50+ Oprating Engineer Interview Questions and Answers

Answers to questions related to operating engineer role

• Wafers are processed through a series of steps including cleaning, deposition, lithography, etching, and inspection

• Tool calibration involves adjusting and aligning the equipment to ensure accurate and precise measurements

• Golden standard is a reference recipe used to achieve desired results in plasma tool processing

• Troubleshooting PNR involves identifying potential issues, checking for errors, and adjusting parameters if n...read more

Siemens systems commonly use TIA Portal for PLC programming, WinCC for HMI, and Sinumerik for CNC.

• TIA Portal is used for programming PLCs in Siemens systems

• WinCC is the HMI software used in Siemens systems

• Sinumerik is the CNC software used in Siemens systems

Two stroke engines complete a power cycle in two strokes of the piston, while four stroke engines complete it in four strokes.

• Two stroke engines have a simpler design and are lighter than four stroke engines.

• Two stroke engines have a higher power-to-weight ratio than four stroke engines.

• Four stroke engines are more fuel efficient and have a longer lifespan than two stroke engines.

• Examples of two stroke engines include chainsaws, dirt bikes, and jet skis, while examples of fou...read more

Petrol engine and diesel engine are two types of internal combustion engines that differ in their fuel ignition process.

• Petrol engines use spark plugs to ignite the fuel-air mixture, while diesel engines use compression to ignite the fuel

• Petrol engines are generally more powerful and responsive, while diesel engines are more fuel-efficient and have more torque

• Examples of petrol engines include those found in cars, motorcycles, and small aircraft, while diesel engines are comm...read more

CVT stands for Continuously Variable Transmission. CB testing procedures involve measuring the performance of circuit breakers.

• CVT is a type of transmission that allows for seamless gear shifting

• To shutdown a line, the power source must be disconnected and all equipment turned off

• CB testing procedures involve measuring the insulation resistance, contact resistance, and timing of circuit breakers

• CB testing values vary depending on the specific breaker being tested

• Tan delta tes...read more

Types of mechanical industrial belts include V-belts, timing belts, flat belts, and ribbed belts.

• V-belts: commonly used for power transmission in industrial machinery

• Timing belts: used in engines to synchronize the rotation of the crankshaft and camshaft

• Flat belts: used for conveying materials in industrial applications

• Ribbed belts: have longitudinal ribs on the inner side for better grip and reduced slippage

Least count is the smallest measurement that can be made with an instrument.

• It is the smallest value that can be measured with an instrument.

• It is determined by the precision of the instrument.

• For example, the least count of a ruler with millimeter markings is 1 mm.

• It is important to consider the least count when taking measurements to ensure accuracy.

There are 2.54 centimetres in one inch.

• 1 inch is equal to 2.54 centimetres

• To convert inches to centimetres, multiply the number of inches by 2.54

• For example, 5 inches is equal to 5 x 2.54 = 12.7 centimetres

The least count of Main Scale is the smallest measurement that can be read directly from the scale.

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

• It is important for accurate measurements and precision in operating machinery.

• For example, if the main scale has divisions of 1 mm, the least count would be 1 mm.

Vibration is the back and forth movement of an object. It can be reduced by balancing, isolating, or damping.

• Balancing rotating equipment to reduce vibration

• Isolating vibrating equipment from surrounding structures

• Using damping materials to absorb vibration energy

Welding is a process of joining two materials together by melting them and allowing them to cool, creating a strong bond.

• There are several types of welding processes including MIG (Metal Inert Gas), TIG (Tungsten Inert Gas), Stick, and Flux-Cored Arc Welding.

• Each type of welding process has its own advantages and is used for different applications.

• Welding can be done using different heat sources such as gas flames, electric arcs, lasers, or ultrasound.

• Common materials welded ...read more

A shock absorber is a mechanical or hydraulic device designed to absorb and dampen shock impulses.

• Shock absorbers are commonly used in vehicles to reduce the effects of bumps and vibrations on the suspension system.

• They work by converting kinetic energy into heat, which is then dissipated.

• Examples of shock absorber brands include Bilstein, Monroe, and KYB.

My final project in college involved designing and implementing a new system for optimizing operations in a manufacturing plant.

• Researched current operations and identified areas for improvement

• Designed a new system using software and automation technology

• Implemented the system in a pilot program at the manufacturing plant

• Monitored and evaluated the system's performance to measure its impact on operations

• Presented findings and recommendations to faculty and industry professio...read more

ACC and water condenser are both used in cooling systems, but ACC uses air as the cooling medium while water condenser uses water.

• ACC (Air Cooled Condenser) uses air as the cooling medium to condense the refrigerant vapor into liquid form.

• Water condenser uses water as the cooling medium to remove heat from the refrigerant.

• ACC is commonly used in air conditioning systems for buildings and vehicles.

• Water condensers are often used in industrial processes and power plants.

• ACC is ...read more

Servo motors and induction motors operate differently in terms of control and speed regulation.

• Servo motors are controlled by a feedback mechanism to achieve precise position control, while induction motors rely on the frequency of the power supply for speed control.

• Servo motors have higher accuracy and faster response times compared to induction motors.

• Induction motors are more commonly used in high-power applications like industrial machinery, while servo motors are used in...read more

Motors, generators, and transformers are electrical devices used for power conversion and transmission.

• Motors convert electrical energy into mechanical energy to produce motion.

• Generators convert mechanical energy into electrical energy.

• Transformers are used to transfer electrical energy from one circuit to another through electromagnetic induction.

• Transformers can step up or step down voltage levels.

• Examples of motors include electric fans, washing machines, and electric car...read more

HR stands for Human Resource, which refers to the management of an organization's workforce.

• HR involves recruiting, hiring, training, and managing employees.

• It also includes developing and implementing policies and procedures related to employee benefits, compensation, and performance evaluation.

• HR plays a crucial role in ensuring that an organization's employees are productive, satisfied, and motivated.

• Examples of HR functions include conducting job interviews, administering...read more

Yes, I can lift up to 5kg.

• Yes, I am able to lift up to 5kg without any issues.

• I have experience lifting weights up to 5kg in previous roles.

• I am physically fit and capable of lifting objects weighing up to 5kg.

CEP discharge pressure negative refers to a situation where the pressure in the discharge line of a centrifugal pump is lower than atmospheric pressure.

• CEP discharge pressure negative can occur due to a blockage in the discharge line, a malfunctioning pump, or improper system design.

• This can lead to cavitation, reduced pump efficiency, and potential damage to the pump.

• Monitoring and maintaining proper discharge pressure is essential for the efficient operation of a centrifuga...read more

Types of engines include diesel, gasoline, electric, and hybrid. A two-stroke engine completes a power cycle in two strokes of the piston.

• Types of engines: diesel, gasoline, electric, hybrid

• Two-stroke engine completes power cycle in two piston strokes

• Two-stroke engines are commonly used in small motorcycles, chainsaws, and outboard motors

Checking the radiator is an important task for an operating engineer.

• Check the radiator for any leaks or damage.

• Ensure that the radiator is properly filled with coolant.

• Inspect the radiator fins for any debris or blockages.

• Verify that the radiator fan is functioning correctly.

• Monitor the temperature gauge to ensure the radiator is cooling effectively.

The technical department is responsible for overseeing and managing the technical aspects of a company or organization.

• Responsible for maintenance and repair of equipment and machinery

• Developing and implementing technical procedures and protocols

• Providing technical support to other departments

• Ensuring compliance with safety regulations and standards

Abnormality condition refers to any deviation from the normal operating state or condition.

• Abnormality conditions can include equipment malfunctions, safety hazards, or unexpected events.

• Examples of abnormality conditions in operating engineering may include power outages, equipment breakdowns, or safety violations.

• It is important for operating engineers to quickly identify and address abnormality conditions to ensure the safety and efficiency of operations.

Bending machines can be classified as manual, semi-automatic, or CNC based on their operation.

• Manual bending machines are operated by hand and require physical effort from the operator.

• Semi-automatic bending machines have some automated features but still require manual input for operation.

• CNC bending machines are fully automated and controlled by computer programs for precise bending.

• Examples: Manual - hand brake, Semi-automatic - hydraulic press brake, CNC - CNC press brake

A machine is a device that uses energy to perform a specific task or function.

• Machines are designed to make work easier by transforming energy into mechanical force.

• They can be simple, like a lever or pulley, or complex, like a computer or car engine.

• Examples of machines include a sewing machine, a microwave oven, and a crane.

• Machines can be categorized into various types, such as mechanical, electrical, or electronic.

• They are used in various industries, including manufacturi...read more

An engine is a machine that converts energy into mechanical force or motion.

• Engines are commonly used in vehicles, such as cars, motorcycles, and airplanes.

• They can be powered by various sources, including gasoline, diesel, electricity, or steam.

• Engines work by burning fuel or using other energy sources to create a controlled explosion, which generates force.

• They consist of various components, such as cylinders, pistons, valves, and a crankshaft.

• Examples of engines include in...read more

The first role of shop floor 5S is to organize and standardize the work environment for improved efficiency and safety.

• Implementing a system for sorting, setting in order, shining, standardizing, and sustaining

• Creating designated areas for tools and equipment

• Regularly cleaning and maintaining workstations

• Training employees on 5S principles and practices

My strong field is operating heavy machinery and equipment, with a focus on safety and efficiency.

• Extensive experience operating various types of heavy machinery

• Strong understanding of safety protocols and procedures

• Ability to troubleshoot and make minor repairs on equipment

• Skilled in maximizing efficiency and productivity on the job

• Certifications in operating specific types of machinery (e.g. cranes, bulldozers, excavators)

There are several types of shafts including straight, stepped, tapered, splined, and flexible.

• Straight shafts are the most common type and have a uniform diameter throughout their length.

• Stepped shafts have varying diameters at different sections.

• Tapered shafts have a gradually decreasing diameter from one end to the other.

• Splined shafts have ridges or teeth along their length to connect with other components.

• Flexible shafts are used in applications where a rigid shaft cannot...read more

CNC (Computer Numerical Control) works by using computer software to control the movement of tools and machinery for precision manufacturing.

• CNC machines are programmed using G-code, a language that tells the machine how to move and operate.

• The G-code is generated using CAD/CAM software, which allows for precise design and simulation before production.

• CNC machines can perform a wide range of operations, such as cutting, drilling, milling, and turning, with high accuracy and r...read more

The main thing in CNC is computer numerical control, which allows for precise and automated control of machining tools.

• Computer numerical control (CNC) is the main thing in CNC machining

• CNC allows for precise and automated control of machining tools

• CNC programming involves writing code to control the movements and actions of the machine

• CNC machines are used in various industries such as manufacturing, aerospace, and automotive

• CNC technology has revolutionized the manufacturin...read more

Power and steel are essential components of infrastructure and construction industries, providing the foundation for buildings, bridges, and other structures.

• Power refers to the energy needed to operate machinery and equipment in various industries.

• Steel is a strong and durable alloy made primarily of iron and carbon, used in construction, manufacturing, and infrastructure projects.

• Both power and steel play crucial roles in the development and growth of economies worldwide.

• Ex...read more

Types of gear include spur gear, helical gear, bevel gear, worm gear, etc.

• Spur gear: straight teeth parallel to the gear axis

• Helical gear: teeth are at an angle to the gear axis

• Bevel gear: teeth are conically shaped

• Worm gear: consists of a screw meshing with a toothed wheel

Different types of parts of cars

• Engine components (e.g. spark plugs, pistons, valves)

• Transmission parts (e.g. gears, clutch, drive shaft)

• Suspension parts (e.g. shocks, struts, control arms)

• Brake components (e.g. brake pads, rotors, calipers)

• Electrical parts (e.g. battery, alternator, starter)

• Exterior parts (e.g. headlights, taillights, mirrors)

• Interior parts (e.g. seats, dashboard, steering wheel)

A drill machine works by rotating a drill bit to create holes in various materials.

• Drill machines use a motor to rotate the drill bit at high speeds.

• The drill bit is pressed against the material being drilled, creating a hole.

• Different types of drill bits are used for different materials, such as wood, metal, or concrete.

Mechanical engineering is a branch of engineering that focuses on designing, analyzing, and manufacturing mechanical systems.

• Involves designing and analyzing mechanical systems such as engines, machines, and tools

• Includes studying materials, thermodynamics, fluid mechanics, and dynamics

• Mechanical engineers work in various industries like automotive, aerospace, and manufacturing

• Examples include designing a new car engine, optimizing a manufacturing process, or creating a robot...read more

Production engineering involves designing, implementing, and optimizing production processes to maximize efficiency and quality.

• Involves designing and implementing production processes

• Focuses on optimizing processes for efficiency and quality

• Utilizes tools like Lean manufacturing and Six Sigma

• Works closely with other engineering disciplines and production teams

• Examples include designing assembly lines, improving manufacturing processes, and implementing automation

I am a skilled operating engineer with experience in heavy equipment operation and maintenance.

• I have operated and maintained various types of heavy equipment such as bulldozers, excavators, and cranes.

• I am knowledgeable in safety procedures and regulations related to heavy equipment operation.

• I have experience working in construction sites and industrial facilities.

• I am a quick learner and able to adapt to new equipment and technologies.

• I am a team player and able to communi...read more

Engineering plastics offer superior strength, durability, and resistance to wear and tear.

• High strength-to-weight ratio

• Excellent chemical resistance

• Low friction coefficient

• Good electrical insulation properties

• Can withstand high temperatures

• Examples: Nylon, Acetal, Polycarbonate, PEEK

Electronics is the branch of physics and technology that deals with the flow of electrons and their behavior in devices.

• Electronics involves the study of electronic components such as diodes, transistors, and integrated circuits.

• It focuses on the design and development of electronic circuits for various applications.

• Examples of electronic devices include smartphones, computers, televisions, and radios.

Theory of machine strength of materials involves the study of how materials behave under different loads and stresses.

• It deals with the analysis of stresses and strains in machine components

• It helps in designing and selecting materials for machine parts

• It involves the study of fatigue, fracture mechanics, and creep

• Examples include calculating the stress in a beam, designing a shaft for a motor, and selecting the appropriate material for a gear

• It is important for ensuring the ...read more

Water is a liquid state of H2O, while steam is the gaseous state of water when heated to its boiling point.

• Water is in liquid state at room temperature, while steam is in gaseous state.

• Water has a lower temperature compared to steam.

• Steam is formed when water is heated to its boiling point (100°C at sea level).

• Water is commonly used for drinking and cleaning, while steam is used in power generation and heating systems.

The minimum value of a micrometer is 0.01mm.

• Micrometers are used to measure small distances with high precision.

• The minimum value of a micrometer is also known as its resolution.

• Examples of objects that can be measured with a micrometer include wires, screws, and bolts.

The first role of line set up is to establish the foundation for the entire operation.

• Ensure all equipment and materials are in place

• Follow safety protocols and guidelines

• Coordinate with team members for efficient workflow

Mold types include allergenic, pathogenic, toxigenic, and saprophytic. A plate is a flat, thin, and usually circular dish.

• Allergenic mold causes allergic reactions

• Pathogenic mold causes infections

• Toxigenic mold produces mycotoxins

• Saprophytic mold feeds on dead organic matter

• A plate is used in microbiology to culture and grow microorganisms

• Petri dishes are a common type of plate used in microbiology

A power plant is a facility that generates electricity by converting various forms of energy into electrical power.

• Power plants can use various sources of energy such as coal, natural gas, nuclear, hydroelectric, wind, and solar.

• The energy is converted into electrical power through turbines, generators, and other equipment.

• Power plants play a crucial role in providing electricity to homes, businesses, and industries.

• Examples of power plants include coal-fired plants, nuclear ...read more

A damper is a device that reduces or controls the flow of air, gas, or liquid.

• Used in HVAC systems to regulate airflow

• Can be manually or automatically controlled

• Examples include fire dampers, smoke dampers, and volume dampers