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Assertion (A): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.
- 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 'B'. Can you explain this answer?
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Assertion (A): The C.I. engine is found to be more efficient than an S...
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Assertion (A): The C.I. engine is found to be more efficient than an S...
First statement is correct that's because of higher compression ratio of CI engine than SI..eff of CI will b more than that of SI..Second statement is incorrect because efficiency of dual cycle will always b lesser than that of Otto unless u r given with any condition like...max pressure or heat input etc...so general case we take eff of dual< eff="" of="" otto="" eff="" of="" />
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Assertion (A): The C.I. engine is found to be more efficient than an S...
Assertion (A): The C.I. engine is found to be more efficient than an S.I. engine.
Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greater than the Otto cycle.
The given assertion and reason are both related to the comparison between a Compression Ignition (C.I.) engine and a Spark Ignition (S.I.) engine in terms of efficiency.
A. C.I. engine being more efficient than an S.I. engine:
A C.I. engine, also known as a diesel engine, is typically more efficient than an S.I. engine, also known as a gasoline engine. This is primarily due to the higher compression ratio and the absence of a throttle valve in a C.I. engine. The absence of a throttle valve allows for a higher air-fuel ratio, leading to better combustion efficiency. Additionally, the higher compression ratio in a C.I. engine allows for better thermal efficiency. Overall, these factors contribute to the higher efficiency of C.I. engines compared to S.I. engines.
R. Dual-cycle efficiency of modern C.I. engines:
Modern C.I. engines operate on a dual-cycle, which combines aspects of both the Otto cycle and the Diesel cycle. The Otto cycle is the idealized cycle for S.I. engines, while the Diesel cycle is the idealized cycle for C.I. engines. The dual-cycle used in modern C.I. engines is a modified version of the Diesel cycle, which incorporates a constant volume heat addition process similar to the Otto cycle. This modification improves the overall efficiency of the C.I. engine by increasing the heat addition process's efficiency.
Explanation:
Both the assertion and the reason are individually true. C.I. engines are generally more efficient than S.I. engines due to their higher compression ratio and absence of a throttle valve. Additionally, the reason provided for the higher efficiency of modern C.I. engines is also correct. Modern C.I. engines operate on a dual-cycle, which combines aspects of both the Otto cycle and the Diesel cycle, resulting in improved efficiency.
Conclusion:
Both assertion (A) and reason (R) are true, and the reason (R) is the correct explanation of the assertion (A). Therefore, option B is the correct answer.
Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greater than the Otto cycle.
The given assertion and reason are both related to the comparison between a Compression Ignition (C.I.) engine and a Spark Ignition (S.I.) engine in terms of efficiency.
A. C.I. engine being more efficient than an S.I. engine:
A C.I. engine, also known as a diesel engine, is typically more efficient than an S.I. engine, also known as a gasoline engine. This is primarily due to the higher compression ratio and the absence of a throttle valve in a C.I. engine. The absence of a throttle valve allows for a higher air-fuel ratio, leading to better combustion efficiency. Additionally, the higher compression ratio in a C.I. engine allows for better thermal efficiency. Overall, these factors contribute to the higher efficiency of C.I. engines compared to S.I. engines.
R. Dual-cycle efficiency of modern C.I. engines:
Modern C.I. engines operate on a dual-cycle, which combines aspects of both the Otto cycle and the Diesel cycle. The Otto cycle is the idealized cycle for S.I. engines, while the Diesel cycle is the idealized cycle for C.I. engines. The dual-cycle used in modern C.I. engines is a modified version of the Diesel cycle, which incorporates a constant volume heat addition process similar to the Otto cycle. This modification improves the overall efficiency of the C.I. engine by increasing the heat addition process's efficiency.
Explanation:
Both the assertion and the reason are individually true. C.I. engines are generally more efficient than S.I. engines due to their higher compression ratio and absence of a throttle valve. Additionally, the reason provided for the higher efficiency of modern C.I. engines is also correct. Modern C.I. engines operate on a dual-cycle, which combines aspects of both the Otto cycle and the Diesel cycle, resulting in improved efficiency.
Conclusion:
Both assertion (A) and reason (R) are true, and the reason (R) is the correct explanation of the assertion (A). Therefore, option B is the correct answer.
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Assertion (A): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.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 'B'. Can you explain this answer?
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Assertion (A): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.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 'B'. 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): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.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 'B'. 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): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.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 'B'. Can you explain this answer?.
Assertion (A): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.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 'B'. 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): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.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 'B'. 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): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.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 'B'. Can you explain this answer?.
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ample number of questions to practice Assertion (A): The C.I. engine is found to be more efficient than an S.I. engine.Reason (R): Modern C.I. engines operate on a dual-cycle, which has efficiency greaterthan the Otto cycle.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 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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