Hansen Technologies Interview Questions and Answers

Power factor can be improved by using capacitors, reducing reactive power, and improving system design.

• Installing power factor correction capacitors can reduce reactive power and improve power factor.

• Reducing the use of inductive loads and increasing the use of capacitive loads can improve power factor.

• Improving system design by minimizing voltage drops, using efficient transformers, and properly sizing conductors can improve power factor.

• Implementing power factor correction ...read more

Conductors, semiconductors, and insulators are materials that differ in their ability to conduct electricity.

• Conductors have high electrical conductivity and allow the flow of electric current easily.

• Semiconductors have moderate electrical conductivity, which can be controlled by adding impurities or applying voltage.

• Insulators have very low electrical conductivity and do not allow the flow of electric current.

• Conductors include metals like copper, silver, and gold.

• Semiconduc...read more

Renewable sources of energy are natural resources that can be replenished and are not depleted with use.

• Solar energy: harnessing the power of the sun through solar panels

• Wind energy: converting wind into electricity using wind turbines

• Hydroelectric power: generating electricity from flowing or falling water

• Geothermal energy: utilizing heat from the Earth's core

• Biomass energy: converting organic matter into fuel

• Tidal energy: capturing energy from the tides

• Wave energy: harnessi...read more

Electrical engineering focuses on power generation and distribution, while electronics engineering deals with electronic devices and circuits.

• Electrical engineering deals with large-scale power systems, such as power plants and electrical grids.

• Electronics engineering focuses on small-scale electronic devices, such as computers, smartphones, and microchips.

• Electrical engineering involves the study of power generation, transmission, and distribution.

• Electronics engineering inv...read more

There are two types of temperature coefficient: positive and negative.

• Positive temperature coefficient (PTC) - resistance increases with temperature

• Negative temperature coefficient (NTC) - resistance decreases with temperature

• PTC is used in thermistors for overcurrent protection

• NTC is used in temperature sensors for temperature measurement

The motor with the highest starting torque is the DC series motor.

• DC series motor has the highest starting torque among all types of motors.

• This is because the field winding and armature winding are connected in series, allowing for high starting torque.

• Examples of applications where high starting torque is required include electric trains and elevators.

Kirchhoff's laws are fundamental principles in electrical engineering that describe the conservation of charge and energy in electrical circuits.

• Kirchhoff's Current Law (KCL) states that the total current entering a junction in a circuit must equal the total current leaving the junction.

• Kirchhoff's Voltage Law (KVL) states that the sum of the voltage drops around any closed loop in a circuit must equal the sum of the voltage sources in that loop.

• KCL is based on the principle ...read more

The unit of charge is Coulomb (C).

• The unit of charge is named after the French physicist Charles-Augustin de Coulomb.

• One Coulomb is equal to the charge of approximately 6.242 x 10^18 protons or electrons.

• Charge is a fundamental property of matter and can be positive or negative.