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I applied via Job Portal and was interviewed in Dec 2024. There was 1 interview round.
I applied via Recruitment Consulltant
I applied via Naukri.com and was interviewed in Jan 2024. There were 2 interview rounds.
The pipe is injected with argon gas before welding to create an inert atmosphere.
Before welding, the pipe is purged with argon gas to remove any oxygen and moisture that could contaminate the weld.
This is typically done using a purge gas system that fills the pipe with argon and then vents it out before welding.
Purging with argon helps prevent oxidation and ensures a clean, strong weld.
Proper purging techniques are ess...
Metals such as stainless steel, carbon steel, and aluminum are commonly used before the welding process.
Stainless steel is often used for its corrosion resistance and durability.
Carbon steel is commonly used for its strength and affordability.
Aluminum is lightweight and has good conductivity, making it suitable for certain applications.
Dimensions of the elbow of unknown degree are calculated using trigonometry and geometry.
Calculate the centerline radius of the elbow.
Use trigonometry to find the length of the elbow.
Consider the angle of the elbow to determine the dimensions.
Measure the outside diameter and wall thickness of the pipe for accurate calculations.
ADNOC interview questions for popular designations
I applied via Recruitment Consulltant and was interviewed in Jan 2024. There was 1 interview round.
The three main things in a hydrotest test pack are pressure gauges, test pumps, and test plugs.
Pressure gauges are used to measure the pressure during the hydrotest.
Test pumps are used to generate the required pressure for the test.
Test plugs are used to seal off the openings in the system being tested.
Cement coating standards ensure the quality and durability of cross country pipelines.
Cement coating standards specify the thickness and composition of the coating.
Standards also define the application and curing processes for the coating.
Coating standards ensure protection against corrosion and mechanical damage.
Examples of cement coating standards include API RP 5L2 and ISO 21809-1.
Get interview-ready with Top ADNOC Interview Questions
In case of an emergency, I would remain calm, assess the situation, and take appropriate action to ensure the safety of all individuals involved.
Remain calm and assess the situation quickly
Follow emergency protocols and procedures
Ensure the safety of all individuals involved
Contact emergency services if necessary
Provide first aid or medical assistance if trained to do so
I applied via Approached by Company and was interviewed in Mar 2024. There was 1 interview round.
Before any confine space entry , we should know , such as Gas test , frequent fas test every 1 hrs , running air , blower on any manhole ,facial policy , guiding rope line , and every Hours , to be change working team or out side rest for 10 minute
I applied via Recruitment Consulltant and was interviewed in Dec 2023. There was 1 interview round.
I applied via Recruitment Consulltant and was interviewed in Oct 2023. There were 3 interview rounds.
Related oil &gas , experienced based quastions
I applied via Naukri.com and was interviewed in Nov 2022. There were 2 interview rounds.
The carbon percentage in carbon steel varies from 0.05% to 2.0% depending on the grade.
Carbon steel is an alloy of iron and carbon.
The amount of carbon in carbon steel determines its strength and hardness.
Low carbon steel contains less than 0.3% carbon, while high carbon steel contains more than 0.6% carbon.
Some common grades of carbon steel and their carbon percentage are: A36 (0.26%), 1018 (0.18%), and 1045 (0.45%).
Concentric reducers have a common centerline while eccentric reducers have an offset centerline.
Concentric reducers are used in vertical piping systems to prevent accumulation of air pockets.
Eccentric reducers are used in horizontal piping systems to prevent accumulation of solids or liquids.
Concentric reducers are symmetrical while eccentric reducers are not.
Concentric reducers are easier to manufacture and install th
Reinforcement fittings are used to strengthen and support piping systems.
Common reinforcement fittings include tees, elbows, reducers, and couplings.
Telescoping fittings are used to adjust the length of piping systems.
Flange fittings are used to connect pipes to other equipment or structures.
Saddles are used to support piping systems on walls or ceilings.
Reinforcement fittings can be made of various materials, includin...
Elbow lets change the direction of flow in piping system.
Elbows are used to change the direction of flow in a piping system.
They come in different angles such as 45°, 90° and 180°.
They are available in different materials such as PVC, copper, steel, etc.
Elbows can be welded or threaded onto the piping system.
They are commonly used in plumbing, HVAC, and industrial piping systems.
The bypass valve can be replaced by isolating the vessel, depressurizing it, and then replacing the valve.
Isolate the vessel by closing the inlet and outlet valves
Depressurize the vessel by venting the gas or liquid
Remove the old valve and install the new one
Repressurize the vessel and open the inlet and outlet valves
Permit to work is a formal written system used to control high-risk activities.
It is a document that outlines the work to be done and the hazards associated with it.
It is used to ensure that all necessary safety precautions are taken before work begins.
It is issued by a competent authority and must be signed by all parties involved in the work.
Examples include hot work permits, confined space permits, and excavation pe
Isolation is the process of separating a system or equipment from its energy source to ensure safety during maintenance or repair.
Isolation involves disconnecting a system or equipment from its power source, locking it out, and tagging it to prevent accidental re-energization.
There are two types of isolation: electrical isolation and mechanical isolation.
Electrical isolation involves disconnecting the electrical supply...
Positive isolation is the process of completely isolating a section of a system to prevent any flow or transfer of material.
Positive isolation is achieved by using valves, blinds, or other physical barriers to completely block the flow of material.
It is important for safety and maintenance purposes, as it allows workers to safely perform tasks without the risk of exposure to hazardous materials.
Examples of positive iso...
Positive isolation is the process of completely isolating a section of piping or equipment from the rest of the system to perform maintenance or repairs.
Identify the section of piping or equipment that needs to be isolated
Close all valves and block all lines leading to and from the section
Use blind flanges or spectacle blinds to physically block the section
Ensure that the isolation is secure and pressure tested before ...
Nitrogen purging is done to remove impurities and oxygen from pipelines before commissioning or maintenance work.
Nitrogen purging is done to create an inert atmosphere inside the pipeline to prevent explosions or fires.
It is required before commissioning or maintenance work to remove impurities and oxygen from the pipeline.
Nitrogen purging is also done to prevent corrosion and contamination of the pipeline.
It is common...
Pipes are used to transport fluids and gases, while tubes are used for structural purposes.
Pipes have a standardized outer diameter and wall thickness, while tubes have a standardized inner diameter and wall thickness.
Pipes are typically round, while tubes can be round, square, or rectangular.
Pipes are often used in plumbing and HVAC systems, while tubes are used in construction and engineering applications.
Pipes are u...
I have experience working with various pipe materials and standards including carbon steel, stainless steel, and PVC.
I have worked with carbon steel pipes in a power plant project.
I have also worked with stainless steel pipes in a pharmaceutical plant project.
In a water treatment plant project, I have worked with PVC pipes.
I am familiar with ASME B31.3, API 5L, and ASTM standards for pipe materials and welding procedur
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The duration of ADNOC interview process can vary, but typically it takes about less than 2 weeks to complete.
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