Coal India Graduate Engineer Trainee (Get) Interview Questions and Answers

I come from a supportive family. My interests lie in power plant engineering. I have knowledge of condensers, turbine blade failures, FEA courses, hazards in power plants, and safety valves in boilers.

• Family - Supportive and encouraging

• Interests - Power plant engineering

• Knowledge - Condensers, turbine blade failures, FEA courses, hazards in power plants, safety valves in boilers

• Examples - Condenser sketch, turbine blad...read more

Various types of sensors used in industries include temperature sensors, pressure sensors, level sensors, etc.

• Temperature sensors: thermocouples, resistance temperature detectors (RTDs), thermistors

• Pressure sensors: piezoresistive sensors, capacitive sensors, strain gauge sensors

• Level sensors: ultrasonic sensors, capacitive sensors, float sensors

• Flow sensors: electromagnetic flow meters, ultrasonic flow meters, thermal...read more

Instrumentation is the science of measuring and controlling physical variables such as temperature, pressure, flow, and level.

• Instrumentation involves the use of sensors, transmitters, and controllers to measure and control physical variables.

• Examples of instrumentation include temperature sensors in a furnace, pressure transmitters in a pipeline, flow meters in a chemical plant, and level sensors in a tank.

• Instrumenta...read more

Temperature and level measuring instruments operate on principles such as thermal expansion, pressure, and capacitance.

• Thermocouples measure temperature based on the voltage produced by two dissimilar metals when heated

• RTDs (Resistance Temperature Detectors) measure temperature based on the change in resistance of a metal wire with temperature

• Level sensors use principles such as buoyancy, pressure, and capacitance to m...read more

Different types of pumps and their differences.

• Centrifugal pumps: used for low viscosity fluids, high flow rates, low pressure

• Positive displacement pumps: used for high viscosity fluids, low flow rates, high pressure

• Axial flow pumps: used for high flow rates, low pressure, low viscosity fluids

• Mixed flow pumps: used for medium flow rates and pressures

• Jet pumps: used for pumping fluids with high solids content

• Differences...read more

Boilers are vessels that heat water or other fluids to generate steam or hot water for various applications.

• Fire-tube boilers: hot gases pass through tubes immersed in water

• Water-tube boilers: water flows through tubes and hot gases surround them

• Electric boilers: use electricity to generate heat instead of burning fuel

• Condensing boilers: extract additional heat from the exhaust gases to increase efficiency

• Package boile...read more

Pumps move liquids, compressors move gases.

• Pumps are used to move liquids from one place to another, while compressors are used to increase the pressure of gases.

• Pumps are typically used in industries such as water treatment, oil and gas, and chemical processing, while compressors are used in industries such as refrigeration, air conditioning, and power generation.

• Examples of pumps include centrifugal pumps, positive d...read more

Refrigeration cycles are thermodynamic cycles used in refrigeration systems to transfer heat from a low-temperature region to a high-temperature region.

• Refrigeration cycles involve four main components: compressor, condenser, expansion valve, and evaporator.

• The cycle starts with the compressor, which increases the pressure and temperature of the refrigerant gas.

• The high-pressure gas then flows into the condenser, where...read more

Creep is the gradual deformation of a material under constant stress. Failure is the inability of a material to perform its intended function. Fracture is the separation of a material into two or more pieces due to stress.

• Creep occurs over time and can lead to permanent deformation.

• Failure can occur due to various reasons such as overloading, fatigue, corrosion, etc.

• Fracture can be ductile or brittle depending on the m...read more

Hardness is resistance to indentation while toughness is resistance to fracture.

• Hardness is a measure of how easily a material can be scratched or dented.

• Toughness is a measure of how much energy a material can absorb before fracturing.

• Hardness is often measured using the Mohs scale, while toughness is measured using impact tests.

• For example, diamond is very hard but not very tough, while rubber is not very hard but ve

I am a recent graduate with a degree in engineering, eager to learn and grow in a professional setting.

• Recent graduate with a degree in engineering

• Passionate about learning and growing in a professional setting

• Strong problem-solving and analytical skills

• Experience with relevant software/tools (mention specific ones if applicable)

• Team player with excellent communication skills

My hobbies include playing musical instruments, hiking, and reading science fiction novels.

• Playing musical instruments (guitar, piano)

• Hiking in nature trails

• Reading science fiction novels (Asimov, Clarke)

I am open to any location that offers growth opportunities and a supportive work environment.

• I am willing to relocate for the right opportunity

• I prioritize career growth and learning opportunities over location

• I am flexible and adaptable to new environments

Developed a machine learning model to predict customer churn for a telecom company.

• Collected and cleaned customer data from various sources.

• Performed exploratory data analysis to identify key factors influencing customer churn.

• Built and trained a predictive model using Python and scikit-learn.

• Evaluated the model's performance using metrics like accuracy, precision, and recall.

• Presented findings and recommendations to t

Designed and implemented a smart irrigation system using IoT technology.

• Researched various sensors and microcontrollers for data collection and control.

• Developed a mobile application for remote monitoring and control of the irrigation system.

• Implemented machine learning algorithms to optimize water usage based on weather forecasts.

• Conducted field tests to validate the system's performance and efficiency.