10+ Shirdi Sai Electricals Interview Questions and Answers

Yes, original certificates can be kept with the company for up to 5 years.

• Original certificates can be securely stored by the company for record-keeping purposes.

• It is common practice for companies to retain original certificates of employees for a certain period of time.

• Having original certificates on file can be useful for verification purposes or in case of audits.

• Employees should ensure that copies of their certificates are readily available for personal use if needed.

The area of a rectangle is length multiplied by width, square is side squared, ellipse is pi times major axis times minor axis, circle is pi times radius squared, and hexagon is 1.5 times apothem times perimeter.

• Rectangle: Area = length x width

• Square: Area = side x side

• Ellipse: Area = pi x major axis x minor axis

• Circle: Area = pi x radius x radius

• Hexagon: Area = 1.5 x apothem x perimeter

DTR stands for Dead Time Recovery. It is a structure used in the oil and gas industry to separate gas and liquid phases.

• DTR is typically made of steel or other corrosion-resistant materials.

• The structure is designed to handle high pressure and temperature conditions.

• Common materials used in the construction of DTR include carbon steel, stainless steel, and duplex stainless steel.

• The choice of material depends on factors such as the composition of the fluids being processed an...read more

Batch production involves producing a specific quantity of items at a time, while mass production involves continuous production of large quantities.

• Batch production is more flexible and allows for customization of products.

• Mass production is more efficient and cost-effective for producing large quantities.

• Batch production is common in industries like pharmaceuticals, bakeries, and breweries.

• Mass production is common in industries like automotive, electronics, and consumer go...read more

I had 8 subjects in my btech college.

• I had subjects like Mechanical Engineering, Electrical Engineering, Computer Science, etc.

• Each semester had different subjects based on the curriculum.

• Some common subjects included Thermodynamics, Control Systems, Data Structures, etc.

Density of Cu, Al, Mild steel, Stainless steel

• Density of Copper (Cu) is approximately 8.96 g/cm^3

• Density of Aluminum (Al) is approximately 2.70 g/cm^3

• Density of Mild Steel is approximately 7.85 g/cm^3

• Density of Stainless Steel can vary depending on the grade, but is typically around 7.9 g/cm^3

The weight of a 1mX1mX3mm MS plate can be calculated using the formula: Weight = Length(m) x Width(m) x Thickness(mm) x Density of MS (kg/m^3)

• Convert the thickness from mm to m (3mm = 0.003m)

• Density of MS is typically around 7850 kg/m^3

• Calculate the weight using the formula: Weight = 1m x 1m x 0.003m x 7850 kg/m^3

A Bucoz relay is a type of protective relay used in power systems to detect faults and isolate them to prevent damage.

• Bucoz relay is a type of protective relay used in power systems.

• It functions by detecting faults in the system and isolating them to prevent damage.

• It helps in maintaining the stability and reliability of the power system.

• Bucoz relay operates based on the principle of electromagnetic induction.

• Examples of faults detected by Bucoz relay include overcurrent, ove...read more

Pipe earthing of DTR involves using a metal pipe buried in the ground to provide a low-resistance path for fault currents.

• Metal pipe is buried vertically in the ground near the DTR

• The pipe is filled with alternate layers of charcoal and salt to improve conductivity

• A copper wire is connected to the pipe and then to the DTR for grounding purposes

Mutual induction is the process where a changing current in one coil induces a voltage in another coil.

• Mutual induction occurs when two coils are placed close to each other and the magnetic field produced by one coil induces a voltage in the other coil.

• The induced voltage in the second coil is directly proportional to the rate of change of current in the first coil.

• This phenomenon is the basis for the operation of transformers and is used in wireless power transfer technologi...read more

Flux is the flow of electric or magnetic field lines through a surface, while current is the flow of electric charge.

• Flux is a measure of the flow of a physical property through a given area.

• In electromagnetism, flux refers to the flow of electric or magnetic field lines through a surface.

• Current is the flow of electric charge through a conductor.

• Flux and current are related through Faraday's law of electromagnetic induction.

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Consists of two coils of wire, known as primary and secondary coils

• Primary coil receives electrical energy and creates a magnetic field

• Magnetic field induces a voltage in the secondary coil, transferring energy

• Used in power distribution, voltage regulation, and electrical isolation

• Examples include step-up transformers for power transmission and...read more

Transformer ratings are specified in terms of voltage, current, and power.

• Transformer ratings indicate the maximum voltage and current that can be applied to the primary and secondary windings.

• Power rating specifies the maximum power that can be transferred through the transformer.

• Ratings also include frequency, insulation class, and temperature rise.

• Examples of transformer ratings include 10 kVA, 480V/240V, 60 Hz, Class H insulation, and 150°C temperature rise.

Transformers are of two types - Step-up and Step-down transformers.

• Step-up transformers increase voltage while decreasing current

• Step-down transformers decrease voltage while increasing current

• Other types include isolation transformers, autotransformers, and instrument transformers

• Isolation transformers are used to isolate a circuit from the power source

• Autotransformers have a single winding and are used for voltage regulation

• Instrument transformers are used to measure voltag...read more