900+ Service Engineer Interview Questions and Answers

Load test of a transformer involves applying a load to the transformer and measuring its performance, while no load test involves measuring the transformer's performance without any load.

• Load test determines the efficiency and voltage regulation of the transformer under load conditions.

• No load test measures the core losses and magnetizing current of the transformer without any load connected.

• Load test helps in determining the actual power output of the transformer under speci...read more

Air compressor compresses air and sends it to air dryer which removes moisture and impurities. Oxygen generator separates oxygen from air.

• Air compressor compresses air and sends it to air dryer

• Air dryer removes moisture and impurities from compressed air

• Oxygen generator separates oxygen from air

• Oxygen generator uses Pressure Swing Adsorption (PSA) or Membrane technology

• PSA technology uses zeolite to separate oxygen from air

• Membrane technology uses semi-permeable membranes to ...read more

Enrolling biometric attendance system involves registering employees' biometric data and linking it to their unique identification number.

• Collect biometric data of employees such as fingerprints, iris scans, or facial recognition.

• Create a database to store the biometric data and link it to each employee's identification number.

• Train employees on how to use the biometric attendance system.

• Test the system to ensure accuracy and reliability.

• Regularly update and maintain the syst...read more

My action plan to satisfy customers involves understanding their needs, providing prompt and efficient service, and ensuring their satisfaction through effective communication and follow-up.

• Listen actively to customers to understand their requirements

• Respond promptly to customer inquiries and service requests

• Provide clear and concise explanations of technical issues and solutions

• Ensure timely resolution of customer problems

• Follow up with customers to ensure their satisfaction...read more

The step-by-step procedure if boom life is not working

• Check the power supply to the boom lift

• Inspect the control panel for any error codes or indicators

• Ensure all safety switches are engaged properly

• Inspect the hydraulic system for any leaks or malfunctions

• Check the boom lift's batteries and charging system

• Verify if the emergency stop button is engaged or if any other safety features are activated

• Consult the boom lift's manual or contact technical support for further troubles...read more

Yes, I have knowledge in Hoist drive application.

• I have experience in troubleshooting and repairing hoist drives.

• I am familiar with different types of hoist drives such as electric, hydraulic, and pneumatic.

• I have worked with hoist drives in various industries including construction and manufacturing.

• I am knowledgeable in the maintenance and safety procedures for hoist drives.

• I am able to read and interpret technical drawings and schematics related to hoist drives.

I would rely on my problem-solving skills and technical knowledge to troubleshoot and resolve the issue.

• I would gather as much information as possible about the fault from the customer or any available documentation

• I would use my technical knowledge and experience to identify potential causes and solutions

• I would consult with colleagues or experts if necessary

• I would test and verify any solutions before implementing them

• I would communicate clearly with the customer throughout...read more

Tappet setting is the clearance between the tappet and the valve stem. FIP setting is the fuel injection pump timing.

• Tappet setting is important for proper valve operation and engine performance.

• FIP setting determines the timing of fuel injection into the engine.

• Both settings require precise adjustments to ensure optimal engine performance.

• Tappet setting is usually measured in thousandths of an inch or millimeters.

• FIP setting is usually measured in degrees of crankshaft rotat...read more

IGBT stands for Insulated Gate Bipolar Transistor. It is a power semiconductor device used for switching and amplifying electrical signals.

• IGBT combines the advantages of both MOSFET and bipolar junction transistor.

• It has a high input impedance like a MOSFET and a low on-state voltage drop like a bipolar transistor.

• IGBTs are commonly used in applications such as motor drives, power supplies, and renewable energy systems.

• They can handle high voltage and current levels, making ...read more

Motor is fitted at headpulley of a conveyor for efficient power transmission.

• Headpulley is the first point of contact for the conveyor belt and is responsible for driving the belt.

• Fitting the motor at the headpulley ensures efficient power transmission as it eliminates the need for long belts and multiple pulleys.

• This also reduces the chances of belt slippage and improves the overall performance of the conveyor system.

Yes, I can do electrical load calculations. It involves determining the total power required for a system or circuit.

• Determine the power consumption of each electrical device in the system.

• Calculate the total power required by summing up the power consumption of all devices.

• Consider factors like voltage, current, and power factor in the calculation.

• Use formulas like P = VI for DC circuits and P = V x I x cos(theta) for AC circuits.

• Ensure the total power does not exceed the ca...read more

Resistance is the opposition to the flow of electric current, a diode is a semiconductor device that allows current to flow in one direction only, and a load cell is a transducer that converts force into an electrical signal.

• Resistance is measured in ohms and is used to control the flow of current in a circuit.

• A diode is a two-terminal electronic component that conducts current primarily in one direction.

• A load cell is a type of transducer that converts mechanical force into ...read more

The number of IO cards used in a machine varies depending on the specific machine and its requirements.

• The number of IO cards used in a machine depends on the complexity and functionality of the machine.

• Different machines may require different types and quantities of IO cards.

• IO cards are used to interface between the machine's control system and external devices or sensors.

• Some machines may require multiple IO cards to handle various inputs and outputs.

• The exact number of IO...read more

Tappet setting is the process of adjusting the clearance between the tappet and the valve stem in an engine.

• Tappet setting ensures proper valve timing and prevents engine damage.

• It involves adjusting the clearance between the tappet and the valve stem using a feeler gauge.

• The correct tappet setting varies depending on the engine model and manufacturer.

• Incorrect tappet setting can cause engine noise, poor performance, and even engine failure.

• Regular tappet setting maintenance ...read more

Yes, I am capable of handling repairs and touring for vehicle inspection.

• I have experience in repairing and inspecting vehicles.

• I am familiar with the tools and equipment required for repairs.

• I am willing to travel for vehicle inspections.

• I am able to communicate effectively with customers and colleagues.

• I am committed to providing high-quality service to customers.

A relay is an electrically operated switch. Blower machine is used for blowing air and filler machine is used for filling bottles.

• Relay is used to control high voltage circuits with low voltage signals.

• Blower machine is used to blow air into bottles to remove any dust or debris.

• Filler machine is used to fill bottles with liquid or gas.

• Bottling machine is used to package liquids or gases into bottles or containers.

PPM of dosing can be calculated by dividing the weight of the chemical added by the weight of the solution and multiplying by 1,000,000.

• Determine the weight of the chemical added

• Determine the weight of the solution

• Divide the weight of the chemical by the weight of the solution

• Multiply the result by 1,000,000 to get the PPM

• PPM = (Weight of Chemical / Weight of Solution) x 1,000,000

There are several arc methods used in commercial building design.

• Arc flash analysis

• Arc fault circuit interrupters

• Arc-resistant switchgear

• Arc welding

• Arc blast analysis

I am familiar with a wide range of medical equipment, tools, and resources.

• I have experience using diagnostic equipment such as X-ray machines, ultrasound machines, and MRI scanners.

• I am proficient in using surgical tools and instruments, including scalpels, forceps, and suturing materials.

• I am knowledgeable about medical devices like defibrillators, ventilators, and infusion pumps.

• I am familiar with laboratory equipment such as centrifuges, microscopes, and spectrophotometer...read more

The working principle of a Tetra Pak machine involves the process of filling, sealing, and packaging liquid food products in a sterile and aseptic manner.

• Tetra Pak machines are designed to handle various types of liquid food products such as milk, juices, and soups.

• The machine starts by sterilizing the packaging material and forming it into the desired shape.

• The liquid product is then filled into the pre-formed packages through a filling system.

• After filling, the packages are...read more

The generation voltage in India varies depending on the region and the type of power plant.

• The generation voltage for thermal power plants is typically 11 kV or 33 kV

• Hydroelectric power plants generate electricity at 11 kV or 22 kV

• Renewable energy sources like solar and wind generate electricity at 415 V or 11 kV

• The voltage is stepped up to 220 kV or 400 kV for transmission over long distances

• The voltage is then stepped down to 33 kV, 11 kV or 415 V for distribution to consum...read more

Backlash is the play or movement between mechanical components due to gaps or clearances.

• Backlash refers to the amount of movement or play that occurs between two mechanical components.

• It is caused by gaps or clearances between the components, which can result in imprecise or inaccurate movement.

• Backlash is commonly seen in gears, where the teeth have small gaps to allow for smooth engagement.

• For example, when a gear is rotated in one direction and then quickly reversed, ther...read more

HOLC stands for Hydraulic Oil Level Control. It is used in hydraulic systems to monitor and control the oil level. Pressure units include psi, bar, MPa.

• HOLC is used in hydraulic systems to monitor and control the oil level to ensure proper functioning.

• Pressure units commonly used include psi (pounds per square inch), bar, and MPa (megapascal).

• Proper maintenance of HOLC is essential for the efficient operation of hydraulic systems.

• Examples of pressure units: 1 bar = 14.5 psi, ...read more

Inverters are used to convert DC power to AC power. They work by converting the DC power to high-frequency AC power and then back to AC power at the desired frequency.

• Inverters are used in various applications such as solar power systems, uninterruptible power supplies (UPS), and electric vehicles.

• They work by using electronic components such as transistors and capacitors to convert DC power to high-frequency AC power.

• The high-frequency AC power is then transformed to the des...read more

Networking in a company allows for communication, data sharing, resource sharing, and collaboration among employees and departments.

• Facilitates communication between employees, departments, and branches

• Enables sharing of resources such as printers, servers, and internet connection

• Allows for centralized data storage and access

• Facilitates collaboration on projects and tasks

• Enhances security through network monitoring and access control

The most challenging aspect of customer service is managing difficult or irate customers.

• Handling customer complaints and resolving conflicts

• Maintaining professionalism and patience in stressful situations

• Balancing the needs of the customer with company policies and limitations

Proper power supply, mounting location, network connectivity, and recording device are required for installing a CCTV camera.

• Ensure proper power supply is available for the camera

• Select a suitable mounting location for optimal coverage

• Ensure network connectivity for remote access and monitoring

• Select a compatible recording device for storing footage

• Consider lighting conditions and weatherproofing for outdoor installations

BIOS stands for Basic Input/Output System. It is firmware that initializes hardware during the boot process and provides runtime services.

• BIOS is a firmware that is stored on a chip on the computer's motherboard.

• It is responsible for initializing and testing hardware components during the boot process.

• BIOS provides runtime services like managing system configuration settings and controlling input/output operations.

• It is the first software that runs when a computer is powered ...read more

Fire and safety security systems are essential for protecting lives and property from fire hazards.

• Fire and safety security systems are designed to detect and prevent fires, as well as provide early warning and evacuation measures.

• These systems typically include fire alarms, smoke detectors, fire extinguishers, sprinkler systems, and emergency lighting.

• Service engineers play a crucial role in installing, maintaining, and troubleshooting these systems to ensure their proper fu...read more

The 12-Line Big Yard LED display uses 48 modules.

• The 12-Line Big Yard LED display uses 48 modules in total.

• Each line of the display consists of 4 modules.

• Therefore, 12 lines x 4 modules per line = 48 modules in total.

SI engines use spark plugs for ignition, while CI engines use compression for ignition.

• SI engines have spark plugs to ignite the air-fuel mixture, while CI engines rely on compression to ignite the fuel.

• SI engines are commonly used in gasoline vehicles, while CI engines are typically found in diesel vehicles.

• SI engines have a higher power output compared to CI engines.

• SI engines have a higher fuel efficiency compared to CI engines.

Electrical equipment plays a crucial role in powering and controlling various systems and processes.

• Electrical equipment is responsible for generating, distributing, and controlling power in various industries.

• It is used in a wide range of applications, from simple household appliances to complex industrial machinery.

• Electrical equipment includes generators, transformers, motors, switches, and control systems.

• It is essential for maintaining the safety and efficiency of variou...read more

Electronic components work based on Ohm's Law, which relates voltage, current, and resistance.

• Ohm's Law states that V = I * R, where V is voltage, I is current, and R is resistance.

• Electronic components such as resistors, capacitors, and inductors follow Ohm's Law in their operation.

• Understanding Ohm's Law helps in designing and troubleshooting electronic circuits.

• For example, in a circuit with a 12V battery and a 4 ohm resistor, the current flowing through the resistor would...read more

AC and DC currents are two types of electrical currents. AC current periodically changes direction, while DC current flows in one direction.

• AC current stands for Alternating Current and periodically changes direction.

• DC current stands for Direct Current and flows in one direction.

• AC current is commonly used in household electrical systems.

• DC current is used in batteries and electronic devices.

• Examples of AC current sources include power grids and generators.

• Examples of DC cur...read more

There is currently no cure for HIV, but antiretroviral therapy can effectively suppress the virus.

• Antiretroviral therapy (ART) is a combination of medications that can suppress the virus and prevent progression to AIDS.

• ART does not cure HIV, but it can reduce the amount of virus in the body to undetectable levels.

• There is currently no known cure or vaccine for HIV, but research is ongoing.

• After 2 years of ART, the virus can be suppressed to undetectable levels, but it is stil...read more

No, there is no cure for HIV yet and an antidote has not been found.

• HIV is a virus that attacks the immune system and there is no cure for it yet.

• Antiretroviral therapy (ART) can help manage HIV and prevent it from progressing to AIDS.

• Research is ongoing to find a cure for HIV, but it is a complex virus that mutates quickly.

• An antidote is a substance that can counteract the effects of a poison or toxin, but HIV is not a poison or toxin.

I have worked on various security products including firewalls, antivirus software, and intrusion detection systems.

• Experience with configuring and managing firewalls such as Cisco ASA and Fortinet FortiGate

• Familiarity with antivirus software such as Symantec Endpoint Protection and McAfee VirusScan

• Knowledge of intrusion detection systems like Snort and Suricata

• Experience with security information and event management (SIEM) tools like Splunk and QRadar

• Understanding of networ...read more

The purpose of engine service is to maintain and optimize the performance, reliability, and longevity of an engine.

• Regular engine service helps identify and address potential issues before they become major problems.

• Engine service includes tasks such as oil changes, filter replacements, and spark plug inspections.

• It ensures proper lubrication, cooling, and fuel efficiency.

• Engine service can improve overall engine performance, power output, and fuel economy.

• It extends the life...read more

Heat exchange in hydraulic machines is used to regulate temperature and prevent overheating.

• Heat exchange helps to maintain the temperature of hydraulic fluid within a safe operating range.

• It prevents overheating of the hydraulic system, which can cause damage to the components.

• Heat exchangers can be air-cooled or liquid-cooled, depending on the application.

• Examples of hydraulic machines that use heat exchange include excavators, cranes, and hydraulic presses.

To check the problem in a windvane showing false reading, first ensure it is properly aligned and calibrated. Then check for any obstructions or damage.

• Ensure the windvane is properly aligned and calibrated according to manufacturer's instructions.

• Check for any obstructions such as debris or bird nests that may be affecting the vane's movement.

• Inspect the vane for any damage or wear that could be causing inaccurate readings.

• Verify that the vane is securely attached to the mou...read more

Power factor is maintained by using power factor correction devices like capacitors. Benefits include reduced electricity costs and improved efficiency.

• Power factor can be maintained by using power factor correction devices such as capacitors to offset the inductive load of motors and other equipment.

• Maintaining a high power factor (close to 1) reduces the amount of reactive power flowing through the system, leading to lower electricity costs.

• Improved power factor also result...read more

An encoder is a device that converts motion or position into an electrical signal. A pneumatic cylinder is a mechanical device that uses compressed air to produce force in a reciprocating linear motion.

• Encoders are commonly used in robotics, CNC machines, and automation systems to provide feedback on position and speed.

• Pneumatic cylinders are used in many industrial applications, such as assembly lines, packaging machines, and material handling systems.

• A pneumatic system is a...read more

Engine converts reciprocating motion into rotary motion to generate power.

• The piston moves up and down in a cylinder, which is connected to a crankshaft.

• The crankshaft converts the reciprocating motion of the piston into rotary motion.

• The rotary motion is then used to power the vehicle or machine.

• The process is repeated in a cycle to generate continuous power.

The pump rpm for a 75cc pump with a flow rate of 112.5 per minute needs to be calculated.

• Use the formula RPM = (flow rate x 231) / pump displacement

• Substitute the given values to get the answer

• The answer is 1910 RPM

The ball screw bearing replacement procedures involve several steps to ensure proper installation and functionality.

• Start by removing the old ball screw bearing carefully to avoid any damage.

• Clean the mounting surface and inspect for any signs of wear or damage.

• Apply lubrication to the new ball screw bearing before installation.

• Align the bearing properly and secure it in place using the appropriate tools.

• Test the functionality of the new bearing to ensure smooth operation.

• Pro...read more

A hydraulic circuit is a system that uses pressurized fluid to transmit power.

• A hydraulic pump is used to create pressure in the fluid.

• Valves control the flow of fluid through the circuit.

• Actuators, such as cylinders or motors, convert the fluid pressure into mechanical force.

• A reservoir stores the fluid and a filter removes contaminants.

• Examples include excavators, cranes, and hydraulic presses.

If spare parts cannot be collected on site, alternative solutions must be explored.

• Check if the spare part can be sourced from a nearby location

• Explore the possibility of using a substitute spare part

• Consult with the customer to see if the repair can be delayed until the spare part can be collected

• If all else fails, escalate the issue to higher management for a resolution