VVDN Technologies Electrical Engineer Interview Questions, Process, and Tips

Am Rupesh Kumar am now staying in delahi from Bihar araria

Q1. What is the series motor
Ans. 
A series motor is a type of electric motor where the field windings are connected in series with the armature windings.
• The torque of a series motor is proportional to the square of the current flowing through it.

• Series motors are used in applications where high starting torque is required, such as in electric trains and cranes.

• They are not suitable for applications where constant speed is required, as their speed varie...read more
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Q2. What are the different between universal motor and series motor?
Ans. 
Universal motors are used for AC and DC power while series motors are used for DC power only.
• Universal motors have a high starting torque and can operate at high speeds, making them suitable for appliances like vacuum cleaners and power tools.

• Series motors have a high starting torque and can operate at low speeds, making them suitable for applications like electric trains and cranes.

• Universal motors have brushes that w...read more
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Q3. How many types of transformer
Ans. 
There are several types of transformers used in electrical engineering.
• Power transformers

• Distribution transformers

• Instrument transformers

• Auto transformers

• Isolation transformers

• Step-up and step-down transformers

• Three-phase transformers

• Toroidal transformers

• Ferrite core transformers

• Air core transformers
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Q4. Explain of step down transformer
Ans. 
A step-down transformer is a type of transformer that reduces the voltage level from primary to secondary winding.
• It has more turns in the primary winding than in the secondary winding

• It is used to step down the voltage level in power transmission and distribution

• It is commonly used in electronic devices to convert high voltage to low voltage

• Examples include power adapters for laptops and mobile phones
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Q5. What's the compound motor
Ans. 
A compound motor is a type of electric motor that combines the features of a series motor and a shunt motor.
• It has both a series field winding and a shunt field winding

• It provides high starting torque and good speed regulation

• It is commonly used in applications such as elevators, cranes, and hoists
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