OPTCL Diploma Electrical Engineer Interview Questions and Answers

There firstly was conducted aptitude test in this test we got 25 techanical question, 10 general English language questions and 10 general aptitude questions.

Q1. What is the use of star delta connection in electrical ?
Ans. 
Star delta connection is used to start high power motors with reduced starting current and torque.
• Reduces starting current and torque

• Used for high power motors

• Improves motor efficiency

• Reduces voltage drop during starting

• Reduces stress on motor windings

• Example: Starting a large induction motor in an industrial setting
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Q2. What Kinds of Cables Are Used for Power Transmissions?
Ans. 
Different types of cables are used for power transmission, including overhead lines, underground cables, and submarine cables.
• Overhead lines are commonly used for power transmission over long distances.

• Underground cables are used in urban areas where overhead lines are not feasible.

• Submarine cables are used for power transmission between islands or across bodies of water.

• Different types of cables, such as aluminum cabl...read more
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Q3. Mention what is the difference between generator and alternator ?
Ans. 
Generators and alternators are both electrical machines that convert mechanical energy into electrical energy, but they differ in their construction and working principles.
• Generators produce direct current (DC) while alternators produce alternating current (AC).

• Generators use a commutator and brushes to convert mechanical energy into electrical energy, while alternators use slip rings and brushes.

• Generators are typical...read more
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We got a topic for group discussion , " what is profit and loss to remove article 370 from kasmir " .

Q1. What is your interest
Ans. 
My interest lies in the field of electrical engineering, specifically in designing and implementing innovative solutions.
• Passionate about exploring new technologies and advancements in electrical engineering

• Enjoys problem-solving and finding efficient solutions to complex electrical engineering challenges

• Interested in designing and optimizing electrical systems for maximum efficiency and sustainability

• Fascinated by the...read more
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Q2. Why we will select you for our company
Ans. 
I have a strong educational background and relevant experience in the electrical engineering field.
• I have completed a diploma in electrical engineering, which has provided me with a solid foundation in the subject.

• I have gained practical experience through internships and projects, where I have successfully applied my knowledge to solve electrical engineering problems.

• I have a strong understanding of electrical systems...read more
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Q1. Solar field and transformer and other solar
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Q2. Total solar field nollage
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Q1. Wind turbine work
Ans. 
Wind turbines convert wind energy into electricity through the use of blades that spin a generator.
• Wind turbines use the kinetic energy of the wind to generate electricity

• Blades on the turbine spin a generator to produce electricity

• Wind speed and direction are important factors for efficient turbine operation
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Q2. Transformer work
Ans. 
Transformers are electrical devices that transfer electrical energy between two or more circuits through electromagnetic induction.
• Transformers work on the principle of electromagnetic induction

• They consist of two coils of wire, known as the primary and secondary windings

• The primary winding is connected to a power source, creating a magnetic field

• This magnetic field induces a voltage in the secondary winding, transferr...read more
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My aptitude test should be taken from Math Science.

Q1. Electrical engineering
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Q2. What is a transformer?
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Q3. How does a thermal power plant work ?
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Q4. What is the difference between high voltage transmission line and low voltage transmission line?
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Q1. Rotary and static equipment
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Q2. Pump and vessel experience
Ans. 
I have experience working with pumps and vessels in various projects during my diploma in Mechanical Engineering.
• I have hands-on experience in designing, installing, and maintaining pumps and vessels for different industrial applications.

• I am familiar with different types of pumps such as centrifugal pumps, reciprocating pumps, and gear pumps.

• I have worked on sizing and selecting pumps based on the flow rate, head, and...read more
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Q3. Rotary and static equipment pump gearbox
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Q4. Exchanger and colme
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Q5. Vesale experience
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Q1. Drawing basis details
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Q2. Drawing reading and material quantity
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Medium Reasoning and Math. English

Q1. Electro magnetic induction law. Kirchhoaf law. Low voltage & High voltage circuit breaker. Kw & Kva difference. Power factor. Reactive power & apparent power. Isolatar. 33/11 kva substation. Bridge rectifi...read more
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There was written exam in two parts
1st was aptitude and reasoning and some English language grammar.

Q1. 2nd round was totally technical based of your core branch.
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