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Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.
- 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 'C'. Can you explain this answer?
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Assertion (A): In SI engines, as the engine speed increases, spark is ...
Assertion and Reasoning questions are designed to test the ability of the candidate to correctly identify the relationship between two given statements. Let's break down the given assertion and reasoning statements:
Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.
Reason (R): As the engine speed increases, flame velocity increases.
The assertion statement states that in SI engines, the spark needs to be advanced as the engine speed increases. This means that the ignition timing needs to be adjusted to ensure that the air-fuel mixture ignites at the right time.
The reasoning statement states that as the engine speed increases, the flame velocity also increases. Flame velocity refers to the speed at which the flame front travels through the air-fuel mixture.
Now, let's evaluate the relationship between the two statements:
- Both A and R are individually true: It is true that in SI engines, the spark needs to be advanced as the engine speed increases, and it is also true that as the engine speed increases, the flame velocity increases.
- R is not the correct explanation of A: While it is true that an increase in engine speed leads to an increase in flame velocity, this is not the only reason why the spark needs to be advanced. The main reason for advancing the spark is to ensure that the air-fuel mixture ignites at the right time, which is crucial for the engine to run smoothly and efficiently.
Therefore, the correct answer is option C: A is true but R is false.
Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.
Reason (R): As the engine speed increases, flame velocity increases.
The assertion statement states that in SI engines, the spark needs to be advanced as the engine speed increases. This means that the ignition timing needs to be adjusted to ensure that the air-fuel mixture ignites at the right time.
The reasoning statement states that as the engine speed increases, the flame velocity also increases. Flame velocity refers to the speed at which the flame front travels through the air-fuel mixture.
Now, let's evaluate the relationship between the two statements:
- Both A and R are individually true: It is true that in SI engines, the spark needs to be advanced as the engine speed increases, and it is also true that as the engine speed increases, the flame velocity increases.
- R is not the correct explanation of A: While it is true that an increase in engine speed leads to an increase in flame velocity, this is not the only reason why the spark needs to be advanced. The main reason for advancing the spark is to ensure that the air-fuel mixture ignites at the right time, which is crucial for the engine to run smoothly and efficiently.
Therefore, the correct answer is option C: A is true but R is false.
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Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.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 'C'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.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 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.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 'C'. Can you explain this answer?.
Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.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 'C'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.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 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.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 'C'. Can you explain this answer?.
Solutions for Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.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 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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ample number of questions to practice Assertion (A): In SI engines, as the engine speed increases, spark is required to be advanced.Reason (R): As the engine speed increases, flame velocity increases.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 'C'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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