Avian Infrastructure And Energy Interview Questions and Answers

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
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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
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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. Based on experience and problem faced in project site
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Q2. Previous site experience and the benifits
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Q3. Roles and responsibilities of self and the factors affecting company growth
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How to start work and company development

Q1. Questions related to my field
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Q1. Salary discussion and
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There is general aptitude test.

Q1. There is technical as well as process questions
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Q1. This is normal round with department head.
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Q1. Salary and other discussion
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