Mechanical Engineering Exam > Mechanical Engineering Questions > Detonation is said to take place in the engin...
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Detonation is said to take place in the engine when
- a)sudden acceleration is imparted to the engine
- b)temperature rise is too high
- c)high pressure waves are set up
- d)combustion of fuels takes place without spark provided to it.
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Detonation is said to take place in the engine whena)sudden accelerati...
The rate of pressure rise is high per degree of crank rotation for knocking combustion and finally causes heavy vibrations in the engine due to pressure waves.
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Detonation is said to take place in the engine whena)sudden accelerati...
Detonation in an Engine
Detonation is a type of abnormal combustion that takes place in the engine. It is also known as knocking, pinging or spark knock. It occurs when the air-fuel mixture in the engine cylinder explodes instead of burning in a controlled manner. This is caused by the sudden increase in pressure and temperature inside the cylinder.
Causes of Detonation
There are several factors that can cause detonation in an engine. Some of them are as follows:
1. High Pressure Waves: Detonation occurs when high pressure waves are set up in the combustion chamber due to the rapid increase in pressure and temperature.
2. Low Octane Fuel: Low octane fuel can cause detonation in the engine because it has a low resistance to detonation.
3. Overheating: Overheating of the engine can also cause detonation because it increases the temperature inside the combustion chamber.
4. Carbon Deposits: Carbon deposits can also cause detonation because they can act as hot spots inside the engine.
Effects of Detonation
Detonation can cause several problems in the engine. Some of them are as follows:
1. Damage to the Engine: Detonation can cause damage to the engine because it can cause the piston to hit the cylinder wall.
2. Reduced Performance: Detonation can also reduce the performance of the engine because it can cause a loss of power and fuel efficiency.
3. Increased Emissions: Detonation can also increase the emissions of the engine because it can cause incomplete combustion.
Conclusion
Detonation is a serious problem that can cause damage to the engine and reduce its performance. It is important to take steps to prevent detonation from occurring, such as using high octane fuel and maintaining the engine properly.
Detonation is a type of abnormal combustion that takes place in the engine. It is also known as knocking, pinging or spark knock. It occurs when the air-fuel mixture in the engine cylinder explodes instead of burning in a controlled manner. This is caused by the sudden increase in pressure and temperature inside the cylinder.
Causes of Detonation
There are several factors that can cause detonation in an engine. Some of them are as follows:
1. High Pressure Waves: Detonation occurs when high pressure waves are set up in the combustion chamber due to the rapid increase in pressure and temperature.
2. Low Octane Fuel: Low octane fuel can cause detonation in the engine because it has a low resistance to detonation.
3. Overheating: Overheating of the engine can also cause detonation because it increases the temperature inside the combustion chamber.
4. Carbon Deposits: Carbon deposits can also cause detonation because they can act as hot spots inside the engine.
Effects of Detonation
Detonation can cause several problems in the engine. Some of them are as follows:
1. Damage to the Engine: Detonation can cause damage to the engine because it can cause the piston to hit the cylinder wall.
2. Reduced Performance: Detonation can also reduce the performance of the engine because it can cause a loss of power and fuel efficiency.
3. Increased Emissions: Detonation can also increase the emissions of the engine because it can cause incomplete combustion.
Conclusion
Detonation is a serious problem that can cause damage to the engine and reduce its performance. It is important to take steps to prevent detonation from occurring, such as using high octane fuel and maintaining the engine properly.
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Detonation is said to take place in the engine whena)sudden acceleration is imparted to the engineb)temperature rise is too highc)high pressure waves are set upd)combustion of fuels takes place without spark provided to it.Correct answer is option 'C'. Can you explain this answer?
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