Transrail Lighting Junior Engineer Interview Questions and Answers

Q1. What is the process of earthing?
Ans. 
Earthing is the process of connecting electrical equipment or installations to the earth to prevent electric shock and protect against electrical faults.
• Earthing involves creating a connection between the electrical system and the earth.

• It is done by burying a metal conductor, such as a copper rod, in the ground.

• The metal conductor is connected to the electrical system using a wire or cable.

• Earthing provides a path for...read more
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Q2. Which type of DGs used at your Site
Ans. 
The type of DGs used at our site are diesel generators.
• Diesel generators are commonly used as backup power sources in various industries.

• They are reliable and can provide a continuous power supply during electrical outages.

• DGs are often used in remote locations or areas with unreliable grid power.

• They require regular maintenance and fuel supply to operate efficiently.

• Examples of DGs used at our site include Cummins, Ca
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Q3. What is the difference between LT and HT line?
Ans. 
LT line refers to Low Tension line while HT line refers to High Tension line.
• LT line carries low voltage and is used for domestic and small-scale commercial purposes.

• HT line carries high voltage and is used for industrial and large-scale commercial purposes.

• LT line voltage is typically up to 440 volts, while HT line voltage is above 440 volts.

• LT lines are usually overhead lines, while HT lines can be both overhead and ...read more
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Q4. Which type of Circuit Breakers you used at Site?
Ans. 
We used different types of circuit breakers at the site depending on the specific requirements.
• We used air circuit breakers (ACBs) for low voltage applications.

• For medium voltage applications, we used vacuum circuit breakers (VCBs) or oil circuit breakers (OCBs).

• In high voltage installations, we used sulfur hexafluoride (SF6) circuit breakers.

• For specialized applications like generator protection, we used differential ...read more
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Q5. How big transformers you used at site
Ans. 
The size of transformers used at the site varied depending on the specific requirements of the project.
• Transformers used at the site were of different sizes based on the power demand of the electrical system.

• For smaller projects, transformers with a capacity of around 100 kVA were used.

• For medium-sized projects, transformers with a capacity ranging from 250 kVA to 500 kVA were used.

• For larger projects, transformers wit...read more
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Q6. Which type of Batching Plant you used at Site
Ans. 
We used a stationary type batching plant at the site.
• We used a stationary type batching plant for our construction project.

• The stationary batching plant had a higher production capacity compared to mobile plants.

• It was equipped with multiple storage bins for different types of aggregates.

• The plant had a conveyor belt system to transfer the aggregates to the mixer.

• We used this type of batching plant because it provided
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Q7. At which project you are working
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Q1. About Piping Code & Engineering Materials.
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Q2. Different types of Drawing Deliverables
Ans. 
Drawing deliverables refer to the different types of drawings that are produced during the design and construction process.
• Architectural drawings

• Structural drawings

• Mechanical drawings

• Electrical drawings

• Plumbing drawings

• Shop drawings

• As-built drawings
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Just practice basic math's and English

Q1. Your previous experience and achievements
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Electrical based aptitude

Q1. They will ask the question related to the your field
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Q2. What is tranformer
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Consists of two coils of wire, known as primary and secondary windings

• Primary winding receives electrical energy and induces a magnetic field

• Magnetic field then transfers energy to secondary winding

• Used to step up or step down voltage in electrical systems

• Commonly used in power distribution systems
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Q3. What is induction motor
Ans. 
An induction motor is a type of AC motor where power is supplied to the rotor by electromagnetic induction.
• Consists of a stator and a rotor

• Does not require any physical connection between the rotor and the stator

• Commonly used in household appliances, industrial machinery, and electric vehicles
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Q4. Types of ac motors
Ans. 
Types of AC motors include induction motors, synchronous motors, and single-phase motors.
• Induction motors: most commonly used type, work on the principle of electromagnetic induction

• Synchronous motors: maintain constant speed with the help of external DC supply

• Single-phase motors: used in household appliances, have a single-phase power supply
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Q5. Types of induction motor
Ans. 
Types of induction motors include single-phase, three-phase, squirrel cage, and wound rotor motors.
• Single-phase induction motor: used in household appliances and small industrial applications

• Three-phase induction motor: most commonly used in industrial settings for their efficiency and reliability

• Squirrel cage induction motor: simple and rugged design, widely used in various applications

• Wound rotor induction motor: all...read more
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Level of Aptitude test is average. Mainly consists of Quantitative Aptitude, English Proficiency, Logical Reasoning & Technical Questions

Q1. PLC basic knowledge
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Q2. Motors General schematic
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Q1. Why Neilsoft and why should we hire you
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