500+ Technician Interview Questions and Answers

Calibration of RTDs involves comparing the sensor's output to a known reference and adjusting it accordingly.

• RTDs (Resistance Temperature Detectors) are calibrated to ensure accurate temperature measurements.

• Calibration involves comparing the RTD's resistance values at different temperatures to a known reference.

• Adjustments are made to the RTD's output signal to align it with the reference values.

• Calibration can be done using a calibration bath, dry block calibrator, or a tem...read more

AC supply changes direction periodically while DC supply flows in one direction only.

• AC supply changes direction periodically while DC supply flows in one direction only

• AC supply is used for household appliances while DC supply is used for electronic devices

• AC supply can be transmitted over long distances while DC supply cannot

• AC supply can be easily converted to DC supply using a rectifier

• DC supply is more efficient than AC supply for certain applications

Series parallel connection in automobiles allows for efficient power distribution and redundancy.

• Series connection allows for higher voltage output, which is needed for certain components like headlights.

• Parallel connection ensures redundancy and reliability in case one component fails.

• Combining series and parallel connections optimizes power distribution in automobiles.

• Example: Series connection for battery cells, parallel connection for headlights.

Low pressure compressors operate at lower pressures and are typically used for household appliances, while high pressure compressors operate at higher pressures and are used for industrial applications.

• Low pressure compressors operate at pressures below 150 psi, while high pressure compressors operate at pressures above 1000 psi.

• Low pressure compressors are commonly used in refrigerators, air conditioners, and small pneumatic tools, while high pressure compressors are used in...read more

Machinery faults can be caused by various factors such as wear and tear, improper maintenance, human error, and environmental factors.

• Wear and tear of components can lead to machinery faults

• Improper maintenance can cause machinery to malfunction

• Human error such as incorrect operation or installation can lead to machinery faults

• Environmental factors such as temperature, humidity, and dust can affect machinery performance

• Faulty design or manufacturing can also cause machinery f...read more

There are two types of maintenance for induction motors: preventive and corrective.

• Preventive maintenance involves regular inspections, cleaning, lubrication, and replacement of worn parts to prevent breakdowns.

• Corrective maintenance involves repairing or replacing parts after a breakdown has occurred.

• Preventive maintenance is more cost-effective in the long run and helps to extend the life of the motor.

• Examples of preventive maintenance include checking for loose connections...read more

The type of brake used in an EOT crane is an electromagnetic brake.

• An electromagnetic brake uses an electrical current to create a magnetic field, which in turn creates friction and stops the crane's motion.

• This type of brake is commonly used in EOT cranes because it is reliable and requires minimal maintenance.

• Examples of EOT cranes that use electromagnetic brakes include those used in manufacturing plants, warehouses, and shipping yards.

To work TDC to BDC, rotate the crankshaft until the piston is at top dead center (TDC) and then rotate it in the direction of engine rotation until it reaches bottom dead center (BDC).

• Locate the timing marks on the crankshaft pulley and the timing cover

• Rotate the crankshaft until the timing mark on the pulley aligns with the TDC mark on the cover

• Rotate the crankshaft in the direction of engine rotation until the timing mark on the pulley aligns with the BDC mark on the cover

• U...read more

I am a technician with expertise in refrigeration cycles, AC blower issues, suction line icing, and grill temperature.

• Refrigeration cycle is a process in which refrigerant absorbs heat from the indoor air and releases it outside to cool the indoor space.

• AC blower running very slow could indicate a problem with the motor or a clogged air filter.

• AC suction line icing may be caused by low refrigerant levels, restricted airflow, or a faulty expansion valve.

• AC grill temperature sh...read more

Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.

• Transformers have two coils of wire, known as primary and secondary coils, which are magnetically coupled.

• When an alternating current flows through the primary coil, it creates a changing magnetic field which induces a voltage in the secondary coil.

• The ratio of the number of turns in the primary and secondary coils determines the voltage transformation ra...read more

Step-up transformers increase voltage while step-down transformers decrease voltage.

• Step-up transformers have more turns in the secondary coil than in the primary coil.

• Step-down transformers have more turns in the primary coil than in the secondary coil.

• Step-up transformers are used in power transmission to increase voltage and reduce current loss.

• Step-down transformers are used in electronic devices to decrease voltage to a safe level.

• Both types of transformers use electroma...read more

The cooling system in an engine circulates coolant through the engine to absorb heat and dissipate it through the radiator.

• Coolant is pumped through the engine block and cylinder head to absorb heat generated by combustion.

• The heated coolant then flows to the radiator where it releases heat to the surrounding air.

• The radiator fan helps to cool the coolant by blowing air through the radiator fins.

• The cooled coolant is then circulated back to the engine to repeat the process.

• Th...read more

The operating capacity of the engine is determined by factors such as horsepower, torque, and fuel efficiency.

• The operating capacity of an engine is typically measured in horsepower (HP) or kilowatts (kW).

• Torque is also an important factor in determining the engine's ability to perform under load.

• Fuel efficiency can impact the overall operating capacity of the engine, as a more efficient engine may be able to produce more power with less fuel consumption.

Tools required for opening a machine depend on the type of machine. However, some common tools include screwdrivers, pliers, wrenches, and hammers.

• The type of machine being opened will determine the specific tools needed

• Common tools include screwdrivers, pliers, wrenches, and hammers

• Other tools may include pry bars, wire cutters, and socket sets

• It is important to have the correct size and type of tool for the job to avoid damaging the machine or injuring oneself

There are several types of flow meters used in various industries to measure the flow rate of fluids or gases.

• Some common types of flow meters include electromagnetic flow meters, ultrasonic flow meters, turbine flow meters, and positive displacement flow meters.

• Electromagnetic flow meters use Faraday's law of electromagnetic induction to measure the flow rate of conductive fluids.

• Ultrasonic flow meters utilize ultrasonic waves to measure the velocity of the fluid and calcula...read more

An air cold chiller is a device that cools air by removing heat from it.

• An air cold chiller is commonly used in air conditioning systems to cool indoor spaces.

• It works by circulating a refrigerant that absorbs heat from the air and then releases it outside.

• The chilled air is then distributed through ducts or vents to cool the desired area.

• Air cold chillers can be used in various settings such as homes, offices, hospitals, and industrial facilities.

• Examples of air cold chiller...read more

Yes, I am familiar with current and transformers.

• I have a strong understanding of electrical current and its properties.

• I am knowledgeable about transformers and their role in electrical systems.

• I have experience working with current and transformers in practical applications.

• I can troubleshoot and repair issues related to current and transformers.

• I am familiar with the safety precautions associated with working with current and transformers.

I prioritize tasks based on deadlines and importance, use to-do lists, delegate when possible, and focus on one task at a time.

• Prioritize tasks based on deadlines and importance

• Use to-do lists to keep track of tasks

• Delegate tasks when possible to lighten the workload

• Focus on one task at a time to ensure quality and efficiency

Electrical engineering deals with power generation, transmission, and distribution, while electronics engineering focuses on electronic devices and circuits.

• Electrical engineering deals with power generation, transmission, and distribution

• Electronics engineering focuses on electronic devices and circuits

• Both fields are closely related and often overlap in areas such as control systems and telecommunications

• Understanding of electrical principles is essential for electronics en...read more

Compressor servicing and maintenance involves regular cleaning, lubrication, and inspection of parts.

• Clean air filters and condenser coils regularly

• Check oil levels and replace if necessary

• Inspect belts, hoses, and electrical connections for wear and tear

• Schedule professional maintenance at least once a year

• Keep compressor in a clean, dry, and well-ventilated area

• Follow manufacturer's instructions for specific maintenance tasks

• Examples: Changing air filters, checking refriger...read more

Oil paint can take anywhere from a few days to several weeks to fully dry, depending on factors like thickness and environmental conditions.

• Oil paint can take anywhere from a few days to several weeks to dry completely.

• Factors like the thickness of the paint layer and environmental conditions (humidity, temperature) can affect drying time.

• Thicker layers of oil paint will take longer to dry compared to thin layers.

• Painting in a well-ventilated area with moderate humidity and t...read more

A multimeter typically measures several parameters including voltage, current, and resistance.

• Voltage

• Current

• Resistance

• Continuity

• Diode testing

A wruster plate is a combination of a thruster and a rudder plate used in marine propulsion systems.

• A wruster plate combines the functions of a thruster (for lateral movement) and a rudder plate (for steering).

• It is commonly used in marine propulsion systems to improve maneuverability.

• The wruster plate allows for more precise control and easier handling of large vessels in tight spaces.

The clutch plate is a component in a manual transmission system that engages and disengages the engine from the transmission.

• The clutch plate is located between the engine and the transmission.

• It is responsible for transmitting power from the engine to the transmission.

• When the clutch pedal is pressed, the clutch plate disengages from the flywheel, allowing the engine to spin freely.

• When the clutch pedal is released, the clutch plate engages with the flywheel, transmitting po...read more

An aseptic area is a controlled environment where the risk of contamination is minimized to maintain sterility.

• Aseptic areas are commonly found in pharmaceutical manufacturing facilities and hospitals.

• These areas are designed to prevent the entry of microorganisms and maintain a sterile environment.

• Strict protocols and procedures are followed in aseptic areas to ensure cleanliness and sterility.

• Examples of aseptic areas include cleanrooms, operating theaters, and compounding ...read more

A multimeter is used to check voltage, current, and resistance.

• Multimeter is a versatile device used in electronics and electrical work

• It can measure voltage, current, resistance, continuity, and more

• Examples of multimeter brands include Fluke, Klein Tools, and Tektronix

A database management system is a software that allows users to create, access, and manage databases.

• DBMS is used to store and organize data in a structured manner

• It provides tools for data retrieval, modification, and deletion

• Examples include MySQL, Oracle, and Microsoft SQL Server

Principal working in ingot process involves melting raw materials, pouring into molds, solidifying, and removing ingots for further processing.

• Melting raw materials such as metal or alloy in a furnace

• Pouring the molten material into molds to shape it into ingots

• Allowing the material to solidify and cool in the molds

• Removing the solidified ingots from the molds for additional processing or use

The company has not provided food facilities due to budget constraints and lack of demand.

• Budget constraints prevent the company from providing food facilities

• There may not be enough demand for food facilities among employees

• The company may not have the resources to manage food facilities

• Employees may prefer to bring their own food or eat out

• The company may offer other benefits in lieu of food facilities

Transport facilities are not provided due to cost-cutting measures.

• Company is currently implementing cost-cutting measures.

• Providing transport facilities may not be financially feasible for the company.

• Employees can explore alternative transportation options such as carpooling or public transportation.

• The company may offer other benefits or incentives to compensate for the lack of transport facilities.

The raw material for wind blade manufacturing is primarily fiberglass and resin.

• Fiberglass is a composite material made of glass fibers and resin.

• The resin is typically a thermosetting polymer that hardens when cured.

• Other materials such as carbon fiber, balsa wood, and foam may also be used in the manufacturing process.

• The raw materials are layered and molded into the desired shape of the wind blade.

• The manufacturing process may also involve cutting, sanding, and finishing t...read more

Petrol engines use spark plugs to ignite fuel, while diesel engines use compression to ignite fuel.

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

• Petrol engines are generally lighter and more responsive, while diesel engines are more fuel efficient and have higher torque.

• Petrol engines are more common in cars and motorcycles, while diesel engines are often found in trucks and heavy machinery.

Answers to technical questions related to electricity and circuit protection.

• Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• A transformer is a device that transfers electrical energy from one circuit to another through electromagnetic induction.

• MCB (Miniature Circuit Breaker) is used to protect electrical circuits from overloads and short circuits, while RCCB (Residual Current Circuit Brea...read more

BPCR stands for Batch Production and Control Record. It is a document that provides a detailed record of the production and control activities for a specific batch of a product.

• BPCR is used in industries to ensure the quality and consistency of products.

• It includes information about the raw materials used, manufacturing processes, equipment used, and quality control tests performed.

• BPCR helps in tracking and tracing the production history of a batch.

• It is an essential documen...read more

A storage vasal in SIP refers to a mechanism for storing and retrieving data in a Session Initiation Protocol (SIP) environment.

• Storage vasal is used to store and retrieve data in SIP.

• It helps in managing and organizing data in a SIP environment.

• Examples of storage vasal in SIP include databases, file systems, and cloud storage.

• It allows for efficient data storage and retrieval during SIP sessions.

The unit of magnetic flux is the Weber (Wb).

• The unit of magnetic flux is a measure of the total magnetic field passing through a given area.

• It is represented by the symbol Wb.

• One Weber is equal to one Tesla multiplied by one square meter.

• The magnetic flux can be calculated by multiplying the magnetic field strength by the area it passes through.

The type of output of Solar cells is direct current (DC) electricity.

• Solar cells produce direct current (DC) electricity as their output.

• DC electricity is used to power electronic devices and can be stored in batteries for later use.

• Solar panels are made up of multiple solar cells connected in series or parallel to increase voltage or current output.

Diodes and transistors are electronic components used in circuits to control the flow of current.

• Diodes are two-terminal electronic components that allow current to flow in one direction only.

• Transistors are three-terminal electronic components that can amplify or switch electronic signals and are used in a wide range of electronic devices.

• There are two main types of transistors: bipolar junction transistors (BJTs) and field-effect transistors (FETs).

• BJTs are made of three la...read more

A megohmmeter is used for testing insulation.

• A megohmmeter, also known as an insulation tester, is used to measure the resistance of insulation materials.

• It applies a high voltage to the insulation and measures the current flowing through it.

• The results help determine if the insulation is in good condition or if there are any faults or leaks.

• Megohmmeters are commonly used in electrical and electronic industries to ensure the safety and reliability of insulation.

• Examples of in...read more

The working method in the footwear industry involves designing, manufacturing, marketing, and selling shoes and other footwear products.

• Designing and creating prototypes of new shoe styles

• Sourcing materials such as leather, rubber, and fabric

• Manufacturing shoes using machinery and skilled labor

• Quality control to ensure products meet standards

• Marketing and selling shoes through retail stores, online platforms, and other channels

AC motors use alternating current while DC motors use direct current.

• AC motors use a changing electrical current to produce rotational motion

• DC motors use a constant electrical current to produce rotational motion

• AC motors are typically used in household appliances and industrial machinery

• DC motors are commonly found in battery-operated devices like toys and tools

The firing order of a 4 cylinder engine is typically 1-3-4-2.

• The firing order refers to the sequence in which each cylinder in the engine fires.

• In a 4 cylinder engine, the firing order is usually 1-3-4-2.

• This means that cylinder 1 fires first, followed by cylinder 3, then cylinder 4, and finally cylinder 2.

Pressur vessels are containers designed to hold fluids or gases at a pressure significantly different from the ambient pressure.

• Pressur vessels are used in various industries such as oil and gas, chemical processing, and power generation.

• They are designed to withstand high pressure and are typically made of materials like steel or composite materials.

• Pressur vessels must be inspected regularly to ensure they are safe for use.

• Examples of pressur vessels include boilers, storag...read more

AC stands for alternating current and DC stands for direct current. They differ in the direction of flow of electrons.

• AC changes direction periodically while DC flows in one direction only

• AC is used for power transmission over long distances while DC is used for electronic devices

• AC voltage can be easily changed using a transformer while DC voltage cannot be changed easily

• Examples of AC devices include household appliances while examples of DC devices include batteries and el...read more

A diesel engine typically has four strokes: intake, compression, power, and exhaust.

• A diesel engine operates on the principle of internal combustion.

• During the intake stroke, air is drawn into the cylinder.

• During the compression stroke, the air is compressed.

• Fuel is injected into the cylinder during the power stroke.

• The exhaust stroke expels the combustion gases from the cylinder.

Petrol engines use spark ignition while diesel engines use compression ignition.

• Petrol engines have higher RPMs and are more suitable for high-speed driving.

• Diesel engines have higher torque and are more fuel-efficient.

• Petrol engines are lighter and quieter while diesel engines are heavier and noisier.

• Petrol engines emit more CO2 while diesel engines emit more NOx and particulate matter.

• Examples of petrol engines: Honda Civic, Toyota Corolla. Examples of diesel engines: Ford ...read more

The current consumed by a 60 watt ceiling fan depends on the voltage it is connected to.

• The current consumed by a 60 watt ceiling fan can be calculated using Ohm's law (I = P/V).

• Assuming a voltage of 120V, the current consumed by the fan would be 0.5A.

• However, if the voltage is different, the current consumed would also be different.

• It is important to check the fan's specifications or consult an electrician to determine the correct current rating.