Electrical Designer

30+ Electrical Designer Interview Questions and Answers

Updated 3 Aug 2024

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Q1. What is the cable tray layout and how do you cable tray design, what is the input requirement, Trench layout and what is the input requirement,

Ans.

Cable tray layout involves designing and arranging cable trays for efficient cable management.

  • Input requirements include cable type, size, weight, and routing

  • Trench layout input requirements include trench dimensions and depth

  • Design should consider cable spacing, support, and accessibility

  • Proper grounding and bonding should also be considered

Q2. What is panel?Have you worked in panel layout?

Ans.

A panel is an enclosure that houses electrical components and controls. Yes, I have worked in panel layout.

  • Panels are used to protect electrical equipment from damage and to prevent electrical hazards.

  • Panel layout involves designing the arrangement of components within the panel.

  • Factors to consider in panel layout include ease of access, cable routing, and heat dissipation.

  • Examples of components that may be included in a panel are circuit breakers, relays, and switches.

Q3. 2.How creat a block? Proceasure of block editing?

Ans.

To create a block in electrical design, follow these steps for block editing.

  • Open the schematic editor and draw the desired shape for the block

  • Select the shape and right-click to access the 'Create Block' option

  • Name the block and add any necessary attributes

  • Save the block to the library for future use

  • To edit the block, select it and right-click to access the 'Edit Block' option

  • Make the desired changes and save the updated block to the library

Q4. 1.Command of shifting a drawing from one window to another?

Ans.

To shift a drawing from one window to another, use the MOVE command.

  • Type MOVE in the command line

  • Select the drawing to be moved

  • Specify the base point of the drawing

  • Select the destination window

  • Specify the insertion point in the destination window

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Q5. What is the reference detais for tray layouts

Ans.

Reference details for tray layouts include industry standards, project specifications, and manufacturer recommendations.

  • Industry standards such as NEMA VE 1 and NEC Article 392 provide guidelines for tray layouts

  • Project specifications outline specific requirements for tray layouts based on the project's needs

  • Manufacturer recommendations provide information on the appropriate tray size, material, and installation methods

  • Considerations such as cable size, weight, and routing al...read more

Q6. Support and installation for lighting fixture

Ans.

Providing support and installation for lighting fixtures involves understanding electrical requirements, proper placement, and ensuring safety.

  • Ensure proper electrical wiring and connections are in place

  • Consider the placement of fixtures for optimal lighting

  • Follow safety guidelines and regulations during installation

  • Provide support for any troubleshooting or maintenance issues

  • Offer recommendations for energy-efficient lighting options

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Q7. Difference between CB & switchgear?

Ans.

CB is a device that interrupts the flow of current, while switchgear is a combination of switches, fuses, and circuit breakers used to control and protect electrical equipment.

  • CB is a single device, while switchgear is a combination of devices.

  • CB is used to interrupt the flow of current in case of overload or short circuit, while switchgear is used to control and protect electrical equipment.

  • Switchgear can be used for low voltage or high voltage applications, while CB is typi...read more

Q8. What is first angle and thard angle projection

Ans.

First angle and third angle projection are two methods used in technical drawing to represent a 3D object on a 2D surface.

  • First angle projection is commonly used in Europe and Asia, where the object is imagined to be in the first quadrant of a Cartesian coordinate system.

  • Third angle projection is commonly used in North America, where the object is imagined to be in the third quadrant of a Cartesian coordinate system.

  • In first angle projection, the top view is placed above the ...read more

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Q9. Standard size and length of cable tray

Ans.

Standard size and length of cable tray varies depending on the application and requirements.

  • Standard sizes for cable trays are typically 4, 6, 8, 12, 18, and 24 inches wide.

  • Standard lengths for cable trays are usually 10 or 12 feet long.

  • The size and length of cable tray needed will depend on the amount and type of cables being supported.

  • Consider factors such as weight capacity, corrosion resistance, and environmental conditions when selecting cable tray size and length.

Q10. Transformers, and generator alternator working principle

Ans.

Transformers and generator alternators are devices that convert electrical energy from one form to another.

  • Transformers work on the principle of electromagnetic induction, where a changing current in one coil induces a voltage in another coil.

  • They are used to step up or step down voltage levels in electrical power transmission and distribution systems.

  • Generator alternators, also known as synchronous generators, convert mechanical energy into electrical energy through the prin...read more

Q11. Different type of earthing gistrip

Ans.

Different types of earthing gistrips include plate earthing, pipe earthing, and rod earthing.

  • Plate earthing involves burying a copper plate in the ground.

  • Pipe earthing uses a galvanized iron pipe filled with charcoal and salt to improve conductivity.

  • Rod earthing utilizes a copper rod driven into the ground to provide a low-resistance path for fault currents.

Q12. Working procedure of Dialux evo

Ans.

Dialux evo is a lighting design software used by electrical designers to create professional lighting designs.

  • Start by creating a new project and selecting the appropriate room type

  • Add the necessary objects such as walls, windows, doors, and furniture

  • Place light sources like lamps and luminaires in the design

  • Set up the lighting parameters such as intensity, color, and direction

  • Run calculations to analyze the lighting performance and make adjustments as needed

  • Generate reports ...read more

Q13. Which code is going to use for usa

Ans.

The National Electrical Code (NEC) is used in the USA.

  • The NEC is updated every three years.

  • It is published by the National Fire Protection Association (NFPA).

  • The NEC covers electrical wiring and installations in buildings and structures.

  • It is adopted by most states and local jurisdictions in the USA.

  • The current version of the NEC is the 2020 edition.

Q14. What is the meaning of CSD

Ans.

CSD stands for Current Source Density.

  • CSD is a technique used in neuroscience to analyze the distribution of electrical currents in the brain.

  • It helps in understanding the flow of electrical activity and identifying regions of neural activity.

  • CSD is often used in conjunction with techniques like electroencephalography (EEG) or electrocorticography (ECoG).

Q15. What is the meaning of LOP

Ans.

LOP stands for Line of Position.

  • LOP is a navigational term used in marine and aviation industries.

  • It refers to a line on a chart or map that represents the position of a vessel or aircraft at a specific time.

  • LOP is determined by taking bearings or angles to known landmarks or navigational aids.

  • By intersecting multiple LOPs, the exact position of the vessel or aircraft can be determined.

  • LOP is crucial for navigation and ensuring the safety of the vessel or aircraft.

Q16. What is the meaning of sed

Ans.

sed is a command-line text editor used for stream editing and manipulating text.

  • sed stands for 'stream editor'

  • It is used for performing text transformations on input streams or files

  • sed uses regular expressions to match and modify text

  • It can be used to search, replace, insert, delete, and transform text

  • Example: sed 's/old/new/g' file.txt replaces all occurrences of 'old' with 'new' in file.txt

Q17. 100 kv SLD on AutoCAD.

Ans.

Designing a 100 kv Single Line Diagram on AutoCAD.

  • Create a new drawing in AutoCAD.

  • Use appropriate symbols for electrical components.

  • Draw the lines and connect the components to create the SLD.

  • Label the components and lines with appropriate text.

  • Ensure the SLD is accurate and meets all necessary standards.

  • Save and submit the final design.

Q18. Whats Star -delta starter

Ans.

Star-delta starter is a type of reduced voltage starter used in induction motors to reduce starting current.

  • Consists of a star contactor for starting and a delta contactor for running

  • Reduces starting current by initially connecting the motor windings in star configuration

  • Switches to delta configuration once motor reaches desired speed

  • Commonly used in applications where high starting current is a concern

Q19. Proceasure to make group?

Ans.

To make a group, identify common interests, invite potential members, establish goals and guidelines, and communicate regularly.

  • Identify common interests among potential members

  • Invite potential members to join the group

  • Establish goals and guidelines for the group

  • Communicate regularly to ensure everyone is on the same page

Q20. What is the full form ohe

Ans.

OHE stands for Overhead Equipment.

  • OHE is a system used in railways for supplying electricity to trains through overhead lines.

  • It includes components like catenary wires, droppers, insulators, and feeder pillars.

  • OHE is essential for the operation of electric trains, providing power for traction motors.

  • Regular maintenance of OHE is crucial to ensure safe and efficient train operations.

Q21. Tray size types and dimensions

Ans.

Tray sizes vary depending on the application and can range from 2 inches to 36 inches in width.

  • Tray sizes are determined by the amount and size of cables or wires being carried.

  • Common tray sizes include 12 inches, 18 inches, and 24 inches in width.

  • Tray depths can range from 1.5 inches to 6 inches.

  • Tray materials can include aluminum, steel, or fiberglass.

  • Tray types include ladder, solid bottom, wire mesh, and cable tray.

  • Tray dimensions should be selected based on the specific ...read more

Q22. What do you meaning ssp

Ans.

SSP stands for System Security Plan, which is a document outlining the security measures and protocols for a specific system or project.

  • SSP is a detailed document that includes information on security controls, risk assessments, security policies, and procedures.

  • It outlines how sensitive information will be protected, who has access to it, and how incidents will be handled.

  • Examples of components in an SSP include access control measures, encryption protocols, and incident res...read more

Q23. how about software knowledge

Ans.

Software knowledge is essential for an Electrical Designer to effectively design and analyze electrical systems.

  • Proficiency in CAD software such as AutoCAD or SolidWorks is crucial for creating detailed electrical drawings

  • Knowledge of simulation software like MATLAB or PSpice helps in analyzing and optimizing electrical circuits

  • Familiarity with programming languages like C++ or Python can be beneficial for automation and control systems design

Q24. How to make a block?

Ans.

To make a block, create a 3D model using CAD software and save it as a block. It can then be inserted into other drawings.

  • Create a 3D model using CAD software

  • Select the model and save it as a block

  • Give the block a name and description

  • Insert the block into other drawings as needed

Q25. What is ttc in railway

Ans.

TTC in railway stands for Time to Collision, which is a measure of the time it will take for two objects to collide if they continue on their current path.

  • TTC is used in railway signaling systems to prevent collisions between trains.

  • It calculates the time it will take for a train to reach a certain point based on its current speed and distance.

  • TTC is crucial for ensuring the safety and efficiency of railway operations.

Q26. Use of Star delta starter

Ans.

Star delta starter is used to reduce the starting current of induction motors.

  • Reduces starting current by initially connecting the motor windings in a star configuration and then switching to delta configuration.

  • Used for large induction motors to prevent damage to the motor and reduce voltage drop in the supply.

  • Commonly used in industries where high starting torque is required, such as in conveyor belts or pumps.

Q27. Job aim and targets about year

Ans.

My aim is to continuously improve my skills and knowledge in electrical design, while meeting or exceeding project targets each year.

  • Set specific goals for each project to ensure they are completed on time and within budget

  • Stay updated on the latest technologies and trends in electrical design

  • Collaborate with team members to brainstorm innovative solutions to design challenges

  • Seek feedback from clients and colleagues to identify areas for improvement

  • Attend relevant training a...read more

Q28. Tool test for AutoCAD

Ans.

AutoCAD tool test is essential for electrical designers

  • Familiarity with AutoCAD interface and commands

  • Ability to create and edit electrical drawings

  • Knowledge of electrical symbols and standards

  • Experience with AutoCAD add-ons like AutoCAD Electrical

  • Efficient use of keyboard shortcuts and tool palettes

Q29. E3D modeling on way projects

Ans.

E3D modeling is a software used for designing and modeling electrical systems.

  • E3D modeling is commonly used in the oil and gas industry for designing electrical systems in refineries and chemical plants.

  • It allows for 3D modeling of electrical components and systems, which can help identify potential issues before construction begins.

  • E3D modeling can also be used for creating detailed schematics and wiring diagrams.

  • It is important for electrical designers to have a strong unde...read more

Q30. Haw many types of gears

Ans.

There are several types of gears including spur gears, helical gears, bevel gears, worm gears, etc.

  • Spur gears have straight teeth and are the most common type of gear.

  • Helical gears have angled teeth for smoother operation.

  • Bevel gears have cone-shaped teeth and are used to change the direction of rotation.

  • Worm gears have a screw-like appearance and are used for high torque applications.

Q31. Transmission voltage level

Ans.

Transmission voltage level refers to the voltage at which electricity is transmitted over long distances.

  • Transmission voltage level is typically high to minimize power losses during transmission.

  • Common transmission voltage levels include 69 kV, 138 kV, 230 kV, 345 kV, and 500 kV.

  • Higher voltage levels require specialized equipment and infrastructure for transmission and distribution.

  • Transmission voltage levels are determined based on factors such as distance, load demand, and ...read more

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