Electrical Engineering XYZ MCQs
Efficiency of thermal power plant can be mathematically calculated as:
- Turbine efficiency
- Generator efficiency
- Efficiency of thermal cycle
- Product of efficiencies of all stages
Correct answer: 4. Product of efficiencies of all stages
Explanation:
The efficiency of a thermal power plant can be mathematically calculated as the product of the efficiencies of its individual components. Among the options provided:
- Turbine efficiency: This represents the efficiency of the turbine, which is a key component in converting thermal energy into mechanical energy. It is an important factor in the overall efficiency of the power plant.
- Generator efficiency: This refers to the efficiency of the electrical generator in converting mechanical energy from the turbine into electrical energy. It is also a significant factor in determining the overall efficiency of the power plant.
- Efficiency of thermal cycle: This term typically refers to the overall efficiency of the thermodynamic cycle within the power plant, taking into account the heat input and the work output.
The correct answer is: Product of efficiencies of all stages
This means that the overall efficiency (η) can be calculated as:
η=ηturbine × ηgenerator ×ηthermal cycle
In other words, the efficiency of the entire thermal power plant is determined by multiplying the efficiencies of its individual components, including the turbine, generator, and the overall thermal cycle.