Amara Raja Group Machine Technician Interview Questions and Answers

The laws of thermodynamics describe the behavior of energy in a system. Entropy always increases in a closed system.

• The first law states that energy cannot be created or destroyed, only transferred or converted.

• The second law states that the total entropy of a closed system always increases over time.

• The third law states that as temperature approaches absolute zero, the entropy of a system approaches a minimum.

• Entropy ...read more

A group of individuals working together towards a common goal or objective.

• Teamwork and collaboration are essential for success.

• Roles and responsibilities are clearly defined within a team.

• Effective communication is crucial for a team's success.

• Trust and respect are important for building a strong team dynamic.

• Examples of teams include sports teams, project teams, and departmental teams.

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.

SCADA stands for Supervisory Control and Data Acquisition. It is a system used for monitoring and controlling industrial processes.

• SCADA systems are used in various industries such as oil and gas, water treatment, and manufacturing.

• They consist of hardware and software components that collect and analyze data from sensors and other devices.

• SCADA systems allow operators to remotely monitor and control processes, making ...read more

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 updat...read more

BS4 and BS6 are emission norms for vehicles, with BS6 being more stringent and environmentally friendly.

• BS4 stands for Bharat Stage 4 and BS6 stands for Bharat Stage 6.

• BS4 emission norms were implemented in India in 2017, while BS6 norms were implemented in 2020.

• BS6 vehicles emit lower levels of harmful pollutants like nitrogen oxides and particulate matter compared to BS4 vehicles.

• BS6 compliant vehicles require the us...read more