Dineshchandra R. Agrawal Infracon Manager – Electrical Interview Questions and Answers

The process for calculating electrical load involves determining the total power consumption of all devices connected to a circuit or system.

• Identify all devices connected to the circuit or system

• Determine the power rating (in watts) of each device

• Calculate the total power consumption by summing up the power ratings of all devices

• Consider factors like power factor and diversity to account for variations in load

Transformer and diesel generator sizing involves calculating load requirements and selecting appropriate equipment.

• Calculate total connected load to determine transformer size

• Consider future load growth when sizing transformers

• Calculate total power requirements to determine DG set size

• Factor in starting currents and power factor when sizing DG sets

• Consult manufacturer specifications for accurate sizing

Different types of transformers include power transformers, distribution transformers, instrument transformers, and autotransformers.

• Power transformers are used to step up or step down voltage for transmission and distribution.

• Distribution transformers are used to supply lower voltage to end-users.

• Instrument transformers are used for measuring voltage and current in high voltage systems.

• Autotransformers have a single w...read more

Various types and sizes of cables are available in the market for different electrical applications.

• Types of cables include power cables, control cables, instrumentation cables, communication cables, etc.

• Sizes of cables range from small gauge sizes like 18 AWG to larger sizes like 1000 MCM.

• Examples of cables include THHN, XHHW, Cat5e, RG6, etc.

Different types of earthing include plate earthing, pipe earthing, rod earthing, strip earthing, and water pipe earthing.

• Plate earthing involves burying a plate made of copper or galvanized iron in the ground.

• Pipe earthing uses a pipe made of galvanized iron to provide a low-resistance path to the ground.

• Rod earthing involves driving a metal rod into the ground to provide a connection for earthing.

• Strip earthing uses a...read more

Various electrical hazards include electric shock, burns, fires, and explosions.

• Electric shock from contact with live wires or equipment

• Burns from electrical arcs or overheated equipment

• Fires caused by electrical faults or short circuits

• Explosions due to ignition of flammable materials by electrical sparks

• Injuries from falls caused by electric shock or sudden movements due to electrical hazards

I was the Senior Electrical Engineer in my previous company.

• Managed a team of electrical engineers

• Responsible for designing and implementing electrical systems

• Collaborated with other departments to ensure project success

I am available to join within 2 weeks of receiving the offer letter.

• Available to join within 2 weeks of receiving offer letter

• Flexible with start date based on company needs

• Can discuss potential start date during interview process

My notice period is currently one month.

• Notice period is one month

• I am required to give one month notice before leaving my current position

• I can start in one month if selected for this role