Assistant Engineer Process Interview Questions and Answers

Heat is a form of energy that is transferred from one body to another as a result of a difference in temperature.

• Heat can be transferred through conduction, convection, and radiation.

• Conduction is the transfer of heat through a material without any movement of the material itself. Example: Touching a hot stove.

• Convection is the transfer of heat through the movement of fluids or gases. Example: Boiling water.

• Radiation is the transfer of heat through electromagnetic waves. Exam...read more

Cement is a binding material used in construction. There are various types of cement available for different purposes.

• Cement is made by heating limestone and clay in a kiln.

• Portland cement is the most common type of cement used in construction.

• Other types of cement include white cement, rapid hardening cement, and low heat cement.

• Each type of cement has different properties and is used for specific applications.

• For example, white cement is used for decorative purposes, while ...read more

Tombstone and missing issue can be controlled by implementing proper process controls and regular monitoring.

• Implement strict process controls to ensure all steps are followed correctly

• Regularly monitor production line for any signs of tombstone or missing issues

• Train employees on proper procedures and quality standards

• Utilize quality control tools such as checklists and inspections

• Address any issues immediately to prevent recurrence

PWI in reflow profile refers to the time between the start of preheat and the start of reflow soldering.

• PWI stands for Preheat to Wave Intersection

• It is a critical parameter in reflow soldering process

• PWI is the time interval between the start of preheat and the start of reflow soldering

• It ensures proper heating of the components before the solder paste melts

SPC (Statistical Process Control) is about monitoring and controlling a process to ensure it operates efficiently and produces quality products.

• SPC involves collecting and analyzing data to identify variations in a process.

• It helps in detecting and correcting any issues before they result in defects.

• Common tools used in SPC include control charts, histograms, and Pareto charts.

• Example: Using control charts to monitor the temperature in a manufacturing process to ensure consis...read more