20+ Diploma Chemical Engineer Interview Questions and Answers

Confined space entry involves following a specific procedure to ensure safety and minimize risks.

• Identify and assess the confined space

• Implement proper ventilation and atmospheric testing

• Use appropriate personal protective equipment (PPE)

• Establish communication and rescue procedures

• Monitor and control hazards throughout the entry

• Train and educate workers on confined space entry procedures

Yes, chemical reactions occur in the brain.

• Chemical reactions in the brain are responsible for various functions such as memory, learning, and emotions.

• Neurotransmitters like dopamine, serotonin, and norepinephrine are produced through chemical reactions in the brain.

• Imbalances in these chemical reactions can lead to mental health disorders like depression and anxiety.

Pump changeover involves stopping the current pump, disconnecting it, installing a new pump, and starting it.

• Stop the current pump and disconnect it from the system

• Install the new pump and connect it to the system

• Prime the new pump to remove any air pockets

• Start the new pump and monitor it for proper operation

• Dispose of the old pump properly

Mass flux is the amount of mass passing through a unit area per unit time. Kick's law relates to the energy required for size reduction.

• Mass flux is a measure of the amount of mass flowing through a given area per unit time.

• It is commonly used in chemical engineering to describe the flow of fluids through pipes or other conduits.

• Kick's law is a relationship between the energy required for size reduction and the size reduction ratio.

• It is often used in the design of crushing e...read more

Yes, I have faced shutdowns of plants in my previous job.

• I have experienced shutdowns due to equipment failure, power outages, and maintenance work.

• During these shutdowns, I worked with the maintenance team to identify the root cause and develop a plan to resume operations as soon as possible.

• I also ensured that all safety protocols were followed during the shutdown and startup processes.

• I learned the importance of proactive maintenance and contingency planning to minimize th...read more

Mass transfer is the movement of substances from one place to another, while diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

• Mass transfer involves the movement of substances such as molecules, ions, or atoms from one location to another.

• Diffusion is a type of mass transfer where molecules move from an area of high concentration to an area of low concentration.

• Diffusion occurs due to the random motion of molecules and ...read more

Mass transfer is the movement of substances from one place to another due to a concentration gradient.

• Mass transfer involves the transfer of mass or substances between phases, such as gas-liquid, liquid-liquid, or solid-liquid.

• It occurs due to differences in concentration, temperature, pressure, or other driving forces.

• Examples of mass transfer include the evaporation of water from a wet surface, the diffusion of gases in the atmosphere, and the extraction of solutes from a l...read more

Chemical companies related to hiring for Diploma Chemical Engineers

• Pharmaceutical companies

• Petrochemical companies

• Fertilizer manufacturing companies

• Chemical manufacturing companies

• Paint and coatings companies

The chemical formula of toluene is C7H8.

• Chemical formula: C7H8

• Toluene is a common solvent used in various industries

• It is also known as methylbenzene

The question relates to the calculation of mass flux and the use of the Ja equation.

• Mass flux is a measure of the amount of mass passing through a given area per unit time.

• It is calculated by dividing the mass flow rate by the area.

• Ja is a dimensionless quantity used in the study of mass transfer.

• It represents the concentration gradient along a distance in a system.

• Ja is calculated using the diffusion coefficient (Dab) and the concentration gradient (dca/dz).

• Negative values o...read more

There are various types of heat exchangers including shell and tube, plate, and finned tube. They are used in industries like chemical, petrochemical, and HVAC.

• Shell and tube heat exchangers are commonly used in industries like chemical and petrochemical for high-pressure applications.

• Plate heat exchangers are compact and efficient, often used in HVAC systems and food processing.

• Finned tube heat exchangers are used in applications where heat transfer efficiency is crucial, su...read more

A pump is a mechanical device used to move fluids from one place to another. There are different types of pumps based on their working principle and application.

• Types of pumps include centrifugal pumps, positive displacement pumps, and specialty pumps like diaphragm pumps and peristaltic pumps.

• Centrifugal pumps work by converting rotational energy into kinetic energy to move the fluid.

• Positive displacement pumps trap a fixed amount of fluid and then force it into the discharg...read more

Chemical formula of acidic acid is CH3COOH and alcohol is C2H5OH.

• Acidic acid chemical formula: CH3COOH

• Alcohol chemical formula: C2H5OH

Haber process is a method used to produce ammonia through the reaction of nitrogen and hydrogen in the presence of an iron catalyst.

• The reaction equation is N2 + 3H2 -> 2NH3

• The process is carried out at high pressure (200 atm) and high temperature (450°C)

• Iron catalyst is used to speed up the reaction

• Ammonia is formed as a product

There are two main types of heart transplant: orthotopic and heterotopic.

• Orthotopic heart transplant involves replacing the patient's heart with a donor heart in the same anatomic position.

• Heterotopic heart transplant involves adding a donor heart to the patient's existing heart, creating a 'piggyback' circulation.

• Both types of heart transplant require careful matching of donor and recipient to minimize the risk of rejection.

Modes of heat transfer include conduction, convection, and radiation.

• Conduction: Heat transfer through direct contact between materials (e.g. touching a hot pan)

• Convection: Heat transfer through the movement of fluids or gases (e.g. boiling water)

• Radiation: Heat transfer through electromagnetic waves (e.g. feeling the warmth of the sun)

Centrifugal pump and gate valve are commonly used in chemical engineering.

• Centrifugal pump is commonly used for transferring liquids in chemical processes

• Gate valve is often used to control the flow of fluids in pipelines

• Other types of pumps include diaphragm pump, gear pump, and reciprocating pump

• Other types of valves include ball valve, globe valve, and butterfly valve

Chemical engineering has a bright future with increasing demand for sustainable and eco-friendly solutions.

• Growing demand for renewable energy sources

• Development of new materials and processes for sustainable manufacturing

• Advancements in nanotechnology and biotechnology

• Increasing focus on reducing carbon footprint

• Emerging markets in developing countries

• Integration of digital technologies in chemical engineering

Types of fluids include liquids, gases, and plasmas.

• Liquids - have a definite volume but no definite shape

• Gases - have neither a definite volume nor shape

• Plasmas - ionized gases with high energy levels

• Examples: water (liquid), air (gas), stars (plasma)

Electrolysis is a process where an electric current is passed through a substance to cause a chemical change.

• Electrolysis involves the decomposition of a compound into its elements using electricity.

• It is commonly used in industries for the production of metals like aluminum and sodium.

• Electrolysis is also used in electroplating processes to coat objects with a thin layer of metal.

• The process involves an electrolyte, electrodes, and an external power source.

Heat transfer is the process of energy moving from a warmer object to a cooler object.

• Heat transfer can occur through conduction, convection, or radiation.

• Conduction is the transfer of heat through direct contact between objects.

• Convection is the transfer of heat through the movement of fluids or gases.

• Radiation is the transfer of heat through electromagnetic waves.

• Examples include a metal spoon getting hot when placed in a hot drink (conduction), a radiator heating a room (c...read more

Distillation is a process used to separate components of a liquid mixture based on differences in boiling points.

• Distillation involves heating a 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, leaving behind components with higher boiling points.

• Common examples of distillation include the production of alcoholic beverages, purification of water, and separ...read more

Octane number is a measure of a fuel's ability to resist knocking or pinging in an internal combustion engine.

• Octane number indicates the quality of gasoline in terms of its resistance to knocking during combustion.

• Higher octane numbers mean the fuel is more resistant to knocking, allowing for higher compression ratios in engines.

• Octane number is determined through testing in a standardized engine and comparing the results to a mixture of iso-octane and n-heptane.

• Regular gaso...read more

I have experience working in an ammonia plant, including knowledge of the production process and safety protocols.

• Operated equipment for ammonia synthesis and purification

• Monitored and controlled process parameters to ensure efficiency and safety

• Performed routine maintenance and troubleshooting tasks

• Followed strict safety protocols to prevent accidents

• Collaborated with team members to optimize plant operations