100+ Executive Engineer Interview Questions and Answers

Technical interview questions for Executive Engineer position

• Memory leak is a situation where a program fails to release memory that is no longer needed

• Static variables in C are variables that retain their values between function calls

• Local variables are declared inside a function and have a limited scope, while global variables can be accessed from any part of the program

• Method overriding is a feature in object-oriented programming where a subclass provides a different imple...read more

The main contaminants in safe drinking water include bacteria, viruses, chemicals, heavy metals, and pesticides.

• Bacteria and viruses can cause waterborne diseases such as cholera, typhoid, and hepatitis.

• Chemicals like chlorine, fluoride, and lead can be present in water due to industrial pollution or outdated plumbing systems.

• Heavy metals such as arsenic, mercury, and cadmium can leach into water sources from natural deposits or industrial activities.

• Pesticides and herbicides...read more

Material balance is a fundamental concept in chemical engineering that involves accounting for the flow of materials into and out of a system.

• Material balance is used to determine the amount of material present in a system at any given time.

• It involves tracking the flow of materials into and out of the system, as well as any chemical reactions that may occur.

• The material balance equation is typically written as: Accumulation = Inflow - Outflow + Generation - Consumption.

• This ...read more

Various ways of distribution transformer protection include overcurrent protection, differential protection, and earth fault protection.

• Overcurrent protection involves the use of fuses or circuit breakers to protect the transformer from excessive current.

• Differential protection compares the current entering and leaving the transformer to detect any internal faults.

• Earth fault protection detects any fault between the transformer winding and earth, and trips the circuit to prev...read more

Submerged entry nozzles (SEN) are commonly used for slab cooling in continuous casting process.

• Submerged entry nozzles (SEN) are designed to deliver cooling water directly to the slab surface.

• SEN helps in controlling the solidification process and improving the quality of the slab.

• Examples of SEN manufacturers include Vesuvius, TATA Steel, and SMS group.

Heat duty is the amount of heat energy required to be transferred in a heat exchanger.

• Heat duty is calculated based on the temperature difference between the hot and cold fluids, and the flow rates of the fluids.

• Kern's method is a widely used method for designing heat exchangers.

• It involves calculating the overall heat transfer coefficient and the heat transfer area required for the given heat duty.

• The design process also involves selecting the appropriate type of heat exchan...read more

The interview question is about various aspects of tunnel execution engineering.

• Tunnel diameter is a crucial factor in determining the excavation area and the type of equipment to be used.

• Powder factor is the amount of explosive used per unit volume of rock. It affects the fragmentation of the rock and the safety of the workers.

• Total length of the tunnel is an important parameter in planning the excavation sequence and the support system.

• Shotcrete is used to stabilize the tun...read more

Mix design of concrete refers to the process of determining the proportions of various ingredients to achieve the desired properties of concrete.

• Mix design involves selecting the appropriate type and amount of cement, aggregates, water, and admixtures.

• The proportions are determined based on factors such as strength requirements, workability, durability, and environmental conditions.

• Various methods like the ACI method, British method, and DOE method can be used for mix design....read more

Chromium is added to stainless steel to increase its corrosion resistance and strength.

• Chromium forms a passive oxide layer on the surface of stainless steel, which prevents rusting and corrosion.

• Chromium also improves the hardenability of stainless steel, making it stronger and more durable.

• The amount of chromium added to stainless steel can vary, with higher percentages leading to better corrosion resistance.

• For example, 304 stainless steel contains 18% chromium, while 316 ...read more

External defects in continuous casting process include surface cracks, surface blowholes, and surface segregation.

• Surface cracks can occur due to improper cooling or excessive casting speed.

• Surface blowholes are caused by trapped gases in the molten metal.

• Surface segregation results from uneven distribution of alloying elements.

• Other external defects may include surface scabs and surface laps.

Internal casting defect in continuous casting refers to flaws or imperfections that occur within the casting material during the casting process.

• Internal shrinkage: caused by improper cooling or solidification of the casting material, leading to voids or cavities within the material.

• Inclusions: foreign particles or impurities that become trapped within the casting material, affecting its structural integrity.

• Segregation: uneven distribution of alloying elements or impurities ...read more

The unit of Brick Work is in cubic meters (m³), Cement Plaster is in square meters (m²), and RCC (Reinforced Cement Concrete) is in cubic meters (m³).

• Brick Work is measured in cubic meters (m³) as it refers to the volume of bricks used in construction.

• Cement Plaster is measured in square meters (m²) as it refers to the area covered by the plaster.

• RCC is measured in cubic meters (m³) as it refers to the volume of concrete used in reinforced structures.

The temperature achieved by 4 kg steam depends on the pressure and initial temperature of the steam.

• The temperature achieved by 4 kg steam can be calculated using the steam tables.

• The pressure and initial temperature of the steam must be known to calculate the final temperature.

• The specific heat capacity of water and steam must also be taken into account.

• Assuming standard atmospheric pressure, 4 kg of steam at 100°C will have a final temperature of 100°C.

• If the steam is at a ...read more

Nickel is added to stainless steel to improve its corrosion resistance, strength, and durability.

• Nickel increases the resistance of stainless steel to corrosion and oxidation

• Nickel improves the strength and toughness of stainless steel

• Nickel helps maintain the austenitic structure of stainless steel at high temperatures

• Nickel is often used in combination with other elements like chromium and molybdenum to enhance the properties of stainless steel

Over storage tanks are used to store excess water or other fluids for future use.

• Over storage tanks are typically used in industries, commercial buildings, and residential complexes.

• They help in managing water supply during peak demand periods.

• These tanks are usually located at a higher elevation to create pressure for distribution.

• They can store water from various sources like rainwater harvesting, municipal supply, or borewells.

• Over storage tanks often have additional featu...read more

Questions related to electrical engineering concepts such as star delta connection, distribution transformer, color coding of conductor, earthing vs grounding, machine efficiency and stability.

• Star delta connection is a method of starting three-phase induction motors.

• Distribution transformer is used to step down high voltage to low voltage for distribution purposes.

• Color coding of conductor is used to identify the function of each wire in a circuit.

• Earthing and grounding are ...read more

The boiling point is the temperature at which a liquid turns into a gas.

• It is a characteristic property of a substance.

• It depends on the pressure of the surroundings.

• The McCabe-Thiele method is used to determine the boiling point of a mixture.

• Water boils at 100 degrees Celsius at standard atmospheric pressure.

JSL Jajpur uses various types of casting machines including continuous casting machines and vertical casting machines.

• JSL Jajpur uses continuous casting machines for producing long, continuous shapes like rods, tubes, and beams.

• They also use vertical casting machines for producing solid shapes like ingots and slabs.

• Other types of casting machines used at JSL Jajpur may include horizontal casting machines and centrifugal casting machines.

Miniscus level in continuous casting refers to the level of molten metal in the mold during the casting process.

• Miniscus level should be maintained at a specific height to ensure proper solidification of the metal.

• Maintaining the miniscus level helps control the flow of metal and prevent defects in the final product.

• If the miniscus level is too high, it can lead to overflow and if it is too low, it can cause issues with the casting process.

• Proper monitoring and adjustment of ...read more

OPC Protocol is a standard for industrial communication. Testing can be done using OPC test clients and servers.

• OPC stands for OLE for Process Control

• OPC is a standard for communication between industrial devices and software applications

• OPC test clients and servers can be used to test communication

• OPC UA (Unified Architecture) is the latest version of the protocol

• Testing can include checking for data integrity, security, and reliability

The mcab-theile method is a technique used in electrical engineering for circuit analysis and design.

• It is used to convert a transfer function into a rational function

• It is commonly used in filter design

• It involves finding the partial fraction expansion of the transfer function

• It is named after its inventors, J. McAb and E. Theile

BBS stands for Bar Bending Schedule and Billings refer to the process of preparing invoices for construction work done.

• BBS is a document that lists the number, size, and shape of steel bars required for a construction project.

• It helps in estimating the amount of steel required and the cost of the project.

• Billings involve preparing invoices for the work done by the contractor or subcontractor.

• It includes details such as the quantity of work done, the rate charged, and the tota...read more

To prevent shrinkage cracks in castings, proper gating and risering design, controlling cooling rates, and using suitable alloys are essential.

• Design proper gating and risering systems to ensure proper flow of molten metal and minimize shrinkage

• Control cooling rates by using insulating materials or controlling the environment

• Use suitable alloys with low shrinkage characteristics to minimize the risk of cracks

• Implement proper feeding systems to compensate for shrinkage during ...read more

The question is unclear and does not make sense.

• The question needs to be rephrased or clarified.

• It is unclear what is meant by 'shape chlorine tonner in concave'.

• More information is needed to answer this question.

There are mainly 5 types of cement processes.

• Dry process

• Wet process

• Semi-dry process

• Semi-wet process

• Lepol process

Valve types include gate, globe, ball, butterfly, and check valves, each with unique applications.

• Gate valves are used for on/off control in pipelines

• Globe valves are used for regulating flow and pressure

• Ball valves are used for quick shut-off and control of flow

• Butterfly valves are used for low-pressure applications

• Check valves are used to prevent backflow

The tests for concrete and steel include cube test for concrete and tensile test for steel. If the cube test fails, additional tests like rebound hammer test or ultrasonic pulse velocity test can be performed.

• Concrete test: Cube test is performed to determine the compressive strength of concrete. A cube specimen is prepared and subjected to compressive load.

• Steel test: Tensile test is conducted to measure the strength and ductility of steel. A steel specimen is subjected to t...read more

Factors and requirements for procuring a conveyor belt

• Consider the type of material being transported

• Determine the required capacity and speed of the conveyor belt

• Evaluate the environment where the conveyor belt will be used (e.g. temperature, humidity)

• Assess the maintenance and operating costs of the conveyor belt

• Check the safety features and regulations compliance of the conveyor belt

• Look into the reputation and reliability of the manufacturer

• Consider the installation and s...read more

NAS value is a measure of network-attached storage performance and reliability, important to achieve within standard limits for optimal data storage and access.

• NAS value stands for Network-Attached Storage value, which measures the performance and reliability of a storage system.

• It is important to achieve NAS value within standard limits to ensure optimal data storage and access speeds.

• Exceeding NAS value limits can result in slower data transfer speeds, increased latency, an...read more

TIG welding is a welding process that uses a non-consumable tungsten electrode to produce the weld. It is widely used in jointing hydraulic pipes due to its precision and clean welds.

• TIG welding stands for Tungsten Inert Gas welding.

• It uses a non-consumable tungsten electrode to create the weld.

• TIG welding produces high-quality, clean welds with minimal spatter.

• The process allows for precise control over the welding arc, making it ideal for jointing hydraulic pipes.

• TIG weldin...read more

Three phase input voltage refers to the voltage supplied to a three-phase electrical system.

• Three phase input voltage is commonly used in industrial and commercial applications.

• It consists of three alternating currents that are 120 degrees out of phase with each other.

• The voltage can be expressed as a line-to-line voltage or a line-to-neutral voltage.

• In many countries, the standard three phase input voltage is 400 volts.

• Examples of three phase input voltage include 208V, 240V...read more

The question is about the GCV of coal, SFR, and boiler efficiency.

• GCV stands for Gross Calorific Value and is a measure of the heating value of coal.

• SFR stands for Steam Fuel Ratio and is the ratio of steam generated to fuel consumption.

• Boiler efficiency is the ratio of energy output to energy input.

• Efficiency can be improved by reducing excess air, improving combustion, and using high-quality fuel.

• The GCV of coal affects the amount of fuel required to generate a given amount...read more

The amount of square metres of shuttering done in a day by 1 carpenter and 1 helper varies based on factors like experience, efficiency, and complexity of the task.

• The square metres of shuttering done per day can range from 10-50 depending on the skill level and speed of the carpenter and helper.

• Factors such as the type of material used, complexity of the design, and availability of tools can also impact the amount of shuttering done in a day.

• For example, a highly skilled car...read more

The size of dog conductor depends on the current carrying capacity and the voltage rating of the electrical system.

• The size of the dog conductor is determined by the electrical load it needs to carry.

• The current carrying capacity of the conductor is directly proportional to its size.

• The voltage rating of the electrical system also plays a role in determining the size of the conductor.

• For example, a 20-ampere circuit requires a 12-gauge conductor, while a 30-ampere circuit req...read more

Yes

• Yes, I am familiar with transformers and their function in electrical power systems.

• Yes, I have knowledge of circuit breakers and their role in protecting electrical circuits from overloads and faults.

• Yes, I am familiar with relays and their use in controlling and protecting electrical circuits.

• Yes, I have experience working with electrical panels and their function in distributing and controlling electrical power.

PE80 and PE100 are both types of polyethylene pipes used for gas and water supply, but differ in their pressure ratings and material properties.

• PE80 has a lower maximum operating pressure than PE100

• PE100 has a higher density and is more resistant to stress cracking than PE80

• PE100 is typically used for higher pressure applications such as gas distribution

• PE80 is typically used for lower pressure applications such as water supply

• Both types of pipes have similar installation and...read more

Soundness test on cement is done to ensure that the cement does not expand or contract excessively, which can lead to cracking and failure. PSC gains similar strength to PPC due to the presence of pozzolanic materials which enhance the strength of the concrete.

• Soundness test on cement is important to ensure that the cement does not undergo excessive expansion or contraction, which can lead to cracks and failure in the concrete structures.

• Pozzolanic materials present in PSC (P...read more

The software used to extract data from the battery is Battery Management System (BMS).

• Battery Management System (BMS) is commonly used to extract data from the battery.

• BMS monitors the battery's state of charge, voltage, temperature, and other parameters.

• Examples of BMS software include Tesla's Powerwall app and Victron Energy's VRM Portal.

Position displacement pumps are used for hydraulic systems due to their ability to provide precise control over fluid flow and pressure.

• Position displacement pumps offer accurate and repeatable flow rates, making them ideal for applications requiring precise control.

• These pumps are capable of maintaining constant pressure, which is crucial in hydraulic systems to ensure consistent performance.

• Position displacement pumps are commonly used in industries such as automotive, aero...read more

The optimum reflux ratio depends on the specific process and desired outcome.

• The optimum reflux ratio is the ratio of the amount of liquid refluxed to the amount of liquid that is vaporized in a distillation column.

• It is determined by the specific process and desired outcome, such as purity or yield.

• A higher reflux ratio generally leads to higher purity but lower yield, while a lower reflux ratio leads to higher yield but lower purity.

• The optimum reflux ratio can be determine...read more

The main parameter of roller press is the gap between the rollers.

• The main parameter of roller press is the gap between the rollers, which determines the size of the material particles after compression.

• The gap between the rollers can be adjusted to control the pressure and throughput of the roller press.

• Maintaining the optimal gap between the rollers is crucial for efficient operation and desired product quality.

I have over 10 years of experience in construction and structures, including managing large-scale projects and ensuring compliance with building codes.

• Managed construction projects from start to finish

• Ensured compliance with building codes and regulations

• Experience with structural design and analysis

• Worked on large-scale projects such as commercial buildings and bridges

Nominal mix is a rough mix with fixed ratios, while design mix is a specific mix designed for a particular strength and durability.

• Nominal mix has fixed ratios like 1:2:4, while design mix is calculated based on specific requirements.

• Design mix is more precise and tailored to achieve desired strength and durability.

• Nominal mix is commonly used for small construction projects, while design mix is preferred for larger projects.

• Example: Nominal mix - 1:2:4 for concrete, Design m...read more

The % composition of different alloying elements in Cast Iron varies depending on the type of cast iron.

• Common alloying elements in cast iron include carbon, silicon, manganese, sulfur, and phosphorus

• Grey cast iron typically contains 2-4% carbon, 1-3% silicon, and small amounts of manganese, sulfur, and phosphorus

• White cast iron has higher carbon content (2.5-4%) and lower silicon content compared to grey cast iron

• Ductile cast iron contains 3.2-4% carbon, 1-3% silicon, and sm...read more

The grade of concrete and ratio of cement are important factors in construction.

• The grade of concrete determines its strength and durability.

• The ratio of cement to other materials affects the workability and strength of the concrete.

• Common grades of concrete include M10, M20, M30, and M40.

• The ratio of cement to sand to aggregate can vary depending on the desired strength and workability of the concrete.

• A common ratio for M20 grade concrete is 1:1.5:3 (cement:sand:aggregate).

The NKP vial filling machine faces several problems in its operation.

• Leakage of vials during filling process

• Inaccurate filling volume

• Clogging of the machine due to particulate matter

• Mechanical breakdowns and malfunctions

• Inefficient cleaning and sterilization process

Elevation is the vertical distance between the road surface and a fixed point, while super elevation is the banking of the road on curves.

• Elevation is measured vertically from a fixed point, usually the sea level or a benchmark.

• Super elevation is the banking of the road on curves to counteract the centrifugal force.

• Elevation is important for drainage and slope stability, while super elevation is important for safety and comfort of drivers.

• Elevation is usually constant along a...read more