Introduction to Power Systems - JSS2 Basic technology Past Questions and Answers - page 2
What is the importance of grid stability in power systems?
To increase energy looses
To reduce electricity demand
To ensure reliable power supply
To regulate gas production
Why are demonstrations of power systems essential?
To study marine biology
To understand electrical engineering principles
To promote space exploration
To improve agricultural techniques
Which component of power systems adjusts voltage levels for efficient electricity transmission?
Transformers
Distribution systems
Generators
Transmission lines
What does efficient transmission of electricity over long distances help minimise?
Energy production
Water supply
Energy losses
Gas consumption
How do power systems contribute to infrastructure development?
By reducing electricity access
By increasing traffic congestion
By providing energy for construction projects
By promoting environmental pollution
What is the primary function of power systems in modern infrastructure?
Power systems serve the essential role of generating, transmitting, and distributing electrical energy to meet the demand of residential, commercial, and industrial sectors. They ensure a reliable supply of electricity for everyday activities, economic productivity, and infrastructure development, supporting societal needs and technological advancements.
How do generators contribute to power systems, and what energy sources can they utilise?
Generators are pivotal in power systems as they convert mechanical energy into electrical energy. They can utilise a variety of energy sources such as fossil fuels (like coal, oil, and natural gas), renewable sources (such as hydroelectric, wind, solar, and geothermal), and nuclear energy. This versatility allows generators to adapt to different energy demands and environmental considerations.
What role do transformers play in power systems, and why are they necessary for efficient energy distribution?
Transformers play a crucial role in power systems by stepping up or stepping down voltage levels as needed for efficient transmission and distribution of electricity. They enable electricity generated at power plants to be transmitted at high voltages over long distances with minimal energy loss and then stepped down to safer voltages suitable for residential and commercial use. This process ensures efficient energy distribution and reduces transmission losses.
How do transmission lines facilitate the transport of electricity in power systems, and what benefits do high-voltage transmission lines offer?
Transmission lines are essential in power systems as they transport electricity from power plants to substations and ultimately to consumers. High-voltage transmission lines are preferred for long-distance transport because they minimise energy losses during transmission. By transmitting electricity at high voltages, the amount of current needed to deliver a specific amount of power is reduced, thereby reducing resistive losses along the transmission lines and ensuring efficient energy transport.
Why are practical demonstrations and examples important for understanding power systems?
Practical demonstrations provide tangible insights into the operation and significance of power systems components such as generators, transformers, and transmission lines. They illustrate how these components work together to ensure reliable electricity supply, demonstrate safety protocols, and showcase technological advancements in energy generation and distribution. Hands-on experiences also enhance understanding of theoretical concepts and foster practical skills essential for careers in electrical engineering and energy management.