90+ Inspection Engineer Interview Questions and Answers

The least count of a measuring instrument is the smallest value that can be measured by the instrument.

• The least count is determined by the smallest division on the scale of the instrument.

• It represents the precision or accuracy of the instrument.

• For example, a ruler with millimeter divisions has a least count of 1 mm.

• A Vernier caliper with divisions up to 0.1 mm has a least count of 0.1 mm.

• The least count is important in ensuring accurate measurements and minimizing errors.

The top cover of the MDPE pipe should be at ground level.

• The MDPE pipe should be installed in such a way that the top cover is level with the ground surface.

• This ensures that the pipe is adequately protected and prevents any damage or exposure.

• The top cover can vary depending on the specific requirements and regulations of the project.

• For example, in some cases, the top cover may need to be a minimum of 300mm, while in others it may be different.

• It is important to follow the ...read more

Diaphragm wall construction involves several steps including excavation, reinforcement placement, concrete pouring, and panel extraction.

• Excavation of a trench to the desired depth and width

• Installation of guide walls to maintain the trench dimensions

• Reinforcement cages are lowered into the trench and positioned correctly

• Concrete is poured into the trench, displacing the bentonite slurry

• Panel extraction is carried out to remove the guide walls and complete the diaphragm wall

Tractors have larger rear wheels for better traction, stability, and weight distribution.

• Larger rear wheels provide better traction on uneven or slippery surfaces.

• The weight of the tractor is primarily distributed towards the front due to the heavy engine and attachments. Larger rear wheels help balance the weight distribution.

• The larger surface area of the rear wheels helps in reducing ground pressure, preventing sinking or getting stuck in soft soil.

• The increased diameter o...read more

CGD field refers to the Corrosion and Gas Detection field in the inspection industry.

• CGD field involves inspecting and monitoring equipment and systems for corrosion and gas leaks.

• Inspection engineers in the CGD field use various techniques such as visual inspections, non-destructive testing, and gas detection equipment.

• They ensure compliance with safety regulations and standards to prevent accidents and equipment failures.

• Examples of equipment inspected in the CGD field incl...read more

There are several types of MDPE pipes used in various applications.

• MDPE stands for Medium Density Polyethylene.

• MDPE pipes are commonly used for gas and water distribution.

• Types of MDPE pipes include PE80 and PE100, which refer to the density and strength of the material.

• MDPE pipes are available in different sizes and pressure ratings.

• Examples of MDPE pipe applications include underground gas pipelines, water supply networks, and irrigation systems.

Various tests are performed on cables, transformers, and motors to ensure their proper functioning.

• Cables are tested for insulation resistance, continuity, and high voltage.

• Transformers are tested for turns ratio, insulation resistance, and winding resistance.

• Motors are tested for insulation resistance, winding resistance, and no-load and load current.

• Other tests may include temperature rise, partial discharge, and impulse voltage tests.

• Testing is important to ensure safety a...read more

MDPE pipe is a type of plastic pipe used in CGD for gas distribution.

• MDPE stands for Medium Density Polyethylene.

• It has a higher resistance to stress cracking and greater toughness than LDPE.

• MDPE pipes are used in CGD due to their flexibility, durability, and resistance to corrosion.

• They are also lightweight and easy to install.

• MDPE pipes are available in various sizes and pressure ratings.

• They are commonly used for gas distribution in residential, commercial, and industrial ...read more

Answering questions related to Material Grouping, P numbers, Code and Standards of Power Boiler Piping and Pressure Vessel's with ASME 31.1, ASME IX, and IBR 1950 Standard of Indian Boiler Manufacturing.

• Material Grouping is the classification of materials based on their chemical composition and mechanical properties.

• P numbers are assigned to each group of materials to indicate their weldability and compatibility with other materials.

• ASME 31.1 is the code for Power Piping and ...read more

The depth required for IGL gas laying depends on various factors such as soil type, traffic load, and depth of other utilities.

• The depth should be sufficient to prevent damage from external factors such as traffic load and soil type.

• The depth should also be deep enough to avoid interference with other utilities.

• The depth requirement may vary depending on the location and local regulations.

• For example, in Delhi, the minimum depth requirement for IGL gas laying is 1.2 meters.

• Th...read more

A power flow schematic diagram for a tractor.

• Start with the engine as the power source

• Show the power flow to the transmission

• Include the power flow to the wheels

• Illustrate any additional components such as hydraulic systems or electrical systems

Steps for pressure vessels inspection during maintenance include visual inspection, thickness measurement, non-destructive testing, and documentation.

• Perform visual inspection of the pressure vessel for any signs of damage or corrosion.

• Measure the thickness of the vessel walls using ultrasonic testing or other methods.

• Conduct non-destructive testing such as radiography or magnetic particle testing to detect any defects.

• Document all inspection findings and create a maintenance...read more

Calibration is the process of comparing a measurement device to a known standard to ensure accuracy. GD&T is a symbolic language used to communicate design intent on engineering drawings.

• Calibration ensures that measurement devices are accurate and reliable.

• GD&T symbols are used to specify the geometric requirements of a part on an engineering drawing.

• Examples of inspection instruments used earlier include vernier calipers, micrometers, bore gauges, and coordinate measuring m...read more

The hydrotest pressure of a vessel with MAWP=1MPa is typically 1.5 times the MAWP.

• Hydrotest pressure is usually 1.5 times the MAWP (Maximum Allowable Working Pressure)

• For MAWP=1MPa, the hydrotest pressure would be 1.5 MPa

• Hydrotest pressure ensures the vessel's structural integrity under pressure

There are several types of heat exchangers used in various industries.

• Shell and tube heat exchanger

• Plate heat exchanger

• Double pipe heat exchanger

• Spiral heat exchanger

• Air cooled heat exchanger

• Finned tube heat exchanger

W, H, R, P, and V represent different variables or parameters.

• W could represent weight or width

• H could represent height

• R could represent radius

• P could represent pressure

• V could represent volume

There are several types of PE used in different industries.

• Polyethylene (PE) is a thermoplastic polymer.

• Common types of PE include HDPE, LDPE, and LLDPE.

• HDPE (High-Density Polyethylene) is used for bottles, pipes, and containers.

• LDPE (Low-Density Polyethylene) is used for packaging films and coatings.

• LLDPE (Linear Low-Density Polyethylene) is used for flexible packaging and liners.

• Other types of PE include MDPE (Medium-Density Polyethylene) and UHMWPE (Ultra-High Molecular We...read more

PNGRB stands for Petroleum and Natural Gas Regulatory Board.

• PNGRB is a regulatory body established under the Petroleum and Natural Gas Regulatory Board Act, 2006.

• It is responsible for regulating the refining, processing, storage, transportation, distribution, marketing, and sale of petroleum, petroleum products, and natural gas.

• PNGRB grants licenses for the establishment and operation of petroleum and natural gas infrastructure.

• It also monitors and enforces compliance with re...read more

The documents required for the inspection of material and work include specifications, drawings, test plans, inspection reports, and certificates.

• Specifications: Provide detailed information about the required standards and quality of the material and work.

• Drawings: Illustrate the design and dimensions of the material and work to be inspected.

• Test plans: Outline the procedures and criteria for conducting tests on the material and work.

• Inspection reports: Document the findings...read more

The gap required in fit-up of pipes depends on the welding process and material being used.

• The gap for TIG welding is typically 1/16 to 1/8 inch.

• For MIG welding, the gap can be slightly larger, around 3/32 to 1/8 inch.

• The gap should be uniform along the entire length of the joint for proper welding.

• The material being welded also influences the gap size, with thicker materials requiring larger gaps.

Yes, I am knowledgeable in MS Word, Excel, and Vision.

• Proficient in creating and editing documents in MS Word

• Skilled in creating spreadsheets and analyzing data in MS Excel

• Familiar with using Vision for inspection and quality control purposes

Fittings used during charging depend on the type of refrigerant and system design.

• The type of refrigerant and system design determine the fittings used during charging.

• Common fittings include flare, sweat, and quick-connect fittings.

• Flare fittings are commonly used in air conditioning systems.

• Sweat fittings are commonly used in refrigeration systems.

• Quick-connect fittings are commonly used in automotive air conditioning systems.

• Proper fittings must be used to prevent leaks an...read more

Pipe is measured by its inner diameter, while tube is measured by its outer diameter.

• Pipe is used to transport fluids or gases, while tube is often used for structural applications.

• Pipe is typically manufactured to specific industry standards, while tube may have more varied dimensions and tolerances.

• Examples: PVC pipe for plumbing, steel tube for construction.

Inspection Engineer plays a crucial role in ensuring safety and reliability of CGD infrastructure.

• Conducting regular inspections of pipelines, valves, and other equipment to identify potential hazards or defects

• Developing and implementing inspection plans and procedures

• Collaborating with other departments to ensure compliance with safety regulations and standards

• Analyzing inspection data to identify trends and areas for improvement

• Providing recommendations for maintenance and...read more

X-ray film is commonly used for radiography testing.

• X-ray film is sensitive to X-ray radiation and produces an image when exposed.

• The film is placed behind the object being tested and exposed to X-rays.

• After exposure, the film is developed to reveal any defects or abnormalities.

• Common types of X-ray film include industrial radiographic film and medical radiographic film.

The instrument used for surface preparation is a sandblaster.

• Sandblaster is commonly used for surface preparation in industries like construction, automotive, and shipbuilding.

• It uses compressed air to propel abrasive material at high velocity to smooth out rough surfaces or remove contaminants.

• Examples of abrasive materials used in sandblasters include sand, garnet, and glass beads.

In weld visual inspection, we will see the quality of the weld and any defects present.

• Quality of the weld

• Presence of any defects

• Cracks, porosity, lack of fusion, undercutting, etc.

• Weld reinforcement and penetration

• Alignment and dimensions of the weld

• Surface finish and cleanliness

UTG stands for Ultrasonic Thickness Gauging, used for measuring thickness of materials. UT stands for Ultrasonic Testing, used for detecting flaws in materials.

• UTG is used for measuring thickness of materials, while UT is used for detecting flaws in materials

• UTG is commonly used in industries like construction and manufacturing to ensure material thickness meets specifications

• UT is commonly used in industries like aerospace and automotive for detecting cracks, voids, and othe...read more

Radial and Nylon are two types of tires used in vehicles.

• Radial tires have steel belts running perpendicular to the tread while Nylon tires have nylon cords running parallel to the tread.

• Radial tires provide better fuel efficiency and handling while Nylon tires offer better durability and resistance to punctures.

• Radial tires are more commonly used in passenger cars while Nylon tires are used in heavy-duty vehicles like trucks and buses.

Before commissioning a transformer, inspection can be done by following these steps:

• Check for any physical damage or signs of overheating on the transformer

• Inspect the insulation system for any signs of degradation or contamination

• Verify the correct installation of all components and connections

• Perform electrical tests to ensure proper functioning and performance

• Check the oil level and quality in oil-filled transformers

• Inspect the cooling system and ensure proper ventilation

• V...read more

To prepare welder qualification as per ASME, follow ASME Section IX guidelines, conduct welder performance qualification tests, and maintain records.

• Follow ASME Section IX guidelines for welder qualification

• Conduct welder performance qualification tests such as visual examination, bend test, and radiographic testing

• Maintain records of welder qualifications and requalification tests

• Ensure welders are trained and certified to perform specific welding procedures

• Regularly review ...read more

PERT & CPM are project management techniques used to plan, schedule, and control complex projects.

• PERT stands for Program Evaluation and Review Technique, while CPM stands for Critical Path Method.

• PERT is used for projects with high uncertainty and risk, while CPM is used for projects with well-defined activities and timelines.

• Both techniques involve breaking down a project into smaller tasks, estimating the time and resources required for each task, and creating a network di...read more

Heat exchangers can be inspected using various methods such as visual inspection, non-destructive testing, and cleaning.

• Visual inspection of the heat exchanger tubes and fins for any signs of corrosion, erosion, or damage.

• Non-destructive testing methods such as ultrasonic testing, radiography, and eddy current testing can be used to detect any defects or cracks in the heat exchanger.

• Cleaning the heat exchanger regularly to prevent fouling and blockages that can reduce its eff...read more

Inspection procedure for pressure vessel involves visual inspection, non-destructive testing, and documentation review.

• Visual inspection of the exterior and interior surfaces of the pressure vessel

• Non-destructive testing methods such as ultrasonic testing, radiography, and magnetic particle testing

• Review of documentation including design specifications, fabrication records, and previous inspection reports

QAP, WPS, and DFT are important documents used in inspection engineering.

• QAP stands for Quality Assurance Plan, which outlines the procedures and requirements for ensuring quality in a project or process.

• WPS stands for Welding Procedure Specification, which provides detailed instructions for performing welding operations.

• DFT stands for Dry Film Thickness, which refers to the thickness of a coating or paint applied to a surface.

• QAP ensures that quality standards are met throug...read more

Valves are devices used to control the flow of fluids or gases in a system.

• Gate valve: used to start or stop the flow of fluid by lifting or lowering a gate

• Ball valve: uses a rotating ball with a hole to control the flow

• Check valve: allows flow in one direction and prevents backflow

• Globe valve: controls flow by raising or lowering a disc against the flow

• Butterfly valve: uses a disc to control flow by rotating it

I have knowledge and experience in the oil and gas sector.

• I have studied the exploration, production, and refining processes of oil and gas.

• I am familiar with the equipment and machinery used in the industry.

• I have worked on inspection and maintenance of pipelines, tanks, and other facilities.

• I understand the safety regulations and environmental concerns related to the sector.

• I have knowledge of the market trends and pricing of oil and gas.

• I have experience working with multi...read more

An embankment is a raised structure made of soil or other materials used to support a roadway or railway track.

• Embankments are commonly used in transportation infrastructure to raise the level of the roadway or railway track above the surrounding terrain.

• They are typically made of soil, rock, or other materials that are compacted and shaped to form a stable structure.

• Embankments can also be used to control erosion along shorelines or riverbanks.

• Proper design and construction ...read more

Data required for fire & safety

• Building layout and floor plans

• Location of fire exits and emergency equipment

• Fire suppression systems and equipment

• Fire alarm and detection systems

• Emergency response plan and procedures

Pipe fit up should be checked for proper alignment, gap, and cleanliness.

• Check for proper alignment of pipes

• Ensure there is no gap between the pipes

• Inspect for cleanliness of the pipes

• Verify that the pipes are properly supported

• Check for any defects or damages in the pipes

IQI stands for Image Quality Indicator, used in radiography testing to ensure the quality of the radiographic image.

• IQI is a tool used to determine the quality of radiographic images by measuring the image quality parameters such as contrast, resolution, and sensitivity.

• It consists of a series of patterns or objects with specific details that are placed on the radiographic film along with the test object.

• The IQI is then exposed to the same conditions as the test object to eva...read more

Visual test involves using the naked eye to inspect a surface or material for defects or irregularities.

• Ensure proper lighting and angle for optimal visibility

• Look for cracks, corrosion, discoloration, or other abnormalities

• Compare with reference standards or previous inspections

• Use magnifying glasses or borescopes for closer examination

• Document findings and report any issues

The ratio of M25 concrete is 1:1:2

• The ratio of M25 concrete is 1 part cement, 1 part sand, and 2 parts aggregate

• This ratio is commonly used in construction for medium strength concrete

• For example, to make 1 cubic meter of M25 concrete, you would need 1/4 cubic meters of cement, 1/4 cubic meters of sand, and 1/2 cubic meters of aggregate

By visual inspection, measuring thickness, conducting hardness tests, and using non-destructive testing methods.

• Visual inspection for signs of rust and corrosion

• Measuring thickness using tools like ultrasonic thickness gauges

• Conducting hardness tests to check for degradation

• Using non-destructive testing methods like radiography or ultrasonic testing

• Referencing material specifications and standards for expected corrosion rates

Welding is a process of joining two or more metal pieces together by melting and fusing them.

• Welding involves the use of heat to melt the base metals and a filler material to form a joint.

• Common welding techniques include arc welding, MIG welding, TIG welding, and spot welding.

• Welding is used in various industries such as construction, automotive, aerospace, and manufacturing.

• Proper welding techniques are crucial for ensuring the strength and integrity of the joint.

• Welding in...read more

T4S is a regulatory body governed by PNGRB.

• T4S stands for Transmission System Service Provider

• It is responsible for regulating the transmission of natural gas in a country

• PNGRB stands for Petroleum and Natural Gas Regulatory Board

• PNGRB is the governing body that regulates the activities of T4S

• T4S ensures fair and efficient transmission of natural gas

• It sets tariffs, monitors compliance, and resolves disputes in the transmission sector

The pitch value of a drill hole can be measured using a pitch gauge or by calculating the distance between consecutive threads.

• Use a pitch gauge to directly measure the pitch value of the drill hole.

• If a pitch gauge is not available, measure the distance between consecutive threads and calculate the pitch value using the formula: pitch = distance / number of threads.

• Ensure accurate measurements by using precision tools and techniques.

• Example: If the distance between two conse...read more