Hindustan Petroleum Refinery Operator Interview Questions and Answers

GK/GS
Technical
Maths
General English

Q1. Disttilation column
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Q2. Process operation
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Q1. What is Ohm's law?
Ans. 
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.
• Ohm's law is expressed as V = I * R, where V is the voltage, I is the current, and R is the resistance.

• It helps in calculating the current, voltage, or resistance in a circuit when the other two values are known.

• For example, if a circuit has a vol...read more
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Q2. 3 face induction motor
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Q3. Solar related questions
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Q4. Final year project related questions
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Q1. Thenical question,basic knowledge
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Q1. Basic knowledge, electrical related questions
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Tell me about yourself and various question screening question why you want to join our company

Q1. Tell me about yourself, resume, projects
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My aptitude test was to good and I cleared it in first round

Q1. What is the first law of gas laws?
Ans. 
The first law of gas laws is Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume at a constant temperature.
• Boyle's Law states that P1V1 = P2V2, where P represents pressure and V represents volume.

• This law is based on the principle that as the volume of a gas decreases, the pressure increases, and vice versa.

• Boyle's Law is commonly used in scuba diving to understand how changes i...read more
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Q2. What are G-codes and M-codes in CNC machines?
Ans. 
G-codes and M-codes are programming languages used in CNC machines to control various functions and operations.
• G-codes are used to command specific movements and functions, such as cutting speed and tool positioning

• M-codes are used to activate auxiliary functions like coolant systems or tool changes

• Examples of G-codes include G00 for rapid movement and G01 for linear interpolation

• Examples of M-codes include M06 for too
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Q1. What is your ambition
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My ambition is to become a successful entrepreneur and make a positive impact on society through innovative business ventures.
• To start my own company and create products/services that solve real-world problems

• To build a strong network of professionals and mentors in the business world

• To continuously learn and adapt to the changing market trends

• To give back to the community through philanthropic initiatives
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Q2. Is lpg or cng is safer for cooking gas
Ans. 
LPG is safer for cooking gas compared to CNG.
• LPG has a higher ignition temperature than CNG, making it safer.

• LPG is stored in liquid form, which reduces the risk of leaks compared to CNG stored in gas form.

• CNG is lighter than air and can easily disperse, increasing the risk of fire or explosion.

• LPG is widely used for cooking in households and has a proven safety record.

• CNG is more commonly used as a fuel for vehicles r
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