Hindalco Industries Junior Engineer Electrical Interview Questions, Process, and Tips

Q1. Electrical Circuits Breakers?
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Q1. Basic dc motor and AC motor, transformer.
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Q1. Basic electrical maintenance questions.
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*A and B invest in a business in the ratio 3 : 2. If 5% of the total profit goes to charity and A's share is Rs. 855, the total profit is?

*Alfred buys an old scooter for Rs. 4700 and spends Rs. 800 on its repairs. If he sells the scooter for Rs. 5800, his gain percent is:

Q1. *Why Transformer Rated In kVA, Not in KW? *What are transformer losses & their types?
Ans. 
Transformers are rated in kVA because it takes into account both active power (KW) and reactive power (KVAR). Transformer losses include copper losses and iron losses.
• Transformers are rated in kVA because they handle both active power (KW) and reactive power (KVAR).

• kVA rating considers the total power (apparent power) that the transformer can handle, including the power needed for magnetizing the core.

• Transformer losse...read more
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Q2. *Mention what is the difference between generator and alternator? *Mention what are the different kind of cables used for transmissions?
Ans. 
Generator produces direct current while alternator produces alternating current. Different cables used for transmission include coaxial, twisted pair, and fiber optic cables.
• Generator produces direct current (DC) while alternator produces alternating current (AC)

• Generator uses slip rings and brushes for transmission while alternator uses a commutator

• Different cables used for transmission include coaxial, twisted pair,
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Q3. Define the principle of motors?
Ans. 
Motors operate based on the principle of electromagnetic induction, converting electrical energy into mechanical energy.
• Motors work by creating a magnetic field through the flow of current in a coil of wire.

• This magnetic field interacts with a permanent magnet or another magnetic field, causing the coil to rotate.

• The rotation of the coil is then used to drive mechanical systems, such as fans, pumps, or conveyor belts.

• D...read more
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Q1. *Why did you decide to become an electrical engineer? / What made you want to study electrical engineering
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Q2. What are the main advantages of speed control using thyristor?
Ans. 
Thyristor speed control offers precise control, energy efficiency, and reduced maintenance costs.
• Precise control of motor speed

• Improved energy efficiency by reducing power wastage

• Reduced maintenance costs due to less wear and tear on motor components

• Smooth acceleration and deceleration of motors

• Ability to control large motors with ease
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