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Chennai Petroleum Corporation Interview Questions and Answers
26 Interview questions
Ferranti effect refers to the phenomenon where voltage increases along a long transmission line due to capacitive charging.
Occurs in long transmission lines, especially under light load conditions.
Caused by the line's capacitance, which leads to voltage rise at the receiving end.
More pronounced in high-voltage AC systems.
Example: A long overhead transmission line may show a voltage increase at the far end compared...
Skin effect is the tendency of alternating current to flow near the surface of a conductor, increasing resistance at higher frequencies.
Occurs in conductors carrying alternating current (AC).
At higher frequencies, current density is greater near the surface.
Example: In a copper wire, AC flows more on the outer surface than in the center.
Skin depth is the distance from the surface where current density falls to 37%...
A transformer consists of key components that facilitate the transfer of electrical energy between circuits through electromagnetic induction.
Core: Made of laminated silicon steel to reduce energy losses.
Windings: Primary and secondary coils that transfer energy; e.g., copper or aluminum wire.
Insulation: Materials like oil or paper to prevent short circuits and ensure safety.
Tank: Enclosure that houses the core an...
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).
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 im...
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
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 c...
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 ...
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 cont...
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 ...
Chennai Petroleum Corporation Interview Experiences
18 interviews found
Anonymous
Selected
I applied via Company Website and was interviewed in Jul 2024. There was 1 interview round.
(6 Questions)
- Q1. Tell me about your self?
- Q2. What are your salary expectations?
- Q3. My name is chandhini, and I have done B.sc. In Bharathi women's College.
- Q4. Already I finish my higher studies and diploma in airlines tourism hospitality management.
- Q5. I would like to be compensated for my work so that I can provide for myself and my family
- Q6. My father is electrion and my mother is housewife I have 3 siblings
Interview Preparation Tips
- Questions
2. Meet new people.
3. Show up early.
4. Become a lifelong learner.
5. Check in with your career path once per year.
6. Search for the value in feedback or criticism.
7. Cultivate perseverance.
8. Keep your promises.
I applied via Company Website and was interviewed in Jun 2024. There was 1 interview round.
(2 Questions)
- Q1. What are the units in cpcl
- Ans.
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).
- Q2. What is diesel hydrotreating unit
- Ans.
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 improve...
Interview Preparation Tips
- Q1. Process explained
- Q2. Subject knowledge
I applied via LinkedIn and was interviewed in Aug 2023. There were 2 interview rounds.
Go through all the topics which will.cover in the Safety
(1 Question)
- Q1. Discussion about the ctc and job skills
Interview Preparation Tips
- Safety Management
- Industrial Safety
- Risk Management
- Excavation
- Lifting
(2 Questions)
- Q1. How will you loop check a transmitters
- Ans.
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
- Q2. How will you calibrate pressure transmitter
Interview Preparation Tips
I appeared for an interview before Apr 2024, where I was asked the following questions.
- Q1. What is mean by ferranti effect ?
- Q2. What is mean by skin effect?
- Ans.
Skin effect is the tendency of alternating current to flow near the surface of a conductor, increasing resistance at higher frequencies.
Occurs in conductors carrying alternating current (AC).
At higher frequencies, current density is greater near the surface.
Example: In a copper wire, AC flows more on the outer surface than in the center.
Skin depth is the distance from the surface where current density falls to 37% of i...
- Q3. What is transformer?
- Q4. What are the types of dc motors?
- Q5. What are the parts of transformer?
Selected
I applied via Campus Placement and was interviewed before Feb 2023. There were 3 interview rounds.
Basic Aptitude Sections, Mostly from GATE Syllabus
(1 Question)
- Q1. Technical Interview related to Chemical, Basically from Chemical Reaction Eng, Mass Transfer Operatio [Distillation] , Heat Transfer [Conduction Part, Convection and Radiation] Thermodynamics and Fluid Mec...
Topic on related to different aspects of Petroleum
Interview Preparation Tips
I applied via Walk-in and was interviewed in Jan 2022. There were 3 interview rounds.
(5 Questions)
- Q1. What is the centrifugal pump internal part.
- Q2. Why in a centrifugal pump alignment dial gauge using.
- Ans.
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 alig...
- Q3. What is the safety, In a plant.
- Ans.
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 a...
- Q4. What is the cooling tower purpose.
- Q5. What is the centrifugal extranal part name.
100000
Interview Preparation Tips
(2 Questions)
- Q1. Oil field related questions and technical norms details
- Q2. Ask your previous apprentice person
Interview Preparation Tips
I applied via Walk-in and was interviewed in Dec 2021. There were 2 interview rounds.
(3 Questions)
- Q1. What is the meaning in PPC
- Ans.
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
- Q2. How many routes in 6g weiding
- Ans.
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 ...
- Q3. What is the difference between in 7018 rod and 6018 rod
- Ans.
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
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Chennai Petroleum Corporation Interviews By Designations
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Instrumentation Technician
33
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|  ₹2 L/yr - ₹5.2 L/yr |
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Mechanical Technician
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| ₹1 L/yr - ₹2.3 L/yr |
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