Balkrishna Industries Electrical Engineer Interview Questions and Answers

Basics of Electrical

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Q1. What are the heat producing components in this room
Ans. 
The heat producing components in this room include computers, servers, lighting fixtures, and HVAC systems.
• Computers

• Servers

• Lighting fixtures

• HVAC systems
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Q1. What is battery??
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A battery is a device that stores chemical energy and converts it into electrical energy through electrochemical reactions.
• Batteries consist of one or more electrochemical cells.

• Common types include alkaline, lithium-ion, and lead-acid batteries.

• Batteries power devices like smartphones, laptops, and electric vehicles.

• They can be rechargeable (e.g., lithium-ion) or non-rechargeable (e.g., alkaline).

• Batteries are essenti...read more
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Q2. Types of battery??
Ans. 
Batteries store and provide electrical energy, with various types suited for different applications and technologies.
• Lead-Acid: Common in vehicles, known for high surge currents.

• Lithium-Ion: Widely used in portable electronics and electric vehicles.

• Nickel-Cadmium (NiCd): Used in power tools, known for memory effect.

• Nickel-Metal Hydride (NiMH): Common in hybrid vehicles, better capacity than NiCd.

• Alkaline: Common in hou...read more
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Q1. Types of motor and it's protection
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Types of motors include AC, DC, stepper, servo, and induction. Motor protection includes overload, overvoltage, and overtemperature.
• AC motors are commonly used in household appliances and industrial machinery

• DC motors are used in electric vehicles and robotics

• Stepper motors are used in printers and CNC machines

• Servo motors are used in robotics and automation

• Induction motors are used in pumps and fans

• Overload protection...read more
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Q2. Types of transformer and it's protection
Ans. 
Transformers are of two types - step-up and step-down. Protection methods include overcurrent, overvoltage, and differential protection.
• Step-up transformers increase voltage while step-down transformers decrease voltage

• Overcurrent protection is achieved through fuses or circuit breakers

• Overvoltage protection is achieved through surge arresters or lightning arresters

• Differential protection is used to detect internal fau...read more
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Q3. What is dol starter and VFD
Ans. 
DOL starter is a direct online starter used to start and stop motors. VFD is a variable frequency drive used to control motor speed.
• DOL starter is a simple and cost-effective method of starting motors

• It provides full voltage to the motor during starting

• VFD is used to control the speed of the motor by varying the frequency of the power supplied to the motor

• It is more efficient than other methods of speed control

• VFDs are...read more
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