Electrical Engineering Interview Questions

Nano technology

What is the application of nano technology in the field of electricals?

Energy conserVATion code

What is energy conserVATion code and why it is required?

Belt weigh feeders

What is the caliberation procedure and its requirement of belt weigh feeders?

Power house

Describe briefly about key functions of utility and power house.

Circuit dynamics

How do we solve for poles and zeros in a circuit dynamics

Min bdv transformer oil

How much min bdv of oil in transformer is required when charged it first time in 11kv, 66kv and 132 kv of transformer?

Insulation value

What is the thumb rule for insulation value in bus bars, phase to phase and phase to earth for 11 & 33 kv system?

Voltage standing wave ratio

List the basic ways of determining the voltage standing wave ratio in a transmission line.

Vfd input frequency

Can vfd step up to 60 hz if it is designed to receive 50 hz input?

Concrete transformer frame

What are the problems that may occur if a transformer frame is made of concrete instead of metal?

Q points

What is the importance of 'q point' in transistor's load line analysis?

Excessive power

How can we make use of excessive power efficiently?

Transformer rating

How to identify transformer rating without name plate details?

Relay dynamic time

What is dynamic time of a numerical or electromagnetic relay?

Power transformer design

Calculate power transformer design for 25kva 33kv/400v

Test new electrical installation

In residential building electrical installation has been completed. How will you test this new electrical installation of building?

Limit short circuit current to twice the full load current

Full load slip of a 400vstar connected 50 hz 3ph im is 3.5 and with locked rotor full load current is circulated if 92v is applied between lines find the necessary tapping on the autotransformer so as to limit short circuit current to twice the full load current.

Leakage currrent

How will you calculate the leakage current?

Power factor

The power is -ve for the first 2ms and then it will -ve what will be the p.F. Angel?

Vfd testing

Can you test a vfd panel with resistive load banks? If yes, how?