400+ Technician Interview Questions and Answers

The list count of a vernier caliper typically includes the main scale and the vernier scale.

• The list count of a vernier caliper is usually 2, consisting of the main scale and the vernier scale.

• The main scale is typically graduated in millimeters or inches, while the vernier scale allows for more precise measurements.

• The vernier scale has divisions that are slightly smaller than those on the main scale, enabling measurements to be taken to a fraction of the smallest division o...read more

To fix working time problem, identify the root cause and implement appropriate solutions.

• Identify the cause of the problem, such as inefficient scheduling or lack of resources

• Implement appropriate solutions, such as adjusting schedules or hiring additional staff

• Monitor the effectiveness of the solutions and make adjustments as necessary

Time complexity refers to the amount of time an algorithm takes to run, while space complexity refers to the amount of memory it requires.

• Time complexity measures the efficiency of an algorithm in terms of the time it takes to execute as the input size increases.

• Space complexity measures the efficiency of an algorithm in terms of the amount of memory it requires as the input size increases.

• Time complexity is commonly expressed using Big O notation, such as O(n) or O(n^2), whe...read more

Mechanical work involves the use of machines and tools to create, repair, or maintain mechanical systems.

• Mechanical work involves designing, building, and repairing machines and mechanical systems.

• Tools commonly used in mechanical work include wrenches, pliers, screwdrivers, and hammers.

• Machines used in mechanical work include lathes, milling machines, and drill presses.

• Mechanical work is used in a variety of industries, including manufacturing, construction, and transportati...read more

An AHU (Air Handling Unit) is a device used to regulate and circulate air as part of a heating, ventilation, and air conditioning (HVAC) system.

• AHU is an abbreviation for Air Handling Unit.

• It is a device used in HVAC systems to control and distribute air.

• AHUs typically consist of a fan, heating and cooling coils, filters, and dampers.

• They are responsible for conditioning and circulating air within a building.

• AHUs can be found in various settings such as commercial buildings, ...read more

A UPS (Uninterruptible Power Supply) is a device that provides emergency power to a load when the input power source fails.

• UPS is used to protect critical equipment from power outages, voltage fluctuations, and other power-related issues.

• It typically consists of a battery, an inverter, and a rectifier.

• UPS can be used for various applications such as computers, data centers, hospitals, telecommunications, etc.

• Examples of UPS brands include APC, CyberPower, Eaton, and Tripp Lit...read more

A transistor is a semiconductor device used to amplify or switch electronic signals.

• Transistors consist of three layers of semiconductor material: the emitter, base, and collector.

• The working principle of a transistor involves controlling the flow of current between the emitter and collector using the base.

• Transistors can be used in various electronic devices such as amplifiers, switches, and oscillators.

• Common types of transistors include bipolar junction transistors (BJTs) ...read more

Compressor part failure can be handled by identifying the root cause, replacing the faulty part, and conducting regular maintenance.

• Identify the root cause of the failure

• Replace the faulty part with a new one

• Conduct regular maintenance to prevent future failures

• Ensure proper lubrication and cooling of the compressor

• Monitor the compressor's performance and address any issues promptly

Vernier Kelly Park is a public park located in the city. It offers various recreational activities and amenities for visitors.

• Vernier Kelly Park is a public park

• Located in the city

• Offers recreational activities and amenities

• Open to visitors

Structural construction methodology involves building load-bearing structures, while non-structural construction focuses on interior finishes and aesthetics.

• Structural construction involves the use of materials like concrete, steel, and wood to create the framework of a building.

• Non-structural construction includes tasks like installing drywall, painting, and laying flooring.

• Structural construction requires careful planning and engineering to ensure the building's stability a...read more

The system operates by performing a series of tasks to achieve a specific goal.

• The system receives input from the user or external sources.

• It processes the input using algorithms and logic.

• The processed data is then stored or displayed as output.

• The system may also have feedback mechanisms to improve performance.

• Examples include a computer system, a manufacturing assembly line, or a traffic control system.

The number of times used making a one ingot depends on the size of the ingot and the manufacturing process.

• The number of times a one ingot is used can vary depending on the size of the ingot and the specific manufacturing process.

• In some cases, a single ingot may be used multiple times to create different products.

• For example, in metal casting, an ingot may be melted down and poured into molds multiple times to create various components.

The material used in the ingot process is typically metal, such as aluminum, steel, or copper.

• Metal is the primary material used in the ingot process

• Common metals used include aluminum, steel, and copper

• The ingot process involves melting the metal and pouring it into molds to cool and solidify

Safety valves are devices used to prevent overpressure in equipment by releasing excess pressure to the atmosphere.

• They are commonly used in boilers, pressure vessels, and pipelines.

• They are designed to open at a predetermined pressure to prevent equipment damage or failure.

• They can be spring-loaded, pilot-operated, or safety-relief valves.

• They are required by law in many industries to ensure safe operation of equipment.

• Examples include the pressure relief valve on a hot wate...read more

The mm wire required for ten 60 Watt fans depends on the distance between the power source and the fans.

• The distance between the power source and the fans affects the voltage drop and current carrying capacity of the wire.

• The wire gauge required can be calculated using an online wire gauge calculator or consulting an electrician.

• For example, if the distance is less than 50 feet, a 14-gauge wire may be sufficient.

• However, if the distance is more than 100 feet, a 10-gauge wire ...read more

Four stroke diesel and petrol engines operate on the principle of internal combustion, but with different fuel types.

• Both diesel and petrol engines are internal combustion engines that convert chemical energy into mechanical energy.

• In a four stroke diesel engine, the four strokes are intake, compression, power, and exhaust. Diesel fuel is ignited by compression alone.

• In a four stroke petrol engine, the four strokes are intake, compression, power, and exhaust. Petrol fuel is i...read more

Efflorescence in concrete is the white powdery substance that forms on the surface due to the migration of soluble salts.

• Efflorescence is caused by water moving through the concrete, dissolving salts and carrying them to the surface.

• It is commonly seen in new concrete structures but can also occur in older ones.

• Efflorescence can be removed using various cleaning methods such as brushing, pressure washing, or chemical treatments.

• Preventing efflorescence involves proper curing ...read more

I have completed over 50 engine removal and installation procedures.

• Completed over 50 engine removal and installation procedures

• Experienced in various types of engines such as diesel and gasoline

• Followed proper safety protocols and procedures during each removal and installation

Round 1 was a coding test.

• Round 1 of the interview process was a coding test.

• The coding test likely involved writing code to solve a problem or complete a task.

• The coding test may have been timed or untimed, and may have been completed remotely or in-person.

• The coding test may have been used to assess the candidate's technical skills and problem-solving abilities.

I am highly proficient in using electrical testing equipment.

• I have extensive experience using multimeters, oscilloscopes, and power analyzers.

• I am skilled in performing continuity tests, voltage measurements, and insulation resistance tests.

• I am familiar with troubleshooting electrical systems and identifying faults using testing equipment.

• I have successfully used thermal imaging cameras to detect overheating components in electrical panels.

Safety precautions before maintenance include proper training, wearing appropriate personal protective equipment, isolating energy sources, and following lockout/tagout procedures.

• Ensure proper training and understanding of maintenance procedures

• Wear appropriate personal protective equipment such as gloves, goggles, and helmets

• Isolate energy sources to prevent accidental startup

• Follow lockout/tagout procedures to ensure equipment is safely shut down and cannot be restarted

ALARA stands for As Low As Reasonably Achievable, a principle used in nuclear power stations to minimize radiation exposure.

• ALARA is a radiation protection principle that aims to keep radiation exposure to workers and the public as low as reasonably achievable.

• This is achieved by implementing various safety measures and protocols, such as using shielding, monitoring radiation levels, and limiting exposure time.

• Koeberg Nuclear Power Station in South Africa follows ALARA princi...read more

Extrusion presses are used to create products with a consistent cross-sectional profile by forcing material through a die.

• There are different types of extrusion presses based on the method of operation, such as direct extrusion press, indirect extrusion press, and impact extrusion press.

• Direct extrusion presses push the material through the die using a ram, while indirect extrusion presses pull the material through the die using a hollow ram.

• Impact extrusion presses use a pun...read more

The output voltage of one cell depends on the type of cell and its condition.

• Output voltage of a typical alkaline AA battery is around 1.5 volts

• Output voltage of a lithium-ion cell is around 3.7 volts

• Output voltage of a car battery is around 12 volts

Sheet metal process involves shaping and forming thin metal sheets into desired shapes and structures.

• Sheet metal process is used in various industries like automotive, aerospace, construction, and electronics.

• It includes cutting, bending, punching, and welding of metal sheets.

• Sheet metal is commonly used to create components like panels, enclosures, brackets, and ducts.

• Examples of sheet metal processes include laser cutting, press brake forming, and spot welding.

CRDI and MPFI are fuel injection systems used in automobiles. CRDI is used in diesel engines while MPFI is used in petrol engines.

• CRDI stands for Common Rail Direct Injection and MPFI stands for Multi-Point Fuel Injection.

• CRDI injects fuel directly into the engine cylinder while MPFI injects fuel into the intake manifold.

• CRDI is more efficient and provides better fuel economy than MPFI.

• CRDI is used in diesel engines while MPFI is used in petrol engines.

• CRDI is more expensive ...read more

VCB stands for Vacuum Circuit Breaker and ACB stands for Air Circuit Breaker. Both are types of circuit breakers used in electrical systems.

• VCB uses vacuum as the arc quenching medium, while ACB uses air.

• VCB is more reliable and requires less maintenance compared to ACB.

• VCB is more suitable for medium voltage applications, while ACB is commonly used in low voltage applications.

• VCB has a faster operation time compared to ACB.

• Examples: Siemens VCB, Schneider ACB

The main components of a transformer include the core, windings, and insulation.

• Core: Provides a path for the magnetic flux and is usually made of laminated steel.

• Windings: Consist of primary and secondary coils of wire wrapped around the core.

• Insulation: Prevents short circuits between the windings and ensures electrical safety.

• Examples: Core - laminated steel, Windings - copper wire, Insulation - varnish or paper

There are various ideas for handling machines and alarms, depending on the specific situation.

• Regular maintenance and calibration of machines can prevent malfunctions and false alarms.

• Proper training of personnel on machine operation and alarm response is crucial.

• Implementing automated systems for monitoring and alerting can improve efficiency and accuracy.

• Having a clear protocol for handling alarms and addressing machine issues can minimize downtime and safety risks.

A compressor works by compressing air or gas to increase its pressure and decrease its volume.

• The compressor takes in air or gas and compresses it using a piston or rotating impeller.

• The compressed air or gas is then stored in a tank or released through a nozzle.

• Compressors are used in various applications such as air conditioning, refrigeration, and pneumatic tools.

• Regular maintenance is required to ensure proper functioning of the compressor.

The bearing used in an ID fan is typically a ball bearing.

• ID fans in industrial applications often use ball bearings for their high load capacity and durability.

• Ball bearings are designed to handle radial and axial loads, making them suitable for the rotating shaft of an ID fan.

• Other types of bearings, such as roller bearings or sleeve bearings, may also be used depending on the specific requirements of the ID fan.

An engineering drawing is a detailed and precise graphical representation of an object or structure, typically used in the design and manufacturing process.

• Engineering drawings provide detailed information about the size, shape, and dimensions of components or products.

• They often include annotations, symbols, and notes to convey specific instructions or specifications.

• Common types of engineering drawings include orthographic projections, isometric views, and exploded views.

• En...read more

I am motivated by the desire to make a positive impact and achieve personal growth.

• Making a difference in people's lives

• Challenging myself to learn and improve

• Working towards a larger goal or mission

• Recognition and appreciation for my efforts

• Personal satisfaction and fulfillment

A micron filter is a type of filter used to remove particles and contaminants from a fluid by trapping them based on their size.

• Micron filters are commonly used in industries such as pharmaceuticals, food and beverage, and electronics manufacturing.

• They are designed to capture particles of a specific size, typically ranging from 0.1 to 10 microns.

• Micron filters can be made of various materials such as polypropylene, nylon, or ceramic.

• Examples of applications include filtering...read more

Chassis center is the central part of a vehicle's frame where the engine system is mounted and connected to the transmission.

• Chassis center is the backbone of a vehicle's frame that supports the weight of the engine and other components.

• The engine system includes the engine, transmission, drivetrain, and other related components that work together to power the vehicle.

• The engine system is mounted on the chassis center and connected to the transmission, which transfers power t...read more

The BUS speed refers to the speed at which data is transferred between the computer's motherboard and other components.

• The BUS speed is measured in megahertz (MHz) or gigahertz (GHz).

• A higher BUS speed generally indicates faster data transfer.

• Different components of a computer, such as the CPU, RAM, and graphics card, may have different BUS speeds.

• For example, a CPU may have a BUS speed of 3.2 GHz, while RAM may have a BUS speed of 3200 MHz.

The unit of speed is meters per second (m/s) or kilometers per hour (km/h).

• Speed is the measure of how fast an object is moving.

• The SI unit of speed is meters per second (m/s).

• Another commonly used unit of speed is kilometers per hour (km/h).

• Other units of speed include miles per hour (mph) and feet per second (ft/s).

The machines running can vary depending on the context.

• Machines running can include computers, printers, scanners, and other electronic devices.

• In an industrial setting, machines running can include manufacturing equipment, conveyor belts, and robots.

• In a medical field, machines running can include MRI machines, X-ray machines, and ultrasound machines.

The parts of a transformer include the core, windings, and insulation materials.

• Core: Provides a path for magnetic flux and is usually made of laminated steel

• Windings: Consist of primary and secondary coils wrapped around the core

• Insulation materials: Used to insulate the windings and prevent short circuits

I have 10 years of experience in maintenance, specializing in HVAC systems.

• 10 years of experience in maintenance

• Specialize in HVAC systems

• Familiar with troubleshooting and repair techniques

• Experience with preventative maintenance programs

A pulley is a simple machine that uses a wheel and rope to lift heavy objects.

• There are three types of pulleys: fixed, movable, and compound.

• Fixed pulleys change the direction of the force applied to the rope.

• Movable pulleys increase the mechanical advantage of the system.

• Compound pulleys combine fixed and movable pulleys to increase both the direction change and mechanical advantage.

• Examples of pulleys include cranes, flagpoles, and elevators.

TSB stands for Technical Service Bulletin.

• TSB is a document issued by a manufacturer to provide information and instructions regarding a specific technical issue or problem.

• It is typically distributed to technicians and service centers to help them diagnose and repair the issue.

• TSBs often include step-by-step instructions, diagrams, and recommended solutions.

• They can cover a wide range of topics, such as software updates, recalls, troubleshooting procedures, and service recom...read more

VR stands for virtual reality. It is a technology that uses computer-generated environments to simulate a physical presence in real or imagined worlds.

• VR has three main parts: the hardware (such as headsets and controllers), the software (applications and games), and the user experience (interaction and immersion).

• Examples of VR hardware include Oculus Rift, HTC Vive, and PlayStation VR.

• Examples of VR software include virtual tours, immersive games, and training simulations.

The unit of electric charge is the coulomb (C).

• The unit of electric charge is a fundamental quantity in physics.

• It is denoted by the symbol 'Q'.

• One coulomb is equal to the charge of approximately 6.242 × 10^18 electrons.

• Electric charge is measured using an instrument called an electrometer.

A train can run on single phase by using a single-phase AC traction system.

• Single-phase AC traction system uses a single-phase supply to power the train's motors.

• The system includes a converter to convert the single-phase AC supply to DC for the motors.

• Examples of trains using single-phase traction systems include light rail systems and some commuter trains.

Machines require maintenance to ensure optimal performance and prevent breakdowns.

• Regular maintenance prevents wear and tear on machine parts

• Maintenance ensures machines are operating at peak efficiency

• Preventative maintenance can save money in the long run by avoiding costly repairs

• Maintenance can also improve safety by identifying potential hazards

• Examples include oil changes, filter replacements, and cleaning

• Neglecting maintenance can lead to decreased productivity and inc...read more

The lifespan of a network wire depends on various factors such as quality, usage, and environment.

• The quality of the wire plays a major role in determining its lifespan.

• The frequency of usage and the amount of stress put on the wire also affect its lifespan.

• The environment in which the wire is installed can impact its lifespan. Exposure to extreme temperatures, moisture, and chemicals can shorten its lifespan.

• On average, a network wire can last anywhere from 5 to 25 years.

• Reg...read more