Suzlon Group
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I applied via Walk-in and was interviewed before Nov 2022. There were 2 interview rounds.
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
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...
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
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...
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
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...
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
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...
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...
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 ...
I applied via Walk-in and was interviewed in Apr 2022. There were 3 interview rounds.
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I applied via Naukri.com and was interviewed in Sep 2020. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in Dec 2020. There were 4 interview rounds.
VCB, SF6, CT, PT, LA are all electrical equipment used in power systems.
VCB stands for Vacuum Circuit Breaker and is used for switching and protection of electrical power systems.
SF6 is a gas used as an insulating medium in high voltage electrical equipment such as circuit breakers, switchgear, and transformers.
CT stands for Current Transformer and is used to measure electrical current in power systems.
PT stands for Po...
Copper and aluminum are commonly used conductors in transmission.
Copper is an excellent conductor due to its high electrical conductivity.
Aluminum is also widely used as it is lightweight and cost-effective.
Other conductors like silver and gold are rarely used due to their high cost.
Copper-clad steel conductors are used in specific applications where strength is required.
Different types of tests related to transformers include routine tests, type tests, and special tests.
Routine tests are performed on every transformer and include measurement of winding resistance, insulation resistance, and voltage ratio.
Type tests are performed on a sample transformer to verify its design and include temperature rise test, impulse test, and short-circuit test.
Special tests are performed on transforme...
Different types of faults refer to the various abnormalities that can occur in an electrical system.
Short circuit fault
Open circuit fault
Ground fault
Overvoltage fault
Undervoltage fault
Overcurrent fault
Undercurrent fault
Relays are switches that open and close circuits electromechanically or electronically. There are various types of relays.
Electromechanical relays
Solid-state relays
Reed relays
Polarized relays
Time-delay relays
Overload protection relays
Mercury-wetted relays
Latching relays
Machine tool relays
Thermal relays
I appeared for an interview in Mar 2017.
A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.
Transformers work on the principle of electromagnetic induction
They have two coils, primary and secondary, wound around a common magnetic core
When an alternating current flows through the primary coil, it creates a magnetic field which induces a voltage in the secondary coil
The voltage in...
I appeared for an interview in Sep 2024, where I was asked the following questions.
I applied via Referral and was interviewed in Feb 2021. There were 4 interview rounds.
Switch gears are electrical devices used to control, protect and isolate electrical equipment.
Switch gears are used in power distribution systems to control the flow of electricity.
They protect electrical equipment from damage caused by overloads, short circuits, and other faults.
Switch gears can be classified into low voltage and high voltage depending on the voltage level they operate at.
Examples of switch gears incl...
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