100+ Operator Interview Questions and Answers

The interview question covers topics related to measuring instruments such as micrometres, vernier calipers, gauges, and dial indicators.

• Least count of micrometres is the smallest measurement that can be read by the instrument.

• Vernier calipers are used to measure the internal and external dimensions of objects.

• Gauges are tools used to measure the thickness, diameter, or distance between two surfaces.

• Types of gauges include plug gauges, ring gauges, and snap gauges.

• To measure ...read more

Questions related to reactor types, distillation, heat transfer, fire safety, work permits, and plant processes.

• Types of reactors include batch, continuous stirred tank, and plug flow.

• Types of distillation include simple, fractional, and vacuum distillation.

• Vacuum distillation is used to separate compounds with high boiling points.

• Vacuum pumps are used to create a vacuum in a system.

• Exothermic reactions release heat, while endothermic reactions absorb heat.

• Heat transfer can o...read more

I follow a systematic approach to troubleshoot and solve the problem in the machine.

• I first identify the problem and its root cause

• Then I refer to the machine manual or seek help from colleagues

• I try to fix the problem myself if possible

• If not, I escalate the issue to the concerned department

• I ensure that the machine is not operated until the problem is resolved

ETP plant is set up to treat industrial wastewater before releasing it into the environment. UASBR is a type of ETP.

• ETP plant is necessary to prevent pollution of water bodies

• UASBR stands for Upflow Anaerobic Sludge Blanket Reactor

• UASBR is a type of ETP that uses anaerobic bacteria to break down organic matter in wastewater

• Other types of ETP include activated sludge process, sequencing batch reactor, and membrane bioreactor

The least count of measurement instruments like dial gauge, caliper, and micrometer and how to use them.

• Dial gauge typically has a least count of 0.01 mm and is used to measure small distances or thicknesses.

• Calipers usually have a least count of 0.02 mm and are used for measuring lengths and diameters.

• Micrometers have a least count of 0.01 mm and are used for precise measurements of small dimensions.

The question covers various topics related to tar production process, pumps, valves, ammonia boiling point, CO gas percentage, pH, and NRV.

• Tar density is the measure of the mass per unit volume of tar.

• The tar production process involves heating organic materials in the absence of air.

• Types of pumps used in the tar production process include centrifugal pumps, positive displacement pumps, and gear pumps.

• Types of valves used in the tar production process include gate valves, gl...read more

Phase sequence, phase voltage, line voltage, earthing, and power factor are all important electrical concepts.

• Phase sequence refers to the order in which the three phases of an AC power supply reach their maximum values.

• Phase voltage is the voltage measured across a single phase of an AC power supply.

• Line voltage is the voltage measured between any two phases of an AC power supply.

• Earthing is the process of connecting a conductor to the earth to prevent electric shock and pro...read more

As an operator in beverage filling machine, one must know the type of filler, the filling process, and how to handle breakdowns.

• Operators must be knowledgeable about the type of filler used in the machine.

• They should also be familiar with the filling process to ensure that the product is filled accurately and efficiently.

• In case of breakdowns, operators must know how to troubleshoot and fix the issue to minimize downtime.

• The job role of an operator in beverage filling machine...read more

We fill various types of capsules based on the requirements of our clients.

• We fill both gelatin and vegetarian capsules.

• Capsules can be filled with powders, pellets, or liquids.

• We can fill capsules with different sizes and colors.

• We also offer customized printing on capsules.

• The types of capsules we fill depend on the needs of our clients.

Clinging of p type and c type is done by using appropriate cleaning solutions and techniques.

• For p type, RCA clean is used which involves cleaning with a mixture of hydrogen peroxide, ammonium hydroxide, and deionized water.

• For c type, piranha solution is used which involves cleaning with a mixture of sulfuric acid and hydrogen peroxide.

• Both types require proper handling and safety precautions due to the hazardous nature of the cleaning solutions.

• Cleaning should be followed b...read more

Titanium dioxide is commonly used as an opacifier in film coating.

• Titanium dioxide is a white pigment that provides opacity and whiteness to film coatings.

• It is widely used in industries such as pharmaceuticals, cosmetics, and food.

• Other opacifiers used in film coating include zinc oxide and calcium carbonate.

Experience is more necessary than an engineering degree.

• Experience helps in practical problem-solving and decision-making.

• Engineering degree provides theoretical knowledge and technical skills.

• Experience can compensate for lack of formal education.

• Employers often value experience over education.

• Combination of both education and experience is ideal.

The question covers various topics related to pumps, valves, and chemical properties.

• pH is a measure of acidity or alkalinity of a solution.

• Tar density is the mass of tar per unit volume of a substance.

• Tar production process involves heating organic materials in the absence of air.

• Types of pumps include centrifugal, positive displacement, and axial flow pumps.

• Types of valves include ball, gate, globe, and check valves.

• NRV stands for Non-Return Valve, which allows fluid to flo...read more

The carburetor is installed in gasoline-powered cars.

• Carburetors are not found in diesel-powered cars.

• Carburetors mix air and fuel for the engine to use.

• Modern cars typically use fuel injection instead of carburetors.

• Carburetors were commonly used in cars before the 1980s.

• Examples of cars with carburetors include the Ford Mustang and Chevrolet Camaro.

Effective man management requires clear communication, delegation, motivation, and conflict resolution.

• Clear communication: Ensuring that expectations, goals, and feedback are communicated clearly to the team members.

• Delegation: Assigning tasks and responsibilities to the right individuals based on their skills and strengths.

• Motivation: Inspiring and motivating the team members to achieve their best performance.

• Conflict resolution: Addressing conflicts and disagreements among...read more

The least count of micrometres in a vernier caliper is typically 0.01 mm or 0.001 cm.

• The least count is the smallest measurement that can be read on the instrument.

• In a vernier caliper, the main scale typically has graduations of 1 mm or 0.1 cm.

• The vernier scale has 10 divisions that cover 9 main scale divisions, resulting in a least count of 0.01 mm or 0.001 cm.

Fundamental deviation of hole in BIS system can be indicated by specifying the tolerance zone and the position of the hole.

• Specify the tolerance zone for the hole based on the BIS system standards.

• Measure the actual position of the hole and compare it to the specified tolerance zone.

• If the actual position of the hole falls outside the tolerance zone, indicate it as a fundamental deviation.

The principle of a coating machine is to apply a thin layer of material onto a surface.

• Coating machines use various methods such as spraying, dipping, or rolling to apply the coating material.

• The coating material can be a liquid, powder, or a combination of both.

• The machine ensures uniform and controlled application of the coating material.

• Coating machines are used in various industries like automotive, electronics, and packaging.

• Examples of coating machines include spray coa...read more

The number of documents controlling component making varies depending on the complexity of the process.

• The number of documents can range from a few to dozens depending on the complexity of the component and the regulations that need to be followed.

• Examples of documents that may be involved include work instructions, standard operating procedures, quality control checklists, and safety protocols.

• The documents are designed to ensure consistency and quality in the manufacturing ...read more

A rack and pinion mechanism is used to convert linear motion of plunger to rotary motion of pointer in D.T.I.

• Rack and pinion mechanism consists of a gear (pinion) that meshes with a linear gear (rack) to convert linear motion into rotary motion.

• As the plunger moves linearly, it engages with the rack which in turn rotates the pinion, causing the pointer to move.

• This mechanism is commonly used in devices like dial indicators to accurately measure small distances.

• The rack and pi...read more

The trolley travels a distance of 18.50 meters at a speed of 70 meters per minute.

• The trolley covers a distance of 18.50 meters.

• It travels at a speed of 70 meters per minute.

• The trolley can be measured in terms of distance covered and speed.

The fundamental control process in our machine is a feedback loop.

• Our machine uses sensors to gather data on its performance and compares it to a desired outcome.

• Based on this comparison, the machine adjusts its actions to achieve the desired outcome.

• This process is repeated continuously to maintain optimal performance.

• Examples include thermostat regulating temperature, cruise control in a car, and autopilot in a plane.

To see old bills in Tally without clicking F2, use the Display menu and select the required bill.

• Go to the Display menu in Tally

• Select the type of bill you want to view (e.g., Sales, Purchase, Payment)

• Choose the specific bill from the list displayed

Pio generates BPR based on code number and batch number.

• Pio uses a unique code number and batch number to generate BPR.

• The BPR is generated automatically by Pio's software.

• The BPR includes information such as product details, manufacturing date, and batch number.

• Pio's BPR generation process ensures accuracy and compliance with industry standards.

Diesel and petrol vehicles differ in fuel type, engine design, fuel efficiency, and emissions.

• Diesel engines use compression ignition while petrol engines use spark ignition

• Diesel engines are more fuel-efficient than petrol engines

• Petrol engines emit more CO2 than diesel engines

• Diesel engines produce more nitrogen oxides (NOx) and particulate matter (PM) than petrol engines

• Examples: Diesel - Ford F-250, Petrol - Honda Civic

A forklift operator is responsible for handling raw materials.

• Operates forklift to transport raw materials

• Loads and unloads materials from trucks or storage areas

• Ensures materials are properly stacked and secured

• Performs routine maintenance on forklift

• Follows safety protocols and regulations

Tempering and quenching are heat treatment processes used to alter the properties of metals.

• Tempering involves heating the metal to a specific temperature and then cooling it in order to reduce brittleness and increase toughness.

• Quenching is the rapid cooling of a metal in water, oil, or air to increase hardness and strength.

• Both processes are commonly used in the manufacturing of tools, knives, and other metal components.

ESD should be used in shop floor to control the body for electronic devices.

• ESD (Electrostatic Discharge) helps prevent damage to electronic devices caused by static electricity.

• It ensures the safety of both the operator and the electronic equipment.

• ESD control measures include using ESD mats, wrist straps, and grounding techniques.

• By implementing ESD practices, the risk of costly damage to sensitive electronic components is minimized.

• ESD protection is crucial in industries l...read more

The electricity market refers to the buying and selling of electricity and related products.

• Electricity is traded on various markets such as spot markets, futures markets, and forward markets.

• The price of electricity is influenced by factors such as supply and demand, weather conditions, and government regulations.

• Renewable energy sources such as solar and wind power are becoming increasingly important in the electricity market.

• Electricity markets can be regional, national, o...read more

To Mack bobbin, wind thread around a spool in a specific way. To Mack carpet, install or lay down carpeting in a space.

• To Mack bobbin, start by placing an empty bobbin on the bobbin winder of a sewing machine. Then, thread the sewing machine and wind the thread around the bobbin in a clockwise direction.

• To Mack carpet, first measure the area where the carpet will be installed. Then, prepare the subfloor by cleaning and leveling it. Next, lay down carpet padding and stretch th...read more

There are several types of transformers including power, distribution, isolation, autotransformer, and instrument transformer.

• Power transformers are used in transmission and distribution systems.

• Distribution transformers are used to step down voltage for use in homes and businesses.

• Isolation transformers are used to isolate circuits from each other.

• Autotransformers are used to step up or step down voltage.

• Instrument transformers are used to measure voltage and current in high...read more

To progress, oppo company needs to focus on innovation, customer satisfaction, and market expansion.

• Invest in research and development to bring innovative features and technologies to their products.

• Improve customer satisfaction by providing excellent after-sales service and addressing customer feedback.

• Expand into new markets and increase brand presence through effective marketing and distribution strategies.

Gauge is a measuring tool used to determine the size or amount of something. Types include pressure, thickness, and radius gauges.

• Gauges are used in various industries such as automotive, aviation, and manufacturing.

• Pressure gauges measure the pressure of liquids or gases, while thickness gauges measure the thickness of materials.

• Radius gauges are used to measure the radius of curved surfaces.

• Other types of gauges include thread gauges, bore gauges, and feeler gauges.

• Gauges c...read more

Mass production allows for lower costs due to economies of scale.

• Lower production costs per unit

• Increased efficiency in production processes

• Ability to meet high demand quickly

• Consistent quality control measures

• Examples: assembly line production in automotive industry, electronics manufacturing

To improve work conditions, techniques like ergonomics, proper lighting, ventilation, and noise control can be used.

• Ensure proper ergonomics to prevent musculoskeletal disorders

• Provide adequate lighting to reduce eye strain and headaches

• Maintain proper ventilation to prevent respiratory problems

• Control noise levels to prevent hearing damage

• Implement safety measures to prevent accidents

Solvent extraction involves using a solvent to separate compounds, while distillation involves separating compounds based on their boiling points.

• Solvent extraction uses a solvent to dissolve the desired compound, which is then separated from the solvent. Distillation involves heating a mixture to separate compounds based on their boiling points.

• Solvent extraction is often used in the extraction of essential oils from plants, while distillation is commonly used in the purific...read more

CNG compressors typically have multiple stages to increase the pressure of the gas.

• CNG compressors usually have 2 to 4 stages depending on the desired pressure output.

• Each stage of the compressor helps to incrementally increase the pressure of the gas before it is stored or used.

• Higher pressure requirements may necessitate more stages in the compressor system.

• Examples of CNG compressor manufacturers with multi-stage systems include Ariel Corporation and Ingersoll Rand.

NC stands for Numerical Control and CNC stands for Computer Numerical Control. They are machines used in manufacturing processes.

• NC machines are controlled by punched cards or tapes, while CNC machines are controlled by computers.

• NC machines require manual programming, while CNC machines use computer-aided design (CAD) and computer-aided manufacturing (CAM) software.

• NC machines are less flexible and versatile compared to CNC machines.

• CNC machines offer higher precision, accur...read more

I have 5 years of experience working with Aluminum.

• I have worked extensively with Aluminum in various projects.

• I am familiar with the properties and characteristics of Aluminum.

• I have experience in handling and shaping Aluminum for different applications.

• I have successfully completed projects involving Aluminum fabrication and welding.

• I have knowledge of different Aluminum alloys and their uses.

A turbine is a device that converts the energy from a fluid flow into useful work, typically by rotating a shaft.

• Turbines are commonly used in power generation, aviation, and marine propulsion.

• They work on the principle of Newton's third law of motion, where the reaction force of the fluid flow causes the turbine blades to rotate.

• Turbines can be classified into various types such as steam turbines, gas turbines, and hydraulic turbines.

• Steam turbines are used in power plants t...read more

Critical process variables are key factors that directly impact the outcome of a process.

• Critical process variables are essential for maintaining quality and efficiency.

• They are measurable and controllable factors that affect the process.

• Examples include temperature, pressure, flow rate, pH level, and reaction time.

• Monitoring and controlling these variables is crucial to ensure desired outcomes.

• Changes in critical process variables can lead to variations in the final product.

Shipping involves the transportation of goods from one place to another via various modes of transportation.

• Shipping can involve transportation by sea, air, road, or rail.

• It includes the process of packaging, labeling, loading, and unloading goods.

• Shipping companies often use containers to transport goods efficiently.

• Tracking systems are used to monitor the movement of shipments and provide real-time updates to customers.

I am not sure what the question is asking. Can you please rephrase it?

• Please provide more context or clarify the question

• I am unable to understand the question as it is currently written

• Can you please provide an example or scenario?

• I am happy to answer any question to the best of my ability

The process of whose pipe refers to the process of determining ownership or responsibility for a particular pipeline.

• Identifying the owner of the pipe

• Determining the party responsible for maintenance and repairs

• Establishing liability in case of accidents or damages

I have worked with various machines including CNC machines, printing presses, and packaging machines.

• CNC machines

• Printing presses

• Packaging machines

The powertrain is the system in a vehicle that generates power and delivers it to the wheels.

• The powertrain typically includes the engine, transmission, driveshaft, and differential.

• It is responsible for converting fuel into mechanical energy to propel the vehicle.

• Different types of powertrains include gasoline, diesel, electric, and hybrid.

• Regular maintenance of the powertrain components is essential for optimal performance.

Rectifier unit is responsible for converting alternating current (AC) to direct current (DC) in electrical systems.

• Converts AC to DC for various electrical systems

• Helps in maintaining a steady flow of current

• Used in power supplies, battery chargers, and electronic devices