70+ Tech Mahindra Interview Questions and Answers

The least count of an Auto level is the smallest measurement that can be read. Auto levels are used for leveling and measuring heights.

• The least count of an Auto level is usually 0.5 mm

• Auto levels are used for leveling and measuring heights of different points on a site

• They are used to determine the difference in height between two points

• Auto levels are also used to establish a horizontal line of sight

• They are commonly used in construction and surveying

Civil engineers play a crucial role in the construction field and management.

• Designing and planning construction projects

• Ensuring compliance with building codes and regulations

• Managing budgets and resources

• Overseeing construction progress and quality

• Collaborating with architects, contractors, and other professionals

• Ensuring safety and environmental standards are met

• Providing technical advice and solutions to problems

• Maintaining project documentation and records

BBS & Abstract measurements sheet can be prepared by following a systematic approach.

• Understand the project requirements and specifications

• Identify the elements and quantities to be measured

• Prepare a detailed drawing or plan of the structure

• Calculate the total quantities of materials required

• Prepare a Bill of Quantities (BOQ) and Abstract measurements sheet

• Ensure accuracy and consistency in measurements

• Update the BBS and Abstract measurements sheet as required

Testing is a process of evaluating the performance or characteristics of a substance or system.

• Testing involves conducting experiments or analyses to gather data and draw conclusions.

• It is used to ensure the quality, safety, and effectiveness of products or processes.

• Chemical testing may involve analyzing the composition, purity, or properties of substances.

• Testing methods can include physical, chemical, or biological techniques.

• Examples of testing in chemistry include titrat...read more

Precautions during bridge construction include proper planning, quality control, safety measures, environmental considerations, and regular inspections.

• Thorough planning and design to ensure structural integrity and stability

• Quality control measures to ensure the use of high-quality materials and proper construction techniques

• Implementation of safety measures to protect workers and the public, such as fall protection systems and traffic control

• Consideration of environmental i...read more

The length of reinforcement steel in a bar bending schedule can be calculated by measuring the total length of each bar and accounting for any overlaps or bends.

• Measure the length of each bar in the bar bending schedule

• Account for any overlaps or bends in the reinforcement steel

• Add up the lengths of all the bars to calculate the total length of reinforcement steel

I would handle technical queries by providing clear and concise explanations and support to both clients and marketing teams.

• Listen carefully to the client's query and ask clarifying questions if necessary

• Provide clear and concise explanations in non-technical language

• Offer support and guidance throughout the project or enquiry process

• Collaborate with the marketing team to provide technical support during new enquiries

• Stay up-to-date with industry trends and developments to p...read more

The heat treatment process used in Sa516 grad 70 plate is called normalizing.

• Normalizing involves heating the plate to a temperature above its critical range and then cooling it in still air.

• This process helps to refine the grain structure and improve the mechanical properties of the plate.

• It also relieves internal stresses and enhances the plate's resistance to brittle fracture.

• Normalizing is typically performed after the plate has been formed and welded.

• The specific tempera...read more

The initial process of works execution involves planning, designing, and obtaining necessary permits and approvals.

• Conduct site investigation and survey

• Develop project plan and design

• Obtain necessary permits and approvals

• Mobilize resources and equipment

• Establish project schedule and budget

No, I do not have experience in running refinery inspection and advanced NDT methods.

• I have experience in other areas of branch management

• I am willing to learn and adapt to new methods

• I can manage and lead a team effectively

The number and types of pipes used in a water project vary depending on the specific project requirements.

• The number of pipes used in a water project can range from a few to hundreds or even thousands, depending on the scale of the project.

• Common types of pipes used in water projects include PVC pipes, HDPE pipes, ductile iron pipes, and steel pipes.

• The specific types of pipes used in a water project depend on factors such as the water source, water quality, pressure requirem...read more

Line of fire refers to the path of a potential hazard between a worker and the source of the hazard. Human nature can lead to complacency or lack of awareness when working in the line of fire.

• Line of fire is the path where a worker could be injured by a moving object, such as a swinging door or a vehicle backing up.

• Human nature may cause workers to become distracted or not pay attention to their surroundings, increasing the risk of being in the line of fire.

• Examples include a...read more

There are various types of risks and hazards in the construction industry, including falls, electrocution, and exposure to hazardous materials.

• Falls from heights due to lack of fall protection measures

• Electrocution from exposed wiring or faulty equipment

• Exposure to hazardous materials such as asbestos, lead, or silica dust

• Struck-by accidents from falling objects or moving equipment

• Caught-in/between accidents involving machinery or collapsing structures

No, Sa105 pipe does not have hard punch on the OD of the pipe.

• Sa105 pipe is a carbon steel pipe used in high-pressure and high-temperature applications.

• It is typically manufactured with smooth surfaces and no hard punches on the OD.

• Any irregularities on the OD of the pipe can affect its performance and integrity.

• Sa105 pipe is commonly used in the oil and gas industry for pipelines, refineries, and petrochemical plants.

A visa with family visa allows the holder to bring their family members with them to the country, while a visa without family visa does not permit this.

• Visa with family visa allows the holder to sponsor their spouse and children to join them in the country.

• Visa without family visa only permits the holder to enter the country alone.

• Some countries offer different types of visas for individuals traveling with or without their family members.

AFR testing is a process of measuring the air-to-fuel ratio in an engine to optimize its performance and reduce emissions.

• AFR stands for Air-Fuel Ratio

• It is commonly used in automotive and aviation industries

• The ideal AFR varies depending on the type of fuel and engine

• AFR testing can be done using a wideband oxygen sensor or a gas analyzer

HPLC is a chromatography technique used to separate compounds in a mixture based on their interactions with a stationary phase and a mobile phase.

• HPLC stands for High Performance Liquid Chromatography.

• It involves a stationary phase (usually a column packed with particles) and a mobile phase (liquid solvent).

• Compounds in the mixture interact differently with the stationary phase, leading to separation based on their properties like size, polarity, and charge.

• The separated comp...read more

Ultrasonic testing gauges the remaining life of a component by analyzing the thickness and integrity of the material.

• Measure thickness of material using ultrasonic waves

• Analyze any defects or corrosion present in the material

• Compare results with industry standards to determine remaining life

• Consider factors like material type, operating conditions, and previous maintenance history

• Provide recommendations for repair or replacement based on findings

The different types of food nutrients are called macronutrients and micronutrients.

• Macronutrients are nutrients that are required in large amounts by the body, including carbohydrates, proteins, and fats.

• Micronutrients are nutrients that are required in smaller amounts by the body, including vitamins and minerals.

• Examples of macronutrients include rice (carbohydrates), chicken (protein), and olive oil (fat).

• Examples of micronutrients include vitamin C (ascorbic acid) and iron...read more

Environmental testing is crucial for ensuring the safety of our surroundings and preventing harm to human health.

• Identifies potential hazards and risks to human health and the environment

• Helps in developing and implementing effective pollution control measures

• Ensures compliance with environmental regulations and standards

• Examples include testing for air and water quality, soil contamination, and hazardous waste disposal

• Environmental testing is important in industries such as ...read more

Principles of HPLC, UV, titration, and ALCOA.

• HPLC principle involves separation of components in a mixture using high pressure liquid chromatography.

• UV principle involves the measurement of the absorbance of light by a sample at a specific wavelength.

• Titration principle involves the determination of the concentration of a solution by reacting it with a standard solution of known concentration.

• ALCOA principle stands for Attributable, Legible, Contemporaneous, Original, and Acc...read more

The number of registers in the security gate depends on the size and complexity of the gate system.

• The number of registers can vary depending on the type of security gate being used.

• Some security gates may have multiple registers for different types of access control.

• The number of registers may also depend on the size and complexity of the gate system.

• Registers may include biometric scanners, keypads, card readers, and other access control devices.

The critical angle in UT process is the angle at which the sound wave is refracted instead of being reflected back.

• Critical angle is the angle at which the sound wave is refracted instead of being reflected back

• It is the angle at which the sound wave enters the material at a certain angle and is no longer able to continue through the material

• It is important to know the critical angle in UT process to ensure accurate inspection results

• For example, if the critical angle is not ...read more

To improve team as per market demands, focus on training, communication, and staying up-to-date with industry trends.

• Provide regular training sessions to keep team members up-to-date with industry trends and best practices

• Encourage open communication and collaboration within the team to foster a culture of innovation and problem-solving

• Stay informed about market demands and adjust team goals and strategies accordingly

• Offer incentives and recognition for team members who go ab...read more

The mixing ratio of M25 concrete is 1:1:2 (cement:sand:aggregate).

• Mixing ratio of M25 concrete is 1:1:2 (cement:sand:aggregate)

• This means for every part of cement, there is an equal part of sand and two parts of aggregate

• For example, if you have 1 kg of cement, you would need 1 kg of sand and 2 kg of aggregate

I know various parameters related to chemistry such as temperature, pressure, concentration, pH, etc.

• Temperature

• Pressure

• Concentration

• pH

• Molarity

• Molality

• Density

• Viscosity

• Refractive index

Interface is a contract with no implementation, while abstract class can have some implementation.

• Interface cannot have any implementation, only method signatures

• Abstract class can have both abstract methods and concrete methods

• A class can implement multiple interfaces but can only inherit from one abstract class

• Interfaces are used to achieve multiple inheritance in Java

Pore cut test is a method to determine the permeability of soil.

• It involves cutting a small cylindrical sample of soil and measuring the time it takes for water to flow through it.

• The test helps in determining the suitability of soil for construction purposes.

• It is commonly used in civil engineering and geotechnical investigations.

• The test results can also be used to estimate the rate of settlement of soil.

• Pore cut test is a simple and inexpensive method of soil testing.

AFR stands for Air Fuel Ratio, a critical parameter in combustion processes.

• AFR is the ratio of air to fuel in an internal combustion engine.

• It is measured using a device called an oxygen sensor.

• The ideal AFR varies depending on the type of fuel and engine.

• A lean AFR (more air, less fuel) can improve fuel efficiency but may cause engine damage.

• A rich AFR (more fuel, less air) can improve performance but may increase emissions.

• AFR is important for optimizing engine performance...read more

Acceptance criteria for magnetic particle testing are based on industry standards and specifications.

• Acceptance criteria are determined by the relevant industry standards and specifications

• Criteria may include size, shape, location, and quantity of indications

• Acceptance criteria may vary depending on the material being tested and the specific application

• Examples of standards include ASTM E1444, ASME Section V, and ISO 9934

Credit memo in GST can be passed till the filing of the return for September of the following year.

• Credit memo in GST can be passed till the filing of the return for September of the following year.

• The credit memo should be passed before filing the return for September of the following year.

• After the specified date, the credit memo cannot be passed in GST.

The question is about symbols, types of pole, principle of rectifier and its working.

• Symbols used in electrical engineering include resistor, capacitor, inductor, etc.

• Types of poles include north and south poles in magnets and positive and negative poles in batteries.

• The principle of rectifier is to convert AC to DC.

• Rectifiers can be half-wave or full-wave.

• Working of rectifier involves the use of diodes to allow current flow in one direction only.

As a Senior EHS Officer, you can handle multiple tasks such as developing safety programs, conducting audits, training employees, and managing regulatory compliance.

• Developing and implementing safety programs and policies

• Conducting safety audits and inspections

• Training employees on safety procedures and protocols

• Managing regulatory compliance with OSHA and other relevant agencies

• Investigating incidents and accidents to determine root causes and prevent future occurrences

The least count of a lathe machine is the smallest measurement that can be read or measured by the machine.

• The least count of a lathe machine is typically determined by the number of divisions on the main scale and the number of divisions on the Vernier scale.

• For example, if the main scale has 1 mm divisions and the Vernier scale has 10 divisions that cover 9 mm, the least count would be 0.1 mm.

• The least count is important for accurately measuring dimensions and ensuring prec...read more

The tool used for boring machine is called a boring bar.

• Boring bar is a cutting tool used in machining to create holes with precise dimensions and smooth finishes.

• It is commonly used in metalworking and woodworking industries.

• Examples of boring bars include solid carbide bars, indexable insert bars, and adjustable bars.

Yes, I have experience conducting lab testing in various settings.

• I have conducted lab testing in academic research labs during my undergraduate studies.

• I have also performed lab testing in a clinical setting during my internship at a hospital.

• I am familiar with using various lab equipment and following standard operating procedures for accurate results.

Testing is performed to ensure the quality, functionality, and reliability of the software or product.

• To identify defects or bugs in the software

• To ensure the software meets the requirements and specifications

• To validate that the software functions correctly

• To improve the overall quality of the software

• To build confidence in the software for stakeholders

• To comply with regulatory standards and requirements

A test is a procedure used to evaluate the functionality or performance of a system or component.

• Tests can be automated or manual

• Tests can be designed to check specific functionalities or to simulate real-world scenarios

• Examples of tests include unit testing, integration testing, regression testing, and performance testing

The type of electrical equipment used in a project depends on the project requirements and specifications.

• Power supplies

• Circuit breakers

• Transformers

• Switches

• Motors

• Generators

• Control panels

• Sensors

• Actuators

• Lighting systems

HPLC is a technique used to separate, identify, and quantify components in a mixture based on their interaction with a stationary phase and a mobile phase.

• HPLC stands for High-Performance Liquid Chromatography.

• It is widely used in various industries such as pharmaceuticals, food and beverage, environmental analysis, and forensic science.

• HPLC involves the use of a liquid mobile phase and a solid or liquid stationary phase.

• The sample mixture is injected into the HPLC system, an...read more

PSSR stands for Pre-Startup Safety Review. It is a systematic review of safety aspects before starting up a new or modified process.

• Ensures that all safety systems are in place and functioning properly before starting operations

• Identifies potential hazards and risks that may arise during startup

• Helps in preventing accidents and ensuring the safety of personnel and equipment

• Commonly used in industries such as oil and gas, chemical, and manufacturing

• Examples include checking em...read more

ASTM stands for American Society for Testing and Materials.

• ASTM is a globally recognized organization that develops and publishes technical standards for a wide range of materials, products, systems, and services.

• These standards are used by industries worldwide to ensure the quality and safety of products and processes.

• Examples of ASTM standards include ASTM D4236 for labeling art materials and ASTM A36 for structural steel.

DPT test acceptance criteria are based on the size, shape, and location of indications found during the test.

• Acceptance criteria may vary depending on the specific code or standard being followed.

• Indications that exceed the specified size, shape, or location criteria may result in rejection of the component.

• Acceptance criteria are typically outlined in the procedure or specification for the DPT test.

• Examples of acceptance criteria include maximum allowable indication size, di...read more

The type of cables used in a project depends on the application and requirements.

• Power cables for transmitting electrical power

• Data cables for transmitting digital signals

• Coaxial cables for high-frequency applications

• Fiber optic cables for high-speed data transmission

• Shielded cables for noise reduction

• Twisted pair cables for balanced signals

• Ribbon cables for flat and compact connections

To make goods clear, ensure proper labeling, organization, and documentation.

• Label all goods with clear and accurate information

• Organize goods in a systematic manner for easy access

• Maintain detailed documentation of goods inventory and movement

Current CTC is $80,000 and expected CTC is $100,000.

• Current CTC: $80,000

• Expected CTC: $100,000

Total stations are electronic/optical instruments used in surveying and construction to measure angles and distances.

• Total stations combine a theodolite for measuring angles with a distance meter to calculate distances.

• They use a laser beam to measure distances to objects.

• Total stations are commonly used in construction, civil engineering, and land surveying.

• They provide accurate measurements for mapping, setting out buildings, and monitoring structures.

• Total stations can sto...read more

Soil compaction is done to increase soil density, improve load-bearing capacity, reduce water infiltration, and enhance root growth.

• Increase soil density to improve stability and reduce settling

• Improve load-bearing capacity for construction projects

• Reduce water infiltration to prevent erosion and improve drainage

• Enhance root growth by providing a stable environment for plants

• Common methods include using heavy machinery like rollers or compactors

FDD tests are carried out by following a structured approach to identify defects in software development.

• FDD tests involve creating test cases based on functional requirements

• Tests are executed to verify if the software functions as expected

• Defects found during testing are logged and prioritized for resolution

• Regression testing is performed to ensure that fixes do not introduce new issues

Journal entries for accruals

• Accruals are used to record expenses or revenues that have been incurred but not yet paid or received.

• Accrued expenses are recorded with a debit to the expense account and a credit to the accrued liability account.

• Accrued revenues are recorded with a debit to the accrued asset account and a credit to the revenue account.

• Example of an accrued expense: Accrued salaries payable - Debit Salaries Expense, Credit Accrued Salaries Payable.

• Example of an ac...read more

Main concepts of OOP include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.

My typing speed is 70 words per minute.

• I have been practicing typing regularly to improve my speed.

• I am comfortable typing on both a standard keyboard and a laptop keyboard.

• I am able to type accurately without looking at the keyboard.

• I have experience typing various types of documents, including reports and emails.

Mechanical properties refer to the behavior of materials under applied forces, including strength, hardness, elasticity, and toughness.

• Mechanical properties include strength, hardness, elasticity, toughness, ductility, and brittleness.

• Strength is the ability of a material to withstand an applied force without failure.

• Hardness is the resistance of a material to deformation, scratching, or abrasion.

• Elasticity is the ability of a material to return to its original shape after de...read more

QAP stands for Quality Assurance Plan and ITP stands for Inspection and Test Plan.

• QAP outlines the quality control procedures and processes to be followed during a project.

• ITP details the specific inspections and tests that will be conducted to ensure quality standards are met.

• Both documents are essential for ensuring quality and compliance in projects.

HDPE liner is used for its durability, chemical resistance, and flexibility in various applications.

• HDPE liner is chosen for its high durability, able to withstand harsh environmental conditions.

• It is chemically resistant, making it ideal for use in containment systems for hazardous materials.

• HDPE liner is flexible, allowing it to conform to the shape of the surface it is being applied to.

• Common applications include landfill liners, pond liners, and secondary containment syst...read more

Dissolution criteria of S1, S2, S3

• Dissolution criteria refers to the amount of drug that should be dissolved in a specified time period

• S1, S2, and S3 are different dissolution media used for testing drug release

• The criteria for dissolution varies depending on the drug and its intended use

• For example, immediate-release tablets should dissolve at least 80% of the drug within 30 minutes in S1

• Extended-release tablets may have different dissolution criteria

Company name location is a question about where the company is located.

• Provide the name of the company

• Specify the location of the company

• Include any additional information about the company's location

Composite structure is a material made from two or more different materials with different physical or chemical properties.

• Composite structures are designed to combine the strengths of each material used.

• Examples include carbon fiber reinforced polymer (CFRP) and fiberglass reinforced plastic (FRP).

• They are commonly used in aerospace, automotive, and construction industries.

My cgpa is 3.8 out of 4.0.

• My cgpa is 3.8

• I achieved this cgpa out of a maximum of 4.0

• I have consistently maintained a high cgpa throughout my academic career

Coal and metal are both natural resources that are extracted from the earth and have various uses in different industries.

• Coal is a fossil fuel that is primarily used for electricity generation and heating.

• Metal ores are mined and processed to extract valuable metals like iron, copper, gold, etc.

• Coal mining involves underground or surface mining methods, while metal mining can include open-pit mining, underground mining, or placer mining.

• Both coal and metal mining operations ...read more

Testing processes are essential for ensuring the quality and safety of products or systems.

• Testing processes involve conducting various tests to evaluate the performance, reliability, and safety of products or systems.

• Types of testing processes include non-destructive testing, destructive testing, visual inspection, and dimensional inspection.

• Testing processes help identify defects, weaknesses, or areas for improvement in products or systems.

• Examples of testing processes incl...read more

RT and UT are non-destructive testing methods used in inspection to detect flaws in materials.

• RT stands for Radiographic Testing, which uses X-rays or gamma rays to inspect the internal structure of materials.

• UT stands for Ultrasonic Testing, which uses high frequency sound waves to detect flaws or measure thickness in materials.

• RT is commonly used for detecting internal defects in welds, castings, and forgings.

• UT is often used for inspecting welds, pipelines, and other struc...read more