Medha Servo Drives Interview Questions, Process, and Tips

Normal electrical basic question asking and some regioning quetion also askin aptitude test.

Q1. Basic of transformer
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Q2. Igbt working process
Ans. 
IGBT stands for Insulated Gate Bipolar Transistor, a semiconductor device used for switching applications in power electronics.
• IGBT combines the advantages of MOSFETs and bipolar transistors

• It has three terminals: gate, collector, and emitter

• Works by controlling the voltage applied to the gate terminal to switch the device on and off

• Used in applications like motor drives, inverters, and power supplies
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Q3. Scr working process
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SCR (Silicon Controlled Rectifier) is a semiconductor device used for controlling large amounts of electrical power.
• SCR is a type of thyristor used in power control applications.

• It consists of four layers of alternating N and P-type material.

• SCR works by controlling the flow of current between the anode and cathode.

• It requires a trigger signal to turn on and start conducting.

• Once triggered, SCR will continue to conduct...read more
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Q4. Bridge rectifier working process
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A bridge rectifier is a type of full-wave rectifier that converts AC to DC by using four diodes in a bridge configuration.
• Bridge rectifier uses four diodes to convert AC to DC.

• It rectifies both halves of the AC input waveform.

• The output voltage is the absolute value of the input voltage.

• Commonly used in power supplies and battery chargers.
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Q5. Symbols of diode scr igbt thyristor
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Symbols of diode, SCR, IGBT, and thyristor are important for understanding and troubleshooting electronic circuits.
• Diode symbol: Arrow pointing towards a line representing the cathode

• SCR symbol: Three layers with a gate, anode, and cathode

• IGBT symbol: Combination of a MOSFET and a bipolar transistor

• Thyristor symbol: Similar to SCR but with an additional gate terminal
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Q1. How to reduce resistance for transformer
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To reduce resistance in a transformer, one can use low resistance materials, increase the cross-sectional area of the winding, and minimize the length of the winding.
• Use low resistance materials for the transformer windings

• Increase the cross-sectional area of the winding to reduce resistance

• Minimize the length of the winding to reduce resistance

• Ensure proper insulation to avoid any short circuits

• Maintain proper cooling
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Q1. What is Toughness. why curve use on bending path . Description about Britillness. Why CO is more dangerous than CO2.
Ans. 
Toughness is a material's ability to withstand stress without breaking. Curve is used on bending path to prevent cracking. Brittle materials lack toughness. CO is more dangerous than CO2 due to its ability to bind with hemoglobin.
• Toughness is the ability of a material to absorb energy and deform without fracturing.

• Curves are used on bending paths to distribute stress evenly and prevent cracking.

• Brittle materials lack t...read more
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Q2. Description about Ferrous metal. What is Ductility .
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Ferrous metals are those that contain iron. Ductility is the ability of a material to be stretched without breaking.
• Ferrous metals include steel and cast iron.

• Ductility is measured by the amount of deformation a material can undergo before it breaks.

• Ductile materials are often used in construction and engineering, as they can be easily shaped and formed.

• Examples of ductile metals include gold, silver, and copper.

• Ductil...read more
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Q1. What is iv coupler
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Q2. What is ashuronus motar
Ans. 
Ashuronus motar is a fictional term and does not have any known meaning or relevance in the electrical technician field.
• Ashuronus motar is not a recognized term in the electrical technician industry

• There are no known examples or applications of ashuronus motar in the field

• It is likely that the term was made up or misheard
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Totel 25 questions were asked in exam.which 20 questions were from electrical engineering and 5 questions were from math and reasoning.

Q1. From induction motor Unit of electrical terms From transducers lvdt Vfd
Ans. 
Unit of electrical terms for induction motor include voltage, current, power factor. LVDT transducers measure displacement. VFD stands for Variable Frequency Drive.
• Unit of electrical terms for induction motor: voltage, current, power factor

• LVDT transducers measure displacement

• VFD stands for Variable Frequency Drive
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Q1. Basic trade questions only
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Q1. Normal hr questions only
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