Sadara Chemical Company Instrument Commissioning Technician Interview Questions and Answers

Mass transfer is the movement of substances from one place to another.

• Mass transfer involves the movement of components in a system due to differences in concentration, pressure, or temperature.

• Examples include the diffusion of gases in air, the separation of components in distillation processes, and the absorption of gases in liquids.

• Mass transfer is important in various industries such as chemical engineering, food p

Distillation is a process of separating components of a liquid mixture based on differences in boiling points.

• Distillation involves heating the liquid mixture to create vapor, then cooling the vapor to condense it back into liquid form.

• The components with lower boiling points will vaporize first and be collected, while the components with higher boiling points will remain in the liquid phase.

• Common examples of distilla...read more

The plant is a manufacturing facility that produces products through a series of processes.

• The plant has multiple production lines that operate simultaneously

• Raw materials are received and stored in the warehouse before being processed

• The production process involves mixing, heating, cooling, and packaging

• Quality control checks are performed at various stages of the process

• Finished products are stored in the finished go

The amount of space filled by dust varies depending on the quantity and size of particles.

• The space filled by dust can range from a small area on a surface to an entire room or building.

• Factors such as air circulation, particle size, and accumulation over time can affect the amount of space filled by dust.

• For example, a dusty bookshelf may only fill a few square feet of space, while a neglected attic could be completel

Measurement refers to the process of determining the size, length, quantity, or extent of something using standard units.

• Measurement involves comparing an unknown quantity to a known standard unit.

• Examples of measurements include length (inches, meters), weight (pounds, kilograms), volume (liters, gallons), and time (seconds, minutes).

• Accurate measurements are essential in fields such as science, engineering, and const

One liter of cement-based primer typically covers around 8 to 10 square meters of surface area.

• One liter of cement-based primer covers approximately 8 to 10 square meters

• Coverage may vary depending on the porosity and texture of the surface

• It is recommended to refer to the manufacturer's instructions for specific coverage rates

Types of primers include bonding primers, stain-blocking primers, and high-build primers.

• Bonding primers help paint adhere to surfaces like metal or plastic

• Stain-blocking primers prevent stains from bleeding through paint

• High-build primers are thick and fill in imperfections on surfaces

• Other types include shellac-based primers, oil-based primers, and water-based primers

Oil paint can take anywhere from a few days to several weeks to fully dry, depending on factors like thickness and environmental conditions.

• Oil paint can take anywhere from a few days to several weeks to dry completely.

• Factors like the thickness of the paint layer and environmental conditions (humidity, temperature) can affect drying time.

• Thicker layers of oil paint will take longer to dry compared to thin layers.

• Paint...read more

There are various types of valves used in different industries for controlling the flow of fluids or gases.

• Gate valve

• Ball valve

• Butterfly valve

• Check valve

• Globe valve

• Diaphragm valve

• Plug valve

• Needle valve

• Pressure relief valve

• Safety valve

Pressure units are used to measure the force exerted on a surface per unit area.

• Pressure is typically measured in units such as pascal (Pa), bar, psi, or atmosphere (atm).

• 1 pascal (Pa) is equal to 1 newton per square meter (N/m²).

• 1 bar is approximately equal to atmospheric pressure at sea level (1 atm).

• 1 psi (pound per square inch) is equal to approximately 6895 pascals (Pa).

The fire triangle is a model that explains the three elements required for a fire to start and continue. Diamonds are a form of carbon that is highly valued for their beauty and durability.

• The fire triangle consists of three elements: fuel, heat, and oxygen.

• If any of these elements are removed, the fire will be extinguished.

• Diamonds are formed deep within the Earth's mantle and are brought to the surface through volcan...read more

The Bernoulli equation relates the pressure, velocity, and elevation of a fluid in a streamline.

• The Bernoulli equation is a fundamental equation in fluid dynamics.

• It states that the total energy of a fluid remains constant along a streamline.

• The equation relates the pressure, velocity, and elevation of the fluid.

• It is derived from the principle of conservation of energy.

• The equation is commonly used in various applicat...read more

There are numerous types of unit operations and unit processes in production.

• Unit operations involve physical changes to materials, such as mixing, filtration, and distillation.

• Unit processes involve chemical changes, such as oxidation, reduction, and hydrolysis.

• Examples of unit operations include crushing, grinding, and drying.

• Examples of unit processes include fermentation, polymerization, and chlorination.

List is mutable, tuple is immutable in Python.

• List can be modified, tuple cannot be modified

• List uses square brackets [], tuple uses parentheses ()

• List is used for collections of items that may change, tuple is used for fixed collections