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Which of the following factor(s) increase(s) the tendency for knocking in theC.I. engine?
- a)Increasing both the compression ratio and the coolant temperature
- b)Increasing both the speed and the injection advance
- c)Increasing the speed, injection advance and coolant temperature
- d)Increasing the compression ratio
Correct answer is option 'B'. Can you explain this answer?
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Which of the following factor(s) increase(s) the tendency for knocking...
Ans. (b) Increasing coolant temperature will reduce knocking in C I engine.
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Which of the following factor(s) increase(s) the tendency for knocking...
Factors that increase the tendency for knocking in a C.I. engine:
Increasing both the speed and the injection advance can increase the tendency for knocking in a C.I. engine. This is because:
Speed:
- At higher engine speeds, there is less time for the fuel to burn completely, leading to incomplete combustion.
- This incomplete combustion can cause unburned fuel to mix with air and ignite spontaneously, before the spark plug fires, causing knocking.
Injection advance:
- Injection advance refers to the timing of when the fuel is injected into the cylinder.
- Advancing the injection timing means that the fuel is injected earlier in the cycle.
- This can cause the fuel to ignite too early, before the piston is in the correct position, leading to knocking.
Other factors that can contribute to knocking:
- High compression ratio: A high compression ratio increases the pressure and temperature inside the cylinder, which can cause the fuel to ignite spontaneously and cause knocking.
- High coolant temperature: A high coolant temperature can cause pre-ignition, where the fuel ignites before the spark plug fires, leading to knocking.
In summary, increasing both the speed and injection advance can increase the tendency for knocking in a C.I. engine, but other factors such as high compression ratio and coolant temperature can also contribute.
Increasing both the speed and the injection advance can increase the tendency for knocking in a C.I. engine. This is because:
Speed:
- At higher engine speeds, there is less time for the fuel to burn completely, leading to incomplete combustion.
- This incomplete combustion can cause unburned fuel to mix with air and ignite spontaneously, before the spark plug fires, causing knocking.
Injection advance:
- Injection advance refers to the timing of when the fuel is injected into the cylinder.
- Advancing the injection timing means that the fuel is injected earlier in the cycle.
- This can cause the fuel to ignite too early, before the piston is in the correct position, leading to knocking.
Other factors that can contribute to knocking:
- High compression ratio: A high compression ratio increases the pressure and temperature inside the cylinder, which can cause the fuel to ignite spontaneously and cause knocking.
- High coolant temperature: A high coolant temperature can cause pre-ignition, where the fuel ignites before the spark plug fires, leading to knocking.
In summary, increasing both the speed and injection advance can increase the tendency for knocking in a C.I. engine, but other factors such as high compression ratio and coolant temperature can also contribute.
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Which of the following factor(s) increase(s) the tendency for knocking in theC.I. engine?a)Increasing both the compression ratio and the coolant temperatureb)Increasing both the speed and the injection advancec)Increasing the speed, injection advance and coolant temperatured)Increasing the compression ratioCorrect answer is option 'B'. Can you explain this answer?
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Which of the following factor(s) increase(s) the tendency for knocking in theC.I. engine?a)Increasing both the compression ratio and the coolant temperatureb)Increasing both the speed and the injection advancec)Increasing the speed, injection advance and coolant temperatured)Increasing the compression ratioCorrect 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 Which of the following factor(s) increase(s) the tendency for knocking in theC.I. engine?a)Increasing both the compression ratio and the coolant temperatureb)Increasing both the speed and the injection advancec)Increasing the speed, injection advance and coolant temperatured)Increasing the compression ratioCorrect 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 Which of the following factor(s) increase(s) the tendency for knocking in theC.I. engine?a)Increasing both the compression ratio and the coolant temperatureb)Increasing both the speed and the injection advancec)Increasing the speed, injection advance and coolant temperatured)Increasing the compression ratioCorrect answer is option 'B'. Can you explain this answer?.
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