Ultramarine & Pigments Interview Questions and Answers

Power system is a network of electrical components used to generate, transmit, and distribute electrical power.

• Power system is a network of power generation plants, transmission lines, substations, and distribution networks.

• It involves the generation of electrical power from various sources such as coal, natural gas, hydro, wind, or solar.

• The generated power is then transmitted over long distances through high-voltage transmission lines.

• At substations, the voltage is stepped ...read more

Motor starters are devices used to start and stop motors. There are several types of motor starters.

• Direct On Line (DOL) starters

• Star-Delta starters

• Soft starters

• Variable Frequency Drive (VFD) starters

• Auto-transformer starters

Factors that affect power in electrical systems.

• Resistance: higher resistance leads to lower power

• Voltage: higher voltage leads to higher power

• Current: higher current leads to higher power

• Power factor: lower power factor leads to lower power

• Load: heavier load leads to higher power consumption

• Temperature: higher temperature leads to lower power

• Frequency: higher frequency leads to higher power

• Wire size: smaller wire size leads to lower power

• Transformer efficiency: lower efficie...read more

There are various types of motors used in electrical systems.

• AC motors: Induction motor, Synchronous motor

• DC motors: Shunt motor, Series motor, Compound motor

• Special motors: Servo motor, Stepper motor

• Single-phase motors: Split-phase motor, Capacitor-start motor

• Three-phase motors: Squirrel cage motor, Wound rotor motor

There are various types of generators including diesel, gas, wind, solar, and hydroelectric generators.

• Diesel generators are commonly used in industries and commercial buildings.

• Gas generators are used for backup power in residential areas.

• Wind turbines are used to generate electricity in areas with high wind speeds.

• Solar generators use photovoltaic cells to convert sunlight into electricity.

• Hydroelectric generators use the force of moving water to generate electricity.