Power Mech Projects Diploma Electrical Engineer Interview Questions and Answers

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
Ans. 
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
Ans. 
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
Ans. 
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 ?
Ans. 
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?
Ans. 
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
Ans. 
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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Non technical and technical questions

Q1. Introduction ans Family Background
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Q1. Question from your studied subject
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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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Q1. Thickness of slab. Mix grade Field test of brick. Lab test of brick. Test of cement.
Ans. 
The thickness of the slab is determined by the structural requirements and load-bearing capacity. Mix grade, field test of brick, lab test of brick, and test of cement are essential for quality control in construction.
• Thickness of slab is determined based on structural requirements and load-bearing capacity

• Mix grade of concrete is important for determining its strength and durability

• Field test of brick involves checkin...read more
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Q2. Field test of bricks
Ans. 
Field test of bricks involves checking the physical properties and quality of bricks on-site.
• Visual inspection for cracks, chips, and uniformity

• Sound test by tapping the brick to check for a clear ringing sound

• Water absorption test by immersing the brick in water to see if it absorbs water

• Dimensional measurements to ensure uniform size and shape

• Strength test by applying pressure to check for breakage
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Q3. Lab test of bricks
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Lab test of bricks involves checking for dimensions, compressive strength, water absorption, efflorescence, and soundness.
• Dimensions: Measure length, width, and height to ensure they meet standards.

• Compressive strength: Test the ability of the brick to withstand pressure.

• Water absorption: Determine the amount of water the brick can absorb.

• Efflorescence: Check for white deposits on the surface due to soluble salts.

• Sound...read more
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Q4. Lab Test of cement
Ans. 
Lab test of cement involves checking its physical and chemical properties to ensure quality and strength.
• Lab tests include checking fineness, setting time, compressive strength, and chemical composition.

• Fineness test determines the particle size of cement particles.

• Setting time test measures the time taken for cement to set.

• Compressive strength test evaluates the strength of cement mortar.

• Chemical composition test chec...read more
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Q5. Field test of cement
Ans. 
Field test of cement involves checking its physical properties and quality to ensure it meets standards.
• Field test involves checking the setting time of cement to ensure it is within specified limits.

• Checking the compressive strength of cement cubes after a certain period of curing.

• Inspecting the color and texture of the cement to ensure it is uniform and free from impurities.

• Measuring the fineness of cement particles ...read more
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Q1. Civil questions are related
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Q2. Construction related questions
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Asking about basic questions and it is a online test

Q1. Asking about welding and other basic questions on welding
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Q1. Asking about the family background
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Q1. What is your family background?
Ans. 
Including me there are 6 member in my family ,thera are 3 brother and 1 sister.
My father is business man and my mother is home meaker.
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Q2. What are your strengths and weaknesses?
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I am a good communication , multitasker and hardware
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Q3. Tell me about yourself.
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I am is uttam soni.
I here to shaktinagar bus stand market.
I am diploma holder.
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Q1. What are your strengths and weaknesses?
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Q2. Tell me about yourself.
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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