Wistron Junior Engineer Electrical Interview Questions and Answers

All the questions related to the aptitude.

Q1. Power electronics, basic electrical and electronics questions.
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Q1. Question about the project and hobbies, weakness.
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Q1. Electric general questions
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Q2. Electric breakdown
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Q3. DG opportunity, Substation maintenance
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Q4. Net workingspout
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Q5. Electric pm work
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Q1. What is the machanical rectified
Ans. 
Mechanical rectification is the process of converting alternating current (AC) to direct current (DC) using mechanical devices.
• Mechanical rectifiers typically use rotating commutators or rectifying diodes to convert AC to DC.

• Examples of mechanical rectifiers include rotary converters and motor-generator sets.

• Mechanical rectification is less common today due to the widespread use of solid-state rectifiers.

• The process of...read more
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Q2. Different between Rotating device and static devuce
Ans. 
Rotating devices have moving parts while static devices do not.
• Rotating devices have components that move in a circular motion, such as motors or turbines.

• Static devices have stationary components, like resistors or capacitors.

• Rotating devices typically require maintenance for lubrication and alignment.

• Static devices are generally more reliable and have longer lifespans.

• Examples of rotating devices include electric mot...read more
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Q1. Plc and VFd motor
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Q2. Plc and VFD motor EMS AEMS
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Q3. Convery plc VFD motor EMS AEMS
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Q1. Plc and overhead maintenance
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Q2. Hoist and crine EMS and AEMS
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Q3. Electrical maintenance assembly and spot welding
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Q1. Electrical work related any question
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Q2. Electrical work vfd transformer single line digram
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Q3. Ht panel , Lt panel
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Q1. Calble laying galnding transnational
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Q2. Moter megar any shout out problems
Ans. 
The interviewer is asking about common problems with motor meggers.
• Common problems with motor meggers include incorrect readings due to dirty or damaged insulation, faulty connections, or incorrect test settings.

• Ensure proper cleaning and maintenance of the megger to avoid inaccurate readings.

• Check for loose or damaged connections before testing to ensure accurate results.

• Verify that the test settings on the megger are...read more
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Q1. What are your salary expectations?
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Q2. Share details of your previous job.
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Q3. Tell me about yourself.
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Q1. Maintenance based question are asked for me by foxconn maintenance team
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Q1. What is resistance ?
Ans. 
Resistance is the opposition to the flow of electric current in a circuit.
• Resistance is measured in ohms (Ω).

• It is caused by the collisions of electrons with atoms in a material.

• Higher resistance leads to lower current flow in a circuit.

• Resistance can be affected by factors like material, length, and temperature.

• Example: A light bulb has resistance that converts electrical energy into light and heat.
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Q2. Current and voltage?
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Q3. What is inductance?
Ans. 
Inductance is the property of an electrical circuit that opposes changes in current flow.
• Inductance is measured in Henry (H)

• It is caused by the magnetic field generated when current flows through a conductor

• Inductors are components that are designed to have a specific inductance value

• Inductance is used in filters, transformers, and motors
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Q4. What is capacitance?
Ans. 
Capacitance is the ability of a system to store an electric charge.
• Capacitance is measured in Farads (F).

• It is the ratio of the electric charge stored on a conductor to the potential difference across it.

• Capacitors are electronic components that are designed to store and release electrical energy.

• Capacitance is used in various applications such as filtering, energy storage, and timing circuits.
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Q5. How to produce electricity?
Ans. 
Electricity can be produced through various methods such as burning fossil fuels, harnessing renewable energy sources like wind and solar, or using nuclear reactions.
• Burning fossil fuels like coal, oil, and natural gas in power plants to generate steam that drives turbines connected to generators.

• Harnessing renewable energy sources like wind turbines to convert kinetic energy into electricity.

• Using solar panels to conv...read more
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Q1. What is voltage
Ans. 
Voltage is the difference in electric potential between two points in a circuit, measured in volts.
• Voltage is the force that pushes electric current through a circuit

• It is measured in volts (V)

• Voltage is the potential difference between two points in a circuit

• Higher voltage means more potential energy available to move electrons

• Voltage can be DC (direct current) or AC (alternating current)
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Q2. What is insulator
Ans. 
An insulator is a material that does not conduct electricity, heat, or sound.
• Insulators prevent the flow of electricity, heat, or sound.

• Common insulating materials include rubber, glass, plastic, and ceramic.

• Insulators are used to protect against electric shocks, prevent heat loss, and reduce noise transmission.

• Insulators have high resistance to the flow of electrons.
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