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Operator Zone – Oil & Gas Interview Questions

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Asked: March 16, 2025

What is Process of NHT Unit ?

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The Naphtha Hydrotreater (NHT) unit is an essential part of a refinery, particularly in the production of high-quality naphtha. The primary function of the NHT unit is to remove impurities such as sulfur, nitrogen, oxygen, and metals from the naphtha ...

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Asked: March 16, 2025

What is MS Block ?

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  In the oil and gas industry, particularly in refining, Motor Spirit (MS) refers to gasoline or petrol – the fuel used in internal combustion engines in vehicles. The term “block” in this context likely refers to a production block or ...

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Asked: March 16, 2025

what is Tankfarm ?

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A tank farm (also known as a storage tank farm) is a facility where large quantities of liquids, such as oil, chemicals, or liquefied natural gas (LNG), are stored in large tanks. These tanks are usually designed to safely store ...

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Asked: March 15, 2025

How Many Types of Crude Oil – Classification of Crude Oil ?

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Crude oil can be classified into several types based on its characteristics, such as density, sulfur content, and origin. These characteristics significantly influence how crude oil is refined and its final uses. Here are the main types of crude oil: 1. ...

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Asked: March 15, 2025

What is Safety?

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Safety refers to the condition of being protected from harm, danger, or risk. In the context of the workplace or daily life, safety involves taking steps to prevent accidents, injuries, and other negative outcomes by identifying hazards, minimizing risks, and ...

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Asked: March 15, 2025

What is PSM in Safety ?

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PSM stands for Process Safety Management. It is a regulatory framework and system designed to help companies prevent and manage the risks associated with the handling of hazardous chemicals and processes. The goal of PSM is to protect employees, the ...

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Asked: March 15, 2025

What is OSHA?

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OSHA stands for the Occupational Safety and Health Administration, which is a division of the U.S. Department of Labor. OSHA was created by the Occupational Safety and Health Act of 1970 to ensure safe and healthy working conditions for employees ...

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Asked: March 15, 2025

Hot To changeover Centrifugal Pump?

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Changing over a centrifugal pump (whether to a standby pump, from one service to another, or switching operation modes) involves a few important steps to ensure safety, maintain system efficiency, and prevent damage to the pump or system. The process ...

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Asked: March 15, 2025

Hot To start Centrifugal Pump?

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Starting a centrifugal pump involves several steps to ensure that the pump operates efficiently and safely. The process can vary slightly depending on the specific pump and system, but here is a general guide to starting a centrifugal pump: Steps to ...

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Asked: March 15, 2025

What is Catalyst ? Give Examples

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A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. It lowers the activation energy required for the reaction to occur, allowing the reaction to proceed faster and more efficiently. After ...

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Which product stream is the primary output of a CCR unit?

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In CCR, continuous catalyst regeneration is used mainly to:

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The typical temperature at the bottom of the CDU column is around?

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The main function of the reflux is to:

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