Larsen & Toubro Limited Diploma Engineer Trainee - DET Interview Questions and Answers

Q1. Construction related
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Q2. Finishing related.
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Q1. What are type 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 transformers

• Step-down transformers
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Q2. How many earthing required for commencing a transformer
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The number of earthing required for commencing a transformer depends on the type and size of the transformer.
• The number of earthing required for a transformer depends on its rating and the local electrical regulations.

• In general, a single earthing electrode is sufficient for small transformers with ratings up to a few hundred kVA.

• For larger transformers, multiple earthing electrodes may be required to ensure proper gro...read more
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Q3. What is silika gel
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Silica gel is a desiccant commonly used to absorb moisture and prevent the growth of mold and mildew.
• Silica gel is a porous form of silicon dioxide.

• It is often found in small packets or sachets.

• It is used in various industries such as electronics, pharmaceuticals, and food packaging.

• Silica gel can absorb moisture up to 40% of its own weight.

• It is non-toxic and chemically inert.

• Common uses include preserving the freshne...read more
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Q4. What is vcb? Whwere it is installed
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VCB stands for Vacuum Circuit Breaker. It is a type of electrical switchgear used for protecting electrical circuits from overloads and short circuits.
• VCB uses vacuum as the arc quenching medium instead of oil or air.

• It is installed in high voltage power systems, such as substations and power plants.

• VCBs are commonly used in distribution networks, generator circuits, and transformer circuits.

• They provide reliable and e...read more
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Q5. What is the acceptable current for human ?
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The acceptable current for humans depends on various factors such as duration, frequency, and pathway.
• The acceptable current for humans is typically below 1 mA for low-frequency currents.

• For high-frequency currents, the acceptable current is lower, usually below 0.1 mA.

• The duration of exposure also plays a significant role in determining the acceptable current.

• The pathway of the current through the body, such as hand-t...read more
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Q6. What is alternator?
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An alternator is an electrical machine that converts mechanical energy into electrical energy.
• An alternator is commonly used in vehicles to charge the battery and power the electrical system.

• It operates on the principle of electromagnetic induction.

• Alternators produce alternating current (AC) which is then converted to direct current (DC) using rectifiers.

• They consist of a rotor, stator, and diodes.

• The rotor is driven ...read more
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Q7. What is ct transformer
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A CT transformer, also known as a current transformer, is an electrical device used to measure alternating current (AC) by stepping down the current to a lower value.
• CT transformers are commonly used in power systems to measure high currents without directly connecting measuring instruments to the circuit.

• They consist of a primary winding, which carries the current to be measured, and a secondary winding, which is conn...read more
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Q1. About your self
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Q2. About previous project
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Some basic aptitude belongs to maths and engineering

Discuss on environment topic with my batch mate

Q1. Common question related to our department
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Q2. Related to our branch
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Q3. Related to our trade
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General Reasoning, Mathematics, height and distance, English grammar etc.

A lattest current topic

Q1. Technically what we study, in engineering.
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Q2. Estimation of column, IS codes, Drawing Reading etc.
Ans. 
Estimation of column, IS codes, Drawing Reading etc.
• Estimation of column involves calculating the required amount of materials and labor for construction.

• IS codes refer to the Indian Standards codes that provide guidelines for construction and engineering practices.

• Drawing reading involves interpreting technical drawings and blueprints to understand the design and specifications of a structure.

• Knowledge of these concep...read more
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Q1. Tell me about yourself.
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Q2. What is your family background?
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Q1. Self Introduction.
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Q2. My job work experience in this field.
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Q1. Basic information.
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Q1. Amy questions hr I am always ready
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My study in my filed

Q1. DG other questions
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Q2. Transformer other questions
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Q3. Relays othee questions
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Q4. Circuit breaker other questions
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Q5. Power transformer
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Q6. Motors other questions
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Q7. Grid station other
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Q8. Rectifier Transformer other questions
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Q9. Distribution transformer , crrrent transformer potential Transformer power plant
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Rectifier Generator protection