Practice Air-standard Otto Cycle (si Engines) (4.1) - Power and Refrigeration Cycles

Practice: Air-Standard Otto Cycle (SI Engines)

Lesson 4.1Power and Refrigeration Cycles

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10 questions

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6 sample questions

Question 1.
What does isentropic mean in the context of the Otto Cycle?
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Think about the temperature and heat flow during this phase.
Question 2.
Identify the four main processes of the Otto Cycle.
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Recall the sequence of the cycle.
3Question 3.
What is the first process in the Air-Standard Otto cycle?
- Constant volume heat addition
- Isentropic Expansion
- Isentropic Compression
- Constant volume heat rejection
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Think about the initial phase of the cycle.
4Question 4.
Is the constant volume heat addition process exothermic?
- True
- False
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Consider energy release in combustion.
Question 5.
An Otto engine operates with a compression ratio of 8.1 and a specific heat ratio of 1.4. Calculate the thermal efficiency. What improvements can be suggested for better efficiency?
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Focus on applying the efficiency formula correctly.
Question 6.
If the temperature at the end of compression is 200°C, what would be the theoretical maximum work produced by the gas during the expansion phase assuming it behaves like an ideal gas?
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Check how to derive work done from expansion process.

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