800+ Service Engineer Interview Questions and Answers

The compulsory policy excess in four wheeler private vehicles varies based on the vehicle's engine capacity.

• For vehicles with engine capacity less than 1500cc, the compulsory policy excess is Rs. 1000

• For vehicles with engine capacity between 1500cc and 2000cc, the compulsory policy excess is Rs. 2000

• For vehicles with engine capacity above 2000cc, the compulsory policy excess is Rs. 7500

I would like a competitive salary that reflects my skills and experience.

• I am looking for a salary that is commensurate with the responsibilities and requirements of the Service Engineer role.

• I have researched the average salary range for Service Engineers in this industry and location.

• I am open to negotiation and would like to discuss the salary package in more detail during the interview.

• I value fair compensation for my expertise and contributions to the company.

The basic hydraulic system consists of various valves and pumps that work together to control fluid flow and pressure.

• Valves in a hydraulic system control the direction, flow rate, and pressure of the fluid.

• Examples of valves include check valves, relief valves, and control valves.

• Pumps in a hydraulic system generate the flow and pressure of the fluid.

• Examples of pumps include gear pumps, vane pumps, and piston pumps.

• Hydraulic schematics are diagrams that illustrate the layou...read more

As a Service Engineer, I coordinated with other technicians to improve system integration, tested malfunctioning equipment using diagnostic tools, and completed repairs and maintenance procedures to earn excellent customer feedback.

• Coordinated with other technicians to improve system integration

• Used diagnostic tools to isolate problem areas and create repair plan

• Completed repairs, upgrades, and routine maintenance procedures

• Earned excellent customer feedback for efficient wor...read more

The speed difference in a hydraulic ram is due to the difference in effective areas on the head side and rod side.

• The head side of the ram has a larger effective area, resulting in slower speed.

• The rod side of the ram has a smaller effective area, resulting in faster speed.

• This speed difference is a result of the hydraulic pressure acting on different areas.

• The speed ratio between the head side and rod side can be calculated using the effective areas.

• Example: If the head side...read more

AC and DC differ in the direction of electron flow. DC flows steadily in one direction while AC switches direction.

• AC stands for alternating current while DC stands for direct current

• AC is commonly used in household appliances while DC is used in batteries and electronic devices

• AC can travel long distances without losing much energy while DC cannot

• Examples of AC sources include power grids and generators while examples of DC sources include batteries and solar cells

Questions related to tyres, wear, and pressure for a Service Engineer position.

• Tyres are made of rubber and provide traction for vehicles

• There are two types of wear: normal wear and irregular wear

• NSD stands for 'Newly Standardized Dimension'

• Wear is the gradual loss of material from the surface of an object

• PSI stands for 'Pounds per Square Inch'

• Types of tyres include: summer, winter, all-season, performance, and off-road

• Types of tyre structure include: bias-ply, radial, and be...read more

The body panels in a car that can be seen from outside include the hood, doors, fenders, roof, trunk, and bumpers.

• Hood: Covers the engine compartment

• Doors: Provide access to the interior

• Fenders: Located above the wheels

• Roof: Covers the passenger compartment

• Trunk: Provides storage space

• Bumpers: Protect the front and rear of the car

Yes, I have worked on HHP Engines.

• HHP stands for High Horsepower.

• HHP Engines are commonly used in heavy-duty applications such as mining, construction, and marine industries.

• Power ratings of HHP Engines can vary depending on the specific model and application.

• For example, the Caterpillar C175-20 HHP Engine has a power rating of up to 4000 horsepower.

• Other HHP Engines may have power ratings ranging from 1000 to 5000 horsepower.

The interview question covers topics related to pH levels, pump types, materials, vacuum pressure, and reactor glass thickness.

• pH levels range from acidic to alkaline

• Different types of pumps include oil ring vacuum and centrifugal pumps

• Materials used can be MSGI or SS

• Vacuum pressure is measured in Torr

• Glass thickness in glassline reactors can range from 0.5 to 2mm

To do warranty of a battery, assess the warranty period, determine the terms and conditions, and provide necessary documentation.

• Assess the warranty period offered by the manufacturer or seller

• Determine the terms and conditions of the warranty, such as coverage, limitations, and exclusions

• Provide necessary documentation, including proof of purchase and warranty registration

• Inspect and evaluate the battery for any defects or issues

• Repair or replace the battery within the warra...read more

Questions related to pH, impellers, pumps, reactors, alignment, brine, cooling tower, and glass thickness for a Service Engineer role.

• The pH range for acidic solutions is 0-6.9 and for basic solutions is 7.1-14.

• Types of impellers include radial, axial, and mixed flow.

• Types of pumps handled may include centrifugal, positive displacement, and diaphragm pumps.

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

• The allowed drop for a reactor depen...read more

PNP transistor is a type of bipolar junction transistor. Multimeter is used to measure voltage, current and resistance. Tracing a circuit involves identifying the path of current flow. Mounting and unmounting components on PCB involves soldering and desoldering.

• PNP transistor is a three-layer semiconductor device with emitter, base and collector regions.

• Multimeter can be used in different modes such as voltage, current and resistance mode.

• To trace a circuit, start from the po...read more

Risk analysis involves identifying potential risks in a project or job and taking steps to mitigate them.

• Risk analysis involves identifying potential hazards or risks in a project or job.

• It includes assessing the likelihood of these risks occurring and the potential impact they could have.

• Steps are then taken to mitigate or eliminate these risks to ensure the safety of the project and personnel.

• For example, in a previous job, I conducted risk analysis for a complex HVAC insta...read more

I analyze the failure, identify the root cause, and take corrective actions to prevent it from happening again.

• I remain calm and composed to analyze the situation

• I identify the root cause of the failure

• I take corrective actions to prevent it from happening again

• I document the failure and the steps taken to prevent it

• I communicate the failure and the preventive measures to the team and management

To determine if the noise is from the gears or transmission, you can perform a few diagnostic tests.

• Listen for the noise while the vehicle is stationary and the engine is running. If the noise is present, it is likely coming from the transmission.

• Check if the noise changes when shifting gears. If the noise only occurs during gear changes, it is likely related to the transmission.

• Inspect the transmission fluid for any signs of metal shavings or debris. This could indicate a pr...read more

Yes, I have knowledge about lab analysis and plants operating like RO, DM etc.

• I have experience in conducting lab analysis for water treatment plants

• I am familiar with Reverse Osmosis (RO) and Deionization (DM) processes

• I have worked with various types of water treatment plants including municipal and industrial

• I am knowledgeable about the equipment and chemicals used in water treatment processes

To improve tyre life, factors such as wheel balancing, alignment, and proper maintenance should be considered.

• Regularly check and maintain proper tyre pressure

• Rotate tyres regularly to ensure even wear

• Avoid overloading the vehicle

• Avoid harsh braking and acceleration

• Ensure proper wheel alignment and balancing

• Avoid driving on rough or uneven surfaces

• Regularly inspect tyres for signs of damage or wear

• Use high-quality tyres suitable for the vehicle and driving conditions

The type of paints used in four wheelers vary depending on the purpose and desired finish.

• Automotive paints are typically classified into three types: solid, metallic, and pearl.

• Solid paints are single-color paints that provide a glossy finish.

• Metallic paints contain small metallic flakes that create a sparkling effect.

• Pearl paints have a translucent appearance and contain ceramic crystals for a shimmering effect.

• Other types of paints used in four wheelers include matte, sati...read more

Various types of relays are used in the Indian railway signalling system.

• Electromagnetic relays are commonly used in the Indian railway signalling system.

• Track circuit relays are used to detect the presence of trains on the tracks.

• Route relays are used to control the movement of trains on different routes.

• Interlocking relays ensure the safe operation of railway signals and points.

• Time delay relays are used for controlling the timing of signals and points.

• Examples of relays us...read more

Open loop and closed loop are two modes of operation in hydraulic systems.

• Open loop operation: The hydraulic system operates without feedback control. The output is not adjusted based on the system's performance.

• Closed loop operation: The hydraulic system uses feedback control to adjust the output based on the system's performance.

• Open loop systems are simpler and less expensive, but they lack precision and accuracy.

• Closed loop systems are more complex and costly, but they of...read more

A pressure relief valve is used to protect equipment and systems from excessive pressure by releasing the pressure when it exceeds a certain limit.

• Prevents damage to equipment and systems

• Ensures safety of personnel

• Maintains system integrity

• Prevents explosions or ruptures

• Relieves excess pressure by opening and releasing fluid or gas

• Commonly used in boilers, pressure vessels, pipelines, and hydraulic systems

To identify a faulty motor, I would apply my knowledge of motor functioning and consider factors such as noise, vibration, and temperature.

• Check for abnormal noise or vibration during operation

• Measure the temperature of the motor during operation

• Inspect the motor for physical damage or wear and tear

• Check the electrical connections and wiring for any faults

• Perform diagnostic tests to identify the specific issue

• Consider the age and usage of the motor

A circuit breaker is an electrical switch that automatically interrupts the flow of current in a circuit in case of an overload or short circuit.

• It is a safety device used to protect electrical circuits from damage caused by excess current flow.

• It works by detecting the excess current and interrupting the flow of electricity to prevent damage to the circuit.

• Circuit breakers are commonly used in homes, buildings, and industrial settings.

• Examples of circuit breakers include the...read more

The minimum number of rods in an RCC column depends on various factors such as column size, load, and design requirements.

• The minimum number of rods in an RCC column is determined by the cross-sectional area of the column and the spacing between the rods.

• The purpose of providing multiple rods is to ensure the structural integrity and strength of the column.

• The number of rods required can be calculated using the formula: Number of rods = (Cross-sectional area of column / Area ...read more

Turbocharger increases engine power by compressing air and increasing oxygen supply. Boost pressure improves engine performance.

• Turbocharger is a device that uses exhaust gases to compress air and deliver it to the engine

• It increases the density of air entering the engine, allowing more fuel to be burned and increasing power output

• Boost pressure refers to the amount of pressure above atmospheric pressure that the turbocharger delivers to the engine

• Higher boost pressure result...read more

There are various types of engines and maintenance procedures. Checklists are used to ensure proper maintenance.

• Types of engines include diesel, gasoline, electric, and hybrid.

• Maintenance procedures include routine maintenance, preventive maintenance, and corrective maintenance.

• Checklists are used to ensure proper maintenance and include items such as checking fluid levels, inspecting belts and hoses, and testing battery voltage.

• Maintenance schedules vary depending on the typ...read more

Compression ratio is calculated by dividing the volume of the cylinder when the piston is at the bottom by the volume when it's at the top. Inlet and exhaust valve sizes differ due to different requirements.

• Compression ratio = volume at bottom of piston stroke / volume at top of piston stroke

• Inlet valve is larger to allow more air-fuel mixture into the cylinder

• Exhaust valve is smaller to create higher velocity and better scavenging of exhaust gases

• Valve sizes are determined b...read more

I communicate openly with the manufacturer or client to understand the discrepancies and work towards finding a resolution.

• Openly communicate with the manufacturer or client to discuss the discrepancies

• Provide detailed explanations of your inspection findings and listen to their perspective

• Work collaboratively to find a resolution that satisfies both parties

• Refer to any relevant documentation or standards to support your findings

• Seek guidance from senior engineers or experts ...read more

I am familiar with standards such as ISO 9001, IATF 16949, and regulations like FMVSS and ECE. I ensure compliance through regular training, audits, and documentation.

• Familiar with ISO 9001 for quality management systems

• Knowledge of IATF 16949 for automotive quality management

• Understanding of regulations such as FMVSS (Federal Motor Vehicle Safety Standards) and ECE (Economic Commission for Europe)

• Regular training sessions to keep up-to-date with industry standards

• Conducting ...read more

First Angle Projection and Third Angle Projection can be distinguished by the position of the object and the projection planes.

• First Angle Projection places the object in the first quadrant and the projection planes are placed between the object and the observer.

• Third Angle Projection places the object in the third quadrant and the projection planes are placed behind the object.

• In First Angle Projection, the views are obtained by projecting the object onto the planes of proje...read more

The market potential for machine tools is significant due to increasing industrialization and automation.

• Growing demand for machine tools in various industries such as automotive, aerospace, and electronics

• Rapid industrialization in emerging economies like China and India

• Advancements in technology leading to the development of advanced machine tools

• Increasing focus on automation and precision in manufacturing processes

• Potential for machine tools in sectors like medical device...read more

Compulsory policy excess is the amount that the policyholder has to pay in case of a claim in a two-wheeler insurance policy.

• It is a fixed amount that is pre-decided by the insurance company.

• It is applicable for every claim made by the policyholder.

• The policyholder has to pay this amount before the insurance company starts paying for the claim.

• It is a way for the insurance company to reduce the number of small claims made by policyholders.

• For example, if the compulsory policy...read more

A radar system is used to measure water level depth and display the value.

• Radar technology is used to send and receive signals to measure the distance to the water surface.

• The time taken for the signal to bounce back is used to calculate the water level depth.

• The radar system then displays the measured water level value.

• Examples of radar systems used for water level measurement include ultrasonic radar and microwave radar.

Railway signalling refers to the system used to direct railway traffic and ensure safety.

• Railway signalling includes various components such as signals, points, and interlocking systems.

• Signals are used to indicate to train drivers when it is safe to proceed or stop.

• Points are used to switch trains from one track to another.

• Interlocking systems ensure that conflicting movements cannot occur.

• Railway signalling has evolved over time, from manual systems to computerized systems....read more

Patents protect an entrepreneur's intellectual property and provide a competitive advantage.

• Patents prevent others from copying an entrepreneur's invention or idea.

• Patents provide legal protection and can be used to sue infringers.

• Patents can increase the value of a company and attract investors.

• Patents can also be licensed or sold for profit.

• Examples include the patent for the iPhone's touch screen technology and the patent for the first successful polio vaccine.

The components used in EV powertrain department include battery, motor, inverter, gearbox, and charging system.

• Battery provides power to the motor

• Motor converts electrical energy into mechanical energy

• Inverter converts DC power from battery to AC power for the motor

• Gearbox controls the speed and torque of the motor

• Charging system charges the battery

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. A diode is a two-terminal electronic component that conducts current primarily in one direction. A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. An uninterruptible power supply (UPS) is a device that provides emergency ...read more

A hydraulic circuit diagram is a schematic representation of a hydraulic system, showing the flow of fluid and the various components involved.

• A hydraulic circuit typically consists of a pump, valves, actuators, and fluid lines.

• The pump is responsible for generating hydraulic pressure by converting mechanical energy into fluid flow.

• Valves control the direction, flow rate, and pressure of the hydraulic fluid.

• Actuators, such as cylinders or motors, convert hydraulic energy into...read more

To detect earth leakage problem in a module, measure the current flowing through the earth wire.

• Measure the current flowing through the earth wire using a clamp meter.

• If the current is above the specified limit, then there is an earth leakage problem.

• Check the wiring and connections for any faults or damages.

• Perform insulation resistance test to confirm the issue.

• If the problem persists, consult with a qualified electrician.

When the limit switch brakes but you have to run, it can lead to potential damage or malfunction.

• Running the system without the limit switch can result in overloading or exceeding safe operating limits.

• It may cause damage to the equipment or components due to excessive force or movement.

• Without the limit switch, there is a risk of the system operating outside its intended range, leading to safety hazards.

• Continuing to run without the limit switch can void warranties or insura...read more

TDS should be less than 500 ppm and hardness of water varies depending on location.

• TDS (Total Dissolved Solids) should be less than 500 ppm (parts per million) for safe consumption.

• Hardness of water varies depending on location and can be measured in terms of calcium and magnesium ions.

• Water with high levels of calcium and magnesium ions is considered hard water and can cause scaling in pipes and appliances.

• Water softeners can be used to reduce the hardness of water.

• Water wit...read more

Applying DC current to a transformer will cause the transformer to saturate, leading to overheating and potential damage.

• DC current does not alternate direction like AC current, causing a build-up of magnetic flux in the transformer core

• This leads to saturation of the core, increasing losses and heat generation

• Over time, the transformer may overheat and potentially suffer damage

• Example: Applying DC current to a power transformer meant for AC current can lead to overheating an...read more

2mbar is higher than 5mbar in the case of a vacuum pump.

• In the case of a vacuum pump, the lower the pressure, the higher the vacuum level.

• Pressure is measured in units of pressure, such as millibar (mbar).

• So, 2mbar is a lower pressure than 5mbar, indicating a higher vacuum level.

Power electronics is the study of electronic circuits used to convert and control electric power.

• Power electronic components include diodes, transistors, thyristors, capacitors, inductors, and transformers.

• These components are used in circuits such as rectifiers, inverters, converters, and choppers.

• Power electronics is used in a variety of applications such as motor drives, renewable energy systems, and power supplies.

• Power electronics engineers design and develop these circu...read more

Yes, I know how to operate air circuit breaker.

• I am familiar with the basic components of an air circuit breaker.

• I know how to turn on and off the breaker.

• I am aware of the safety precautions that need to be taken while operating the breaker.

• I have experience in troubleshooting and repairing air circuit breakers.

• I am knowledgeable about the different types of air circuit breakers and their applications.

Ampere increases when motor runs in shut off head.

• Ampere is the measure of electrical current.

• Shut off head is the maximum head that a pump can generate.

• When the motor runs in shut off head, it experiences maximum resistance, causing the current to increase.