a. Renewable Energy sources are generally green sources of energy (True/False) b. CNG mainly consists of ____ (ethane/methane/propane/none) c. Petrol engine works on ____ cycle (Ot... a. Renewable Energy sources are generally green sources of energy (True/False) b. CNG mainly consists of ____ (ethane/methane/propane/none) c. Petrol engine works on ____ cycle (Otto/Diesel/Dual/Brayton) d. The compression ratio of petrol engine (less than 10/more than 16/more than 24/none) 1. Write the differences between renewable and non-renewable energy. 2. Draw pv and Ts diagrams of Carnot, Otto and Diesel cycles. 3. The compression ratio of an ideal Otto cycle is 6. Find the air standard efficiency of the cycle. Take γ = 1.4. 4. Write the differences between CI and SI engines.
Understand the Problem
The question consists of multiple parts related to energy sources, engine cycles, and their efficiencies. It asks for true/false statements, specific compositions, characteristics of different engine types, diagrams for thermodynamic cycles, and calculations related to engine performance.
Answer
Q1: a) True, b) Methane, c) Otto, d) Less than 10. Efficiency of Otto cycle is 47%.
Q1: a) True, b) Methane, c) Otto, d) Less than 10.
- Renewable energy is derived from sources that are replenished naturally, like wind and solar. Non-renewable energy comes from sources that have a limited supply, such as coal and oil.
- p-v and T-s diagrams illustrate the various thermodynamic cycles showing pressure vs. volume and temperature vs. entropy.
- The efficiency of the Otto cycle is ~0.47 or 47%.
- CI engines ignite fuel by heat of compression, while SI engines use spark plugs.
Answer for screen readers
Q1: a) True, b) Methane, c) Otto, d) Less than 10.
- Renewable energy is derived from sources that are replenished naturally, like wind and solar. Non-renewable energy comes from sources that have a limited supply, such as coal and oil.
- p-v and T-s diagrams illustrate the various thermodynamic cycles showing pressure vs. volume and temperature vs. entropy.
- The efficiency of the Otto cycle is ~0.47 or 47%.
- CI engines ignite fuel by heat of compression, while SI engines use spark plugs.
More Information
Renewable energy, like solar and wind, is often cleaner and more sustainable. The efficiency of the Otto cycle is calculated using thermodynamic principles. CI and SI engines differ mainly in their method of ignition.
Tips
Common mistakes include confusing the cycles for different types of engines or using wrong values for efficiency calculations.
Sources
- Overview of Unit 3 The Issue of Renewable Energy - aps.edu
- Renewable Energy Resources MCQ Merged - scribd.com
- What is renewable energy? | United Nations - un.org
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