Sedemac Mechatronics Electronic Technician Interview Questions, Process, and Tips

I grew up in a small town, went to college, and pursued a career in tech.

• Born and raised in a small town

• Attended college and earned a degree in Computer Science

• Started working in tech as a software engineer

• Moved to a big city for better job opportunities

• Continued to advance my career and gain new skills

Heat transfer occurs through conduction, convection, and radiation.

• Conduction is the transfer of heat through a material without any movement of the material itself.

• Convection is the transfer of heat through the movement of fluids or gases.

• Radiation is the transfer of heat through electromagnetic waves.

• Examples include touching a hot stove (conduction), boiling water (convection), and feeling the warmth of the sun (rad

Reduce risk of global warming from R12 in air-conditioners

• Use alternative refrigerants like R134a or R290

• Ensure proper disposal of old refrigerants

• Regular maintenance and leak detection to prevent emissions

• Encourage energy-efficient ACs to reduce overall emissions

• Promote use of natural refrigerants like CO2 or ammonia

• Implement regulations and policies to phase out harmful refrigerants

• Invest in research and development

The Simplex method is used to solve linear programming problems with multiple variables and constraints.

• Used in optimization problems

• Used to find the optimal solution

• Used when there are multiple variables and constraints

• Examples include production planning and resource allocation

Artificial Intelligence (AI) sector is expected to boom in the next five years.

• AI is being integrated into various industries such as healthcare, finance, and transportation.

• The global AI market is expected to reach $267 billion by 2027.

• AI is being used for predictive analytics, natural language processing, and image recognition.

• Companies such as Google, Amazon, and Microsoft are investing heavily in AI research and de

A circuit breaker is an electrical switch that automatically interrupts the flow of current when it exceeds a certain limit.

• It is used to protect electrical circuits from damage caused by overloading or short circuits.

• It works by detecting the excess current and tripping the switch to break the circuit.

• It can be reset manually or automatically depending on the type of circuit breaker.

• Examples include thermal circuit br...read more

A contactor is an electrical switch used for switching an electrical circuit on or off.

• It is used to control electric motors, lighting, heating, and other electrical loads.

• It consists of a coil, contacts, and an enclosure.

• The coil generates a magnetic field that pulls the contacts together to close the circuit.

• Examples include HVAC systems, elevators, and industrial machinery.

• Contactor ratings are based on the amount o...read more

MCB stands for Miniature Circuit Breaker. It is an electrical switch that automatically shuts off the electrical circuit during an overload or short circuit.

• MCB is a type of circuit breaker that is commonly used in residential and commercial buildings.

• It is designed to protect electrical circuits from damage caused by overloading or short circuits.

• MCBs are available in different current ratings and can be easily replac...read more

A motor is a device that converts electrical energy into mechanical energy to produce motion.

• Motors are used in various applications such as electric vehicles, industrial machinery, and household appliances.

• There are different types of motors such as DC motors, AC motors, stepper motors, and servo motors.

• The basic principle of a motor is the interaction between a magnetic field and an electric current.

• Examples of motor...read more

A current transformer is a device that measures the current flowing in a circuit by producing a proportional current in its secondary winding.

• Consists of a primary winding and a secondary winding

• Primary winding is connected in series with the circuit carrying the current to be measured

• Secondary winding is connected to a measuring instrument or protective relay

• Produces a current in the secondary winding that is proporti...read more

Power factor is a measure of how effectively electrical power is being used in a circuit.

• Power factor is the ratio of real power (in watts) to apparent power (in volt-amperes).

• It indicates the efficiency of electrical power consumption in a circuit.

• A power factor of 1 means all the power is being used effectively, while a power factor less than 1 indicates wastage of power.

• Inductive loads like motors and transformers h...read more

A motor is an electrical device that converts electrical energy into mechanical energy.

• Motors are used in a variety of applications, from powering industrial machinery to driving household appliances.

• There are different types of motors, including AC motors, DC motors, and stepper motors.

• Motors can be controlled using various methods, such as variable frequency drives and soft starters.

• Proper maintenance and inspection ...read more

A star delta starter is used to reduce the starting current of a motor.

• The motor is initially connected in star configuration to reduce the voltage across each winding.

• After a set time, the motor is switched to delta configuration for normal operation.

• The control diagram includes a timer, contactors, and overload protection.

• The timer delays the switching from star to delta configuration.

• The contactors are used to switc...read more

DOL starter is used in single-phase induction motors and small three-phase motors.

• DOL starter stands for Direct-On-Line starter.

• It is used to start and stop the motor directly without any intermediate control.

• It is commonly used in single-phase induction motors and small three-phase motors.

• DOL starter provides full voltage to the motor during starting, which can cause high starting current.

• It consists of a contactor, t...read more

The resistive load equation is used to calculate the power consumed by a resistive load.

• The equation is P = V^2/R, where P is power, V is voltage, and R is resistance.

• This equation is used in electrical engineering to determine the power consumption of resistive loads such as heaters and incandescent light bulbs.

• The equation can also be rearranged to solve for voltage or resistance, depending on the information given.

• I...read more

Asynchronous motors are used for various purposes due to their simple design and low cost.

• Asynchronous motors are commonly used in industrial applications such as pumps, fans, and compressors.

• They are also used in household appliances like washing machines and refrigerators.

• Asynchronous motors are preferred for their low maintenance and high reliability.

• They are also used in electric vehicles and hybrid cars.

• Asynchrono...read more

Transformers are classified based on their construction, purpose, and voltage level.

• Based on construction: core type, shell type, and Berry type

• Based on purpose: power transformer, distribution transformer, isolation transformer, autotransformer, etc.

• Based on voltage level: step-up transformer, step-down transformer, and isolation transformer

• Other classifications: single-phase transformer, three-phase transformer, and ...read more

India has a total installed capacity of over 370 GW as of 2021.

• India's power generation capacity has been growing rapidly in recent years

• The country has set a target of achieving 450 GW of renewable energy capacity by 2030

• India is one of the world's largest producers of renewable energy, with a capacity of over 100 GW

• Coal still accounts for a significant portion of India's power generation, but the government is workin

Chopper circuits are used to convert a fixed DC voltage to a variable DC voltage.

• Chopper circuits are also known as DC-DC converters.

• They are used in applications such as battery charging, motor control, and renewable energy systems.

• Chopper circuits use high-frequency switching to control the output voltage.

• Examples of chopper circuits include buck converters, boost converters, and buck-boost converters.