Adani Power Mechanical Maintenance Engineer Interview Questions and Answers

General aptitude test follwed by a technical round. Questions were asked from different online forums/sites. Lengthy to be solved at own. it was a CBT.

GD was conducted in batches of 10 to 15. Firstly all members were given 3 choices of topics for GD. GD topics were very general. Then the selected topic was reserved for the GD. it was more like a debate. Everyone raised volume to ensure that they are heard more. Those who spoke more irrespective of the quality of arguments, finally aced the GD round.

Q1. General information regarding my educational background and family background. HR raised questions entirely from my resume
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Q2. Tell me about yourself
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Q3. What does your parents/siblings do
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Q4. Tell me about the internship
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Q5. Explain your project during internship
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Q6. Would you be comfortable with pan india location
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Q7. Tell me about your city
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Q1. What is your favorite subject
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Q2. Why is ........... your favorite subject
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Q3. Do you know how a thermal power plant works
Ans. 
A thermal power plant generates electricity by converting heat energy into electrical energy through the use of steam turbines.
• Thermal power plants burn fossil fuels such as coal, natural gas, or oil to heat water and produce steam.

• The steam is then used to drive a turbine connected to a generator, which produces electricity.

• The waste heat from the turbine is usually released into the environment through cooling towers...read more
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Q4. Explain working of thermal power plant
Ans. 
Thermal power plants generate electricity by converting heat energy into electrical energy.
• Fuel (coal, oil, gas) is burned to produce heat

• Heat is used to boil water and produce steam

• Steam drives a turbine connected to a generator, producing electricity

• Cooling water is used to condense the steam back into water for reuse

• Electricity is then transmitted through power lines to consumers
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Q5. Explain rankine cycle
Ans. 
Rankine cycle is a thermodynamic cycle used in steam power plants to generate electricity.
• Rankine cycle involves four processes: compression, heating, expansion, and cooling.

• Steam is compressed in a pump, heated in a boiler, expanded in a turbine, and cooled in a condenser.

• The cycle aims to maximize the efficiency of converting heat into mechanical work.

• It is commonly used in power plants to generate electricity.

• Effici...read more
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Q6. How is electricity produced in generator? Which law explain
Ans. 
Electricity is produced in a generator through electromagnetic induction. Faraday's law of electromagnetic induction explains this process.
• Electricity is produced in a generator through the process of electromagnetic induction.

• When a conductor is moved through a magnetic field, or a magnetic field is moved around a conductor, it creates an electric current.

• This current is then collected and converted into usable electr...read more
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Q7. Why you want to be in jsw energy
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Q1. Types of gearbox
Ans. 
Types of gearboxes include spur, helical, bevel, worm, planetary, and cycloidal.
• Spur gearbox: simple and efficient, used in low-speed applications

• Helical gearbox: smoother operation, higher load capacity

• Bevel gearbox: used for right angle drives

• Worm gearbox: high reduction ratios, self-locking feature

• Planetary gearbox: compact design, high torque transmission

• Cycloidal gearbox: high shock load capacity, low backlash
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Q2. What is difference between tensioning and torqueing
Ans. 
Tensioning involves stretching a fastener to a specific load, while torqueing involves tightening a fastener to a specific torque value.
• Tensioning is typically used for critical applications where precise load control is required.

• Torqueing is more commonly used in general applications where a specific torque value is sufficient.

• Tensioning is often used in applications like bolted joints in bridges or aircraft structure...read more
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Q3. What is the main reason of gearbox failure
Ans. 
The main reason for gearbox failure is lack of lubrication, leading to increased friction and wear.
• Lack of proper lubrication causing increased friction

• Contamination of lubricant with dirt or debris

• Overloading the gearbox beyond its capacity

• Improper maintenance and servicing

• Manufacturing defects or poor quality materials

• Incorrect alignment of gears
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Q4. Difference between two stroke and four stroke engine
Ans. 
Two stroke engines have power strokes every revolution, while four stroke engines have power strokes every other revolution.
• Two stroke engines have a simpler design with fewer moving parts compared to four stroke engines

• Two stroke engines require a fuel-oil mixture for lubrication, while four stroke engines have a separate oil reservoir

• Two stroke engines produce more pollution due to incomplete combustion, while four s...read more
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Q5. How WTG generate electricity
Ans. 
Wind Turbine Generators (WTG) generate electricity through the conversion of wind energy into mechanical energy and then into electrical energy.
• Wind turns the blades of the turbine

• Blades are connected to a rotor

• Rotor spins a generator to produce electricity

• Electricity is then sent to a transformer for distribution

• Example: Vestas V164-9.5 MW wind turbine
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Q6. Why we use fluid coupling
Ans. 
Fluid couplings are used to transmit power from one shaft to another without direct physical contact, allowing for smooth start-ups and overload protection.
• Fluid couplings help in gradual acceleration of heavy machinery, reducing stress on the equipment

• They provide overload protection by slipping when the torque exceeds a certain limit

• Fluid couplings dampen torsional vibrations, reducing wear and tear on the machinery

• T...read more
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Q7. Why gear box use
Ans. 
Gear boxes are used to transmit power from one component to another while changing the speed and torque of the output.
• Gear boxes allow for speed and torque conversion between input and output shafts

• They provide mechanical advantage by increasing or decreasing speed and torque

• Used in various applications such as automobiles, industrial machinery, and power transmission systems
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Q8. Did you know about generator alignment
Ans. 
Yes, generator alignment is crucial for efficient operation and preventing damage.
• Generator alignment ensures that the rotating parts are properly positioned to prevent vibration and wear

• Improper alignment can lead to increased maintenance costs and reduced efficiency

• Alignment methods include laser alignment, dial indicators, and alignment jigs

• Regular alignment checks should be performed to ensure optimal performance

• Ex...read more
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Q9. Which gear is used in gearbox
Ans. 
Various types of gears can be used in a gearbox depending on the application, such as spur gears, helical gears, bevel gears, and worm gears.
• Spur gears are commonly used in applications where simplicity and cost-effectiveness are important.

• Helical gears are used when smooth and quiet operation is required.

• Bevel gears are used to transmit motion between intersecting shafts.

• Worm gears are used for high reduction ratios a...read more
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Q10. Why aviation lamp is use in wtg
Ans. 
Aviation lamps are used in wind turbine generators (WTG) for aircraft safety and navigation purposes.
• Aviation lamps help to make the wind turbine visible to aircrafts, reducing the risk of collisions.

• They also aid in navigation by marking the location of the wind turbine for pilots.

• The use of aviation lamps is a regulatory requirement to ensure air traffic safety around wind turbines.

• Different colors of aviation lamps ...read more
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Q1. Can you explain material handling process using belt conveyor system? what is the width & type of your belt conveyor?
Ans. 
Material handling process using belt conveyor system involves transporting materials efficiently. The width and type of belt conveyor depend on the specific application.
• Belt conveyor system is used to transport materials from one location to another in a production facility or warehouse.

• The width of the belt conveyor depends on the size and weight of the materials being transported. It can range from a few inches to se...read more
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Q2. Hydraulics & pneumatic questions about packaging system, load cell , optical sensors, fire fighting, OHS (they give a lot of importance to safety- read OHS,PTW system, W@H, Hot work safety, Fire Fighting, ...read more
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Q1. Simple intro & other info, casual
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Q1. Technical case study
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Q2. Group discussion HR case study
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Q1. What is tharmal power plant
Ans. 
A thermal power plant is a facility that converts heat energy into electrical power.
• Thermal power plants use fossil fuels, nuclear energy, or renewable sources to generate heat.

• The heat is used to produce steam, which drives a turbine connected to a generator.

• The generator converts mechanical energy into electrical energy.

• Common types of thermal power plants include coal-fired, gas-fired, and nuclear power plants.

• Examp...read more
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Q2. Tharmal power plant efficiency how to work
Ans. 
Thermal power plant efficiency is the ratio of energy output to energy input.
• Efficiency can be improved by using high-quality fuel and improving the combustion process.

• Regular maintenance of equipment and proper insulation can also improve efficiency.

• Cogeneration, where waste heat is used for other purposes, can increase efficiency.

• Efficiency can be calculated using the formula: Efficiency = Energy output / Energy inpu...read more
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Q1. Can not disclose interview question as per company norms
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Q1. Interview on Previous experience
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Q1. Asking about yourself your past experience knowledge
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