20+ Chennai Petroleum Corporation Interview Questions and Answers

The steam turbines rotor puts load on the thrust bearing.

• The steam turbines rotor puts load on the thrust bearing.

• The thrust bearing is designed to handle the axial load generated by the rotor.

• Other bearings in the steam turbine, such as journal bearings, handle radial loads.

• The thrust bearing is typically located at the non-drive end of the rotor.

• Examples of thrust bearings used in steam turbines include tilting pad bearings and spherical roller bearings.

Centrifugal pump alignment dial gauge is used to ensure proper alignment of the pump shaft and motor shaft.

• Dial gauge helps in measuring the misalignment between the pump and motor shafts.

• It ensures that the pump operates smoothly and efficiently.

• Misalignment can cause vibration, noise, and premature wear and tear of the pump components.

• Dial gauge readings are used to adjust the pump and motor positions for proper alignment.

• Proper alignment also reduces energy consumption and...read more

I prefer to discuss topics related to process control in chemical engineering.

• Process control: I find the principles and techniques of process control fascinating.

• Control systems: I enjoy discussing the design and optimization of control systems in chemical processes.

• Instrumentation: I am interested in the various instruments used in chemical engineering and their applications.

• Automation: I find the automation of chemical processes and the use of advanced control strategies i...read more

7018 rod is used for welding thicker metals and has a higher tensile strength than 6018 rod.

• 7018 rod has a higher tensile strength than 6018 rod

• 7018 rod is used for welding thicker metals

• 6018 rod is used for welding thinner metals

• 7018 rod requires more amperage than 6018 rod

• 6018 rod is easier to use for beginners

Urea is manufactured through the Haber-Bosch process.

• The Haber-Bosch process is a chemical reaction that combines nitrogen and hydrogen to produce ammonia.

• The ammonia is then reacted with carbon dioxide to form urea.

• The process involves high pressure and temperature conditions.

• The reaction is catalyzed by iron-based catalysts.

• The urea produced is used as a fertilizer and in the production of plastics, resins, and adhesives.

The internal parts of a centrifugal pump include impeller, casing, shaft, bearings, and seals.

• Impeller is the rotating component that imparts energy to the fluid.

• Casing is the stationary component that encloses the impeller and directs the flow of fluid.

• Shaft connects the impeller to the motor and transmits power.

• Bearings support the shaft and reduce friction.

• Seals prevent leakage of fluid along the shaft.

• Other internal parts may include wear rings, diffusers, and volutes.

Lube oil number cod is needed to identify the type of lubricant used in machinery.

• Lube oil number cod helps in identifying the viscosity of the lubricant.

• It also helps in determining the type of base oil used in the lubricant.

• Different machinery requires different types of lubricants with specific viscosity and base oil.

• Lube oil number cod helps in ensuring the correct lubricant is used for the machinery.

• For example, a gas turbine may require a lubricant with a different lube...read more

The centrifugal external part is called impeller.

• The impeller is the rotating component of a centrifugal pump.

• It is responsible for transferring energy from the motor to the fluid being pumped.

• Examples of centrifugal pumps that use impellers include water pumps, chemical pumps, and sewage pumps.

TDC stands for Top Dead Center and BDC stands for Bottom Dead Center.

• TDC is the point where the piston is at its highest position in the cylinder.

• BDC is the point where the piston is at its lowest position in the cylinder.

• These terms are commonly used in internal combustion engines.

• The position of the piston at TDC and BDC is important for engine timing and performance.

• TDC and BDC are also used in reference to the position of the crankshaft.

• TDC and BDC are opposite points in ...read more

Cooling tower is used to remove heat from the water-cooled system and release it into the atmosphere.

• It is used in industries to cool down the water used in various processes.

• It works on the principle of evaporation.

• It helps in conserving water by recycling it.

• It is commonly used in power plants, chemical plants, and oil refineries.

• The tower is designed to maximize the contact between air and water to facilitate heat transfer.

Isometric drawing is a 3D representation of an object, while auto graphics drawing is a 2D representation of an object.

• Isometric drawing shows all three dimensions of an object in a single view.

• Auto graphics drawing is a 2D representation of an object, typically used in technical drawings.

• Isometric drawings are often used in engineering and architecture to show how an object will look in 3D.

• Auto graphics drawings are commonly used in manufacturing and engineering to show the ...read more

Safety in a plant refers to the measures taken to prevent accidents and injuries to workers and damage to equipment.

• Safety protocols and procedures should be established and followed strictly

• Workers should be trained on safety measures and provided with appropriate safety gear

• Regular maintenance and inspection of equipment and machinery

• Emergency response plans should be in place and practiced

• Regular safety audits and assessments should be conducted

• Examples of safety measures ...read more

The block diagram of a urea plant includes several stages such as synthesis, stripping, and granulation.

• The synthesis stage involves the reaction of ammonia and carbon dioxide to form ammonium carbamate, which is then dehydrated to form urea.

• The stripping stage involves the removal of excess ammonia and carbon dioxide from the urea solution.

• The granulation stage involves the formation of solid urea granules through a process of spraying and cooling.

• Other stages may include pu...read more

Prilled urea is obtained through a process called prilling, which involves the formation of small spherical pellets.

• Prilling is a method used to produce solid spherical particles.

• Urea is melted and then sprayed into a tower where it solidifies into small pellets.

• The pellets are then cooled and collected as prilled urea.

• Prilled urea is commonly used as a fertilizer due to its ease of handling and high nitrogen content.

1 bar is equal to 14.5038 PSI.

• 1 bar is a unit of pressure measurement in the metric system.

• PSI stands for pounds per square inch and is a unit of pressure measurement in the imperial system.

• 1 bar is equal to 100,000 Pascals (Pa) or 14.5038 PSI.

• This conversion is important in industries such as automotive and aerospace engineering.

There are 25.4 millimeters in one inch.

• 1 inch is equal to 25.4 millimeters.

• To convert inches to millimeters, multiply the number of inches by 25.4.

• To convert millimeters to inches, divide the number of millimeters by 25.4.

PPC stands for Pay-Per-Click, a model of internet marketing in which advertisers pay a fee each time one of their ads is clicked.

• PPC is a form of online advertising

• Advertisers bid on keywords and pay when their ad is clicked

• PPC can be used on search engines, social media platforms, and other websites

• PPC campaigns require careful planning and management to be effective

To calibrate a pressure transmitter, use a pressure calibrator to apply known pressure values and adjust the transmitter output accordingly.

• Use a pressure calibrator to generate known pressure values

• Connect the pressure calibrator to the pressure transmitter

• Adjust the output of the pressure transmitter based on the known pressure values

• Repeat the process at multiple pressure points to ensure accuracy

• Document the calibration process for record-keeping

There are four routes in 6G welding: 1G, 2G, 5G, and 6G.

• 6G welding is a type of welding that involves joining two pieces of metal at a 45-degree angle.

• The four routes in 6G welding are 1G, 2G, 5G, and 6G.

• Each route requires a different welding position and technique.

• 1G and 2G are considered easier routes, while 5G and 6G are more challenging.

• 5G and 6G require the welder to move around the pipe while welding, making it more difficult to maintain a consistent weld.

• 6G is the mos...read more

Chemical engineering involves the design, development, and operation of chemical processes and equipment.

• Chemical engineering applies principles of chemistry, physics, and mathematics to solve problems related to the production and use of chemicals and materials.

• Process design involves selecting the appropriate equipment, materials, and operating conditions to achieve the desired product quality and quantity.

• Chemical engineers work in a variety of industries, including pharma...read more

Loop checking a transmitter involves verifying the signal output and ensuring it matches the input signal.

• Verify the transmitter is receiving the correct input signal

• Check the transmitter output signal using a loop calibrator or multimeter

• Compare the output signal to the expected value based on the input signal

• Adjust the transmitter if necessary to ensure the output matches the input

Diesel hydrotreating unit is a process used to remove impurities from diesel fuel through hydrogenation.

• Diesel hydrotreating unit uses hydrogen to remove sulfur, nitrogen, and other impurities from diesel fuel.

• The process involves passing the diesel fuel over a catalyst in the presence of hydrogen gas.

• The catalyst helps to break down the impurities into simpler, more stable compounds.

• The treated diesel fuel has improved quality in terms of sulfur content, which is important f...read more

The units in cpcl refer to specific heat capacity at constant pressure and specific heat capacity at constant volume.

• Units in cpcl are typically in J/(kg*K) or kJ/(kg*K).

• Specific heat capacity at constant pressure is denoted as cp.

• Specific heat capacity at constant volume is denoted as cv.

• The ratio of cp to cv is denoted as gamma (γ).