GMR Energy Manager Mechanical Maintenance Interview Questions, Process, and Tips

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Q1. Explain the type of gear
Ans. 
Gears are mechanical devices that transmit motion and power between rotating shafts.
• Gears can be classified into various types such as spur gears, helical gears, bevel gears, worm gears, etc.

• Spur gears have straight teeth and are the most common type of gear used.

• Helical gears have angled teeth for smoother and quieter operation.

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

• Worm gears consist of a...read more
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Q2. What is mechanics ?
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Mechanics is the branch of physics that deals with the behavior of physical bodies when subjected to forces or displacements.
• Mechanics involves studying the motion, forces, and energy of objects.

• It is divided into two main branches: statics (study of objects at rest) and dynamics (study of objects in motion).

• Examples include analyzing the forces acting on a bridge to ensure its stability, or calculating the speed of a
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Q3. What is formula of Watar
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There is no formula for 'Watar' as it is not a recognized term in engineering.
• There is no known formula or concept related to 'Watar' in the field of mechanical engineering.

• It is possible that the term 'Watar' was misspelled or misunderstood in the question.

• It is important to clarify the term or ask for more information to provide an accurate answer.
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Q4. What formula is H2O
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H2O is the chemical formula for water, consisting of two hydrogen atoms and one oxygen atom.
• H2O represents one molecule of water

• It consists of two hydrogen atoms bonded to one oxygen atom

• The molecular weight of water is 18.01528 g/mol
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Q5. 1. gulf year,helical gear ,worm gear, spur gear,miter gear 2. a branch of physics and mathematics that deals with the relation between the forces acting on the body and the motion of the body 3. Hydrogen o...read more
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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
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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
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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. 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
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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. Trubalshuting of all hydraulic releted
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Q2. Hand sketch drawing and measurement tools proper handling and cylinder orhauling and proper assembly
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Q3. Hydraulic cylinder maintenance
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Q4. Asking All questions to hydraulics releted
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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. Basic about hydraulic system
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Q2. Difference between pressure relief and pressure reducing valve
Ans. 
Pressure relief valves protect systems from overpressure, while pressure reducing valves reduce pressure to a desired level.
• Pressure relief valves open to release excess pressure and prevent damage to the system

• Pressure reducing valves maintain a constant downstream pressure by reducing the incoming pressure

• Pressure relief valves are typically set to open at a higher pressure than the system's operating pressure

• Pressur...read more
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Q3. What is hydraulic machine
Ans. 
Hydraulic machines use fluid power to perform mechanical tasks.
• Hydraulic machines use a liquid, usually oil, to transmit power.

• They are used in a variety of applications, including construction equipment, manufacturing machinery, and transportation systems.

• Examples include hydraulic presses, cranes, and excavators.

• Hydraulic machines are known for their high power density and ability to generate large forces.

• They requir...read more
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