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Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.
Reason(R): In the Diesel cycle, work is also delivered during heat addition.
Reason(R): In the Diesel cycle, work is also delivered during heat addition.
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
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Assertion (A): For a given compression ratio, the thermal efficiency o...
Ans. (d) For same compression ratio Otto cycle has maximum efficiency.
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Assertion (A): For a given compression ratio, the thermal efficiency o...
Assertion: For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.
Reason: In the Diesel cycle, work is also delivered during heat addition.
The correct answer is option 'D': A is false but R is true.
Explanation:
Understanding the Diesel and Otto Cycles:
- The Diesel cycle and the Otto cycle are two thermodynamic cycles that are commonly used in internal combustion engines.
- The Diesel cycle is used in diesel engines, while the Otto cycle is used in gasoline engines.
- Both cycles are idealized models that describe the processes that occur in the engine during a complete cycle of operation.
Comparison of Diesel and Otto Cycles:
- Both the Diesel and Otto cycles consist of four processes: intake, compression, combustion, and exhaust.
- The main difference between the two cycles is the way in which the fuel is ignited.
- In the Otto cycle, the fuel-air mixture is ignited by a spark plug, while in the Diesel cycle, the fuel is injected into the combustion chamber and ignited by the heat of compression.
Thermal Efficiency:
- The thermal efficiency of a cycle is a measure of how effectively the heat energy in the fuel is converted into useful work.
- It is defined as the ratio of the net work output to the heat input.
Analysis of the Assertion and Reason:
- The assertion states that for a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.
- The reason given for this is that in the Diesel cycle, work is also delivered during heat addition.
- However, this reasoning is incorrect.
- In both the Diesel and Otto cycles, work is done during heat addition.
- The main difference between the two cycles is the way in which the heat addition occurs, not the presence or absence of work during this process.
- The Diesel cycle has a higher thermal efficiency compared to the Otto cycle due to its higher compression ratio.
- The higher compression ratio in the Diesel cycle allows for a higher expansion ratio, which results in a more efficient conversion of heat energy into useful work.
- Therefore, the correct answer is option 'D': A is false but R is true.
Reason: In the Diesel cycle, work is also delivered during heat addition.
The correct answer is option 'D': A is false but R is true.
Explanation:
Understanding the Diesel and Otto Cycles:
- The Diesel cycle and the Otto cycle are two thermodynamic cycles that are commonly used in internal combustion engines.
- The Diesel cycle is used in diesel engines, while the Otto cycle is used in gasoline engines.
- Both cycles are idealized models that describe the processes that occur in the engine during a complete cycle of operation.
Comparison of Diesel and Otto Cycles:
- Both the Diesel and Otto cycles consist of four processes: intake, compression, combustion, and exhaust.
- The main difference between the two cycles is the way in which the fuel is ignited.
- In the Otto cycle, the fuel-air mixture is ignited by a spark plug, while in the Diesel cycle, the fuel is injected into the combustion chamber and ignited by the heat of compression.
Thermal Efficiency:
- The thermal efficiency of a cycle is a measure of how effectively the heat energy in the fuel is converted into useful work.
- It is defined as the ratio of the net work output to the heat input.
Analysis of the Assertion and Reason:
- The assertion states that for a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.
- The reason given for this is that in the Diesel cycle, work is also delivered during heat addition.
- However, this reasoning is incorrect.
- In both the Diesel and Otto cycles, work is done during heat addition.
- The main difference between the two cycles is the way in which the heat addition occurs, not the presence or absence of work during this process.
- The Diesel cycle has a higher thermal efficiency compared to the Otto cycle due to its higher compression ratio.
- The higher compression ratio in the Diesel cycle allows for a higher expansion ratio, which results in a more efficient conversion of heat energy into useful work.
- Therefore, the correct answer is option 'D': A is false but R is true.
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Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.Reason(R): In the Diesel cycle, work is also delivered during heat addition.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?
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Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.Reason(R): In the Diesel cycle, work is also delivered during heat addition.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.Reason(R): In the Diesel cycle, work is also delivered during heat addition.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.Reason(R): In the Diesel cycle, work is also delivered during heat addition.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?.
Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.Reason(R): In the Diesel cycle, work is also delivered during heat addition.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.Reason(R): In the Diesel cycle, work is also delivered during heat addition.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.Reason(R): In the Diesel cycle, work is also delivered during heat addition.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?.
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ample number of questions to practice Assertion (A): For a given compression ratio, the thermal efficiency of the Diesel cycle will be higher than that of the Otto cycle.Reason(R): In the Diesel cycle, work is also delivered during heat addition.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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