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I applied via Referral and was interviewed in Oct 2021. There were 5 interview rounds.
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Aarvi Encon interview questions for popular designations
LEL stands for Lower Explosive Limit. Important gases for gas test prior to hot work in red zone are methane, propane, butane, hydrogen, and acetylene.
LEL is the minimum concentration of a gas or vapor in air that can ignite and burn
Gas test is done to ensure that the atmosphere is safe for hot work
Important gases for gas test include methane, propane, butane, hydrogen, and acetylene
LEL is expressed as a percentage of ...
Get interview-ready with Top Aarvi Encon Interview Questions
I applied via Naukri.com and was interviewed before Apr 2022. There were 2 interview rounds.
I applied via Naukri.com and was interviewed in Mar 2021. There were 4 interview rounds.
I applied via Naukri.com and was interviewed in Oct 2021. There were 3 interview rounds.
I applied via Naukri.com and was interviewed before Dec 2020. There was 1 interview round.
The process of cross country pipeline project involves planning, designing, construction, testing, and commissioning.
Planning and feasibility study
Design and engineering
Procurement of materials and equipment
Construction and installation
Testing and commissioning
Operation and maintenance
Various codes and standards are followed for laying pipelines to ensure safety and quality.
API 1104 - Welding of Pipelines and Related Facilities
ASME B31.4 - Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids
ASME B31.8 - Gas Transmission and Distribution Piping Systems
ISO 13623 - Petroleum and Natural Gas Industries - Pipeline Transportation Systems
DOT Pipeline Safety Regulations - 49 CFR Parts 1
Hydrotest is a pressure test conducted on pipelines to check for leaks or defects.
Hydrotest involves filling the pipeline with water and pressurizing it to a specified level.
The pressure is maintained for a specified duration to check for any leaks or defects.
The test also checks the integrity of the pipeline and its ability to withstand the operating pressure.
The test is usually conducted before commissioning the pipe...
Hydrotest involves filling the equipment with water and pressurizing it to check for leaks or defects.
Equipment is filled with water and pressurized to a specified level
Pressure gauges are used to monitor the pressure
The equipment is held at the specified pressure for a set amount of time
After the test, the water is drained and the equipment is inspected for leaks or defects
Equipment and instruments used include pumps,
The instrument used in joint coating process is a profile gauge. Acceptance criteria for surface roughness is specified in the project specifications.
Profile gauge is used to measure the surface roughness of the joint coating.
Acceptance criteria for surface roughness is specified in the project specifications.
Surface roughness is measured in microns or mils.
Surface roughness should be within the specified range for the
Vent pipe is used to equalize the pressure inside and outside the casing during installation of pipelines.
Vent pipe is installed in the annular space between the carrier pipe and casing.
It helps to prevent the formation of a vacuum or pressure differential during installation.
It also allows for the escape of air or gas trapped in the annular space.
Vent pipe should be installed at the highest point of the casing.
It shou...
Major defects in welding and how to eliminate them
Porosity
Incomplete fusion
Cracks
Undercutting
Lack of penetration
Contamination
Improper electrode storage
Proper welding technique and equipment maintenance can eliminate most defects
WPS is a welding procedure specification, WQT is a welding qualification test, PQR is a procedure qualification record, and PQT is a performance qualification test.
WPS is a document that outlines the welding process to be used for a specific job
WQT is a test that ensures the welder is qualified to perform the welding process outlined in the WPS
PQR is a record that documents the results of a welding procedure qualificat...
Disbondment in cold bend pipe can be checked using visual inspection, ultrasonic testing, and radiography.
Visual inspection can detect disbondment on the surface of the pipe.
Ultrasonic testing can detect disbondment in the pipe wall by sending high-frequency sound waves through the pipe.
Radiography can detect disbondment by using X-rays or gamma rays to create an image of the pipe's internal structure.
Disbondment can a...
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