- 1. Power systems refer to the complex network of generation, transmission, distribution, and utilization of electrical energy. They play a crucial role in supplying electricity to support modern societies and industries. Power plants, substations, transformers, and transmission lines are key components of power systems. The efficiency, reliability, and safety of power systems are paramount to ensure continuous and stable electricity supply. Advances in technology, such as smart grids and renewable energy integration, are transforming traditional power systems and paving the way for a sustainable and resilient energy future.
What is the main purpose of a power system?
A) To convert kinetic energy into electricity
B) To transmit and distribute electrical energy
C) To store energy in batteries
D) To generate renewable energy
- 2. Which component is responsible for converting mechanical energy into electrical energy in a power system?
A) Transformer
B) Circuit breaker
C) Inverter
D) Generator
- 3. What is the standard frequency used in most power systems around the world?
A) 100 Hz
B) 50 Hz or 60 Hz
C) 70 Hz
D) 30 Hz
- 4. What does AC stand for in AC power systems?
A) Always Connected
B) Active Current
C) Alternating Current
D) Artificial Current
- 5. In a power system, what is the purpose of a step-up transformer?
A) To regulate frequency
B) To decrease voltage for household use
C) To convert AC to DC
D) To increase voltage for long-distance transmission
- 6. What is the unit of electrical power?
A) Ampere
B) Watt
C) Volt
D) Ohm
- 7. What type of fault occurs when two or more conductors accidentally come into contact?
A) Short Circuit
B) Open Circuit
C) Ground Fault
D) Overload
- 8. Which type of power system enables two-way flow of electricity and information?
A) Grid-tied System
B) Islanded System
C) Microgrid
D) Smart Grid
- 9. What type of power is expressed by the product of voltage and current in a circuit?
A) Apparent Power
B) Reactive Power
C) Complex Power
D) Real Power
- 10. What is the primary function of a switchgear in a power system?
A) To store energy
B) To generate electricity
C) To regulate frequency
D) To control, protect, and isolate electrical equipment
- 11. Which device is commonly used in power systems to change the voltage levels for transmission?
A) Circuit breaker
B) Transformer
C) Generator
D) Inverter
- 12. What is the SI unit of electrical resistance?
A) Volt
B) Ampere
C) Ohm
D) Watt
- 13. In power systems, what do transmission lines primarily carry?
A) Electricity
B) Water
C) Internet data
D) Natural gas
- 14. Which type of power system operates independently from the main power grid?
A) Microgrid
B) Grid-tied System
C) Smart Grid
D) Islanded System
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