

• It involves consistency, reliability, and durability.

• Quality is achieved through continuous improvement and adherence to standards.

• Examples include a well-built car that lasts for years without major issues, or a software program that functions smoothly without bugs.

The 7 QC tools are a set of basic statistical tools used for quality control in manufacturing processes.

• Check sheet: Used to collect and analyze data in a systematic manner.

• Histogram: Represents data distribution visually to identify patterns and trends.

• Pareto chart: Helps prioritize issues by showing the most significant factors affecting quality.

• Cause and effect diagram (Fishbone diagram): Identifies root causes of problems.

• Scatter diagram: Shows the relationship between tw...read more