50+ Service Technician Interview Questions and Answers

Three-phase supply consists of three alternating currents, while single-phase supply has only one alternating current.

• Three-phase supply is commonly used in industrial and commercial settings.

• Single-phase supply is typically used in residential applications.

• Three-phase supply provides more power and is more efficient than single-phase supply.

• Three-phase supply requires three conductors, while single-phase supply requires only two.

• Examples of three-phase devices include motors...read more

MCBs are more reliable and safer than fuses.

• MCBs can be reset and reused, while fuses need to be replaced after every trip

• MCBs have a faster response time than fuses, which can prevent damage to equipment

• MCBs have better overload protection than fuses

• MCBs are more convenient to use as they do not require replacement every time they trip

• MCBs are safer as they do not release harmful gases or debris when they trip

There are typically 5 nuts in the alloy wheel of an Ola scooter.

• Most alloy wheels have 4-6 nuts for securing the wheel to the hub

• Ola scooters commonly have 5 nuts in their alloy wheels

• The nuts are used to securely fasten the wheel to the hub

The first thing to check when a bike has starting trouble is the battery.

• Check the battery voltage and connections.

• Ensure the battery is fully charged.

• Inspect the battery terminals for corrosion or damage.

• Test the battery with a multimeter to determine its health.

• If necessary, replace the battery.

Difference between hardware and software, testing hardware components, troubleshooting process, and common computer components.

• Hardware refers to physical components of a computer while software refers to programs and applications.

• Drivers are software programs that allow hardware to communicate with the operating system.

• Hardware components can be tested using diagnostic tools or by physically inspecting them.

• The first step of the troubleshooting process is to identify the pro...read more

Applying plastic object paint on sheet metal objects can have both short-term and long-term effects.

• In the short term, the paint can provide a protective layer against corrosion and damage.

• In the long term, the paint may start to peel or chip, exposing the sheet metal to potential rust and deterioration.

• The paint may also affect the thermal conductivity of the sheet metal, potentially impacting its heat dissipation capabilities.

• The choice of paint and its compatibility with t...read more

New fan regulators are more energy-efficient and have additional features compared to old ones.

• Old fan regulators use resistors to control the speed of the fan, while new ones use electronic circuits.

• New fan regulators have additional features such as remote control, timer, and speed settings.

• Old fan regulators are less energy-efficient and can cause the fan to make noise or vibrate.

• New fan regulators are more reliable and have a longer lifespan compared to old ones.

Yes, I am confident in working with axel swing arm on road side.

• I have experience working with axel swing arms in previous roles

• I am familiar with the necessary tools and techniques for handling axel swing arms

• I am comfortable working on road side and can adapt to different environments

• I prioritize safety protocols when working with heavy machinery

I would diagnose the issue, check for any faulty parts, and repair or replace them as necessary.

• Diagnose the issue by checking the thermostat, air filter, and electrical connections.

• Check for any faulty parts such as the compressor, fan motor, or refrigerant leaks.

• Repair or replace the faulty parts as necessary.

• Test the air conditioner to ensure it is functioning properly.

• Provide recommendations to the customer on how to prevent future issues.

The battery voltage in Ola scooter is typically around 48V.

• The battery voltage in Ola scooters is usually around 48V.

• The exact voltage may vary slightly depending on the specific model of the scooter.

• It is important to check the battery voltage regularly to ensure optimal performance.

The MCU (Motor Control Unit) is assembled to Ola scooters to control the motor and ensure efficient performance.

• MCU controls the motor of the scooter

• Ensures efficient performance

• Regulates speed and power output

• Monitors battery usage and charging

I have 5 years of experience as a Service Technician with a repair level of advanced proficiency.

• 5 years of experience in servicing various equipment and machinery

• Advanced proficiency in diagnosing and repairing mechanical and electrical issues

• Certified in handling specialized tools and equipment

• Familiar with troubleshooting software and hardware problems

• Experience in conducting preventive maintenance to prevent future breakdowns

HMI in Ola scooter work stands for Human Machine Interface, which is the interface through which a user interacts with the scooter's systems.

• HMI in Ola scooter work refers to the display screen and controls that allow the rider to interact with the scooter's functions.

• It includes features like speedometer, battery level indicator, mode selection, and settings menu.

• The HMI may also include touch screen capabilities for easier navigation and control.

• The design and layout of the...read more

HMI work in Ola scooter involves designing and implementing the Human Machine Interface for the scooter's digital display and controls.

• Designing the layout and functionality of the digital display on the scooter

• Implementing touch screen capabilities for user interaction

• Integrating features like navigation, music controls, and vehicle settings into the interface

• Ensuring user-friendly and intuitive design for easy use while riding

• Collaborating with software and hardware teams t...read more

There are several types of refrigeration gases, including R-22, R-134a, R-404A, and R-410A.

• Refrigeration gases are used in air conditioning and refrigeration systems to transfer heat.

• Different types of refrigeration gases have different properties and are used for different applications.

• Some common types of refrigeration gases include R-22, R-134a, R-404A, and R-410A.

• R-22 is a hydrochlorofluorocarbon (HCFC) that is being phased out due to its impact on the ozone layer.

• R-134a ...read more

The operating parameters of gases depend on their type and intended use.

• Operating parameters include pressure, temperature, flow rate, and composition.

• For example, medical gases like oxygen and nitrous oxide have specific purity requirements.

• Industrial gases like nitrogen and argon may require high pressure and flow rates for certain applications.

• The operating parameters must be carefully monitored and controlled to ensure safety and efficiency.

• Different gases may have differ...read more

A fitter is a skilled worker who assembles, installs, and repairs machinery and equipment.

• A fitter is responsible for assembling and installing machinery and equipment according to specifications.

• They may also be involved in repairing and maintaining machinery.

• Fitters use various tools and techniques to ensure proper fit and functionality.

• Examples of fitters include HVAC technicians, automotive mechanics, and industrial machinery installers.

An engine converts fuel into mechanical energy through combustion, driving pistons and producing motion.

• Engines operate on the principle of converting chemical energy from fuel into mechanical energy.

• Internal combustion engines use a cycle of intake, compression, power, and exhaust.

• Examples include gasoline engines in cars and diesel engines in trucks.

• The four-stroke cycle is common, involving intake, compression, power stroke, and exhaust.

• Electric engines convert electrical ...read more

I work on various types of air conditioners including split, window, central, and portable units.

• I have experience working on split air conditioners that have an indoor and outdoor unit connected by pipes.

• I also work on window air conditioners that are installed in a window frame.

• Central air conditioners are another type I work on that cool an entire building through a duct system.

• Portable air conditioners are also in my expertise, which can be moved from room to room.

No, UPS and inverter are not interchangeable.

• UPS is designed to provide backup power for a short duration, while an inverter is designed to provide continuous power.

• UPS typically has a built-in battery, while an inverter requires an external battery.

• UPS is commonly used for computers and other electronic devices, while inverters are used for larger appliances like refrigerators and air conditioners.

Yes, I have experience and knowledge in repairing machines.

• I have a strong understanding of machine components and their functions.

• I am skilled in diagnosing and troubleshooting machine issues.

• I have experience in repairing various types of machines, such as HVAC systems, printers, or industrial equipment.

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

• I am knowledgeable in reading technical manuals and schematics to guide me in the repair process.

IC engine stands for Internal Combustion engine and EC engine stands for Electric Combustion engine.

• IC engine is a type of engine that uses fuel combustion to generate power.

• EC engine is a type of engine that uses electricity to generate power.

• IC engines are commonly used in automobiles, motorcycles, and small aircraft.

• EC engines are commonly used in electric vehicles and hybrid vehicles.

• IC engines require fuel to operate, while EC engines require a source of electricity.

• IC e...read more

I would start by checking the air filter, fuel filter, and spark plugs. Then move on to checking the fuel pressure and compression.

• Check air filter

• Check fuel filter

• Check spark plugs

• Check fuel pressure

• Check compression

A pressure compensator valve is a type of valve that maintains a constant pressure in a hydraulic system.

• It is used in hydraulic systems to maintain a constant pressure despite changes in flow rate or load.

• It works by adjusting the flow of fluid through the valve to maintain a set pressure.

• Examples include relief valves, flow control valves, and pressure reducing valves.

• It is important for ensuring the proper functioning and safety of hydraulic systems.

A capacitor stores electrical energy and releases it when needed.

• Capacitors are used in electronic circuits to filter out noise and stabilize voltage.

• They can also be used to store energy in flash cameras and defibrillators.

• Capacitors come in different types and sizes, with varying capacitance and voltage ratings.

• They are made of two conductive plates separated by a dielectric material.

• The capacitance of a capacitor depends on the surface area of the plates and the distance b...read more

BGA stands for Ball Grid Array, a type of surface-mount packaging used for integrated circuits.

• BGA stands for Ball Grid Array

• It is a type of surface-mount packaging used for integrated circuits

• BGA packages have solder balls arranged in a grid pattern on the underside of the package

Relay and contactor are electrical switches that control the flow of electricity in a circuit.

• Relays are used to switch smaller currents in a circuit, while contactors are used to switch larger currents.

• Relays are often used in control circuits to turn on or off devices, while contactors are used in power circuits to control motors and other high-power loads.

• Both relay and contactor have an electromagnetic coil that, when energized, pulls in a set of contacts to make or break...read more