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The probability of knocking in diesel engines is increased by
- a)high self ignition temperature
- b)low volatility
- c)higher viscosity
- d)all of these
Correct answer is option 'D'. Can you explain this answer?
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The probability of knocking in diesel engines is increased bya)high se...
Explanation:
Knocking in diesel engines is a phenomenon when the fuel-air mixture ignites spontaneously before the intended spark ignition. This can cause damage to engine components and decrease efficiency. The probability of knocking is increased by various factors such as:
High self-ignition temperature:
Diesel fuel has a high self-ignition temperature, which means it requires high temperature and pressure to ignite. However, if the compression ratio of the engine is too high or if the fuel has impurities, it can ignite prematurely and cause knocking.
Low volatility:
Volatility refers to the ability of a fuel to vaporize. Diesel fuel has low volatility, which means it requires high temperature and pressure to vaporize. However, if the fuel is exposed to high temperatures for a long time, it can vaporize and form pockets of flammable gas that can ignite prematurely and cause knocking.
Higher viscosity:
Viscosity refers to the thickness or resistance to flow of a fluid. Diesel fuel has higher viscosity than gasoline, which means it requires more pressure to flow. This can cause incomplete combustion and increase the probability of knocking.
All of these factors can increase the probability of knocking in diesel engines. Therefore, it is important to maintain the engine components and use high-quality fuel to prevent knocking.
Knocking in diesel engines is a phenomenon when the fuel-air mixture ignites spontaneously before the intended spark ignition. This can cause damage to engine components and decrease efficiency. The probability of knocking is increased by various factors such as:
High self-ignition temperature:
Diesel fuel has a high self-ignition temperature, which means it requires high temperature and pressure to ignite. However, if the compression ratio of the engine is too high or if the fuel has impurities, it can ignite prematurely and cause knocking.
Low volatility:
Volatility refers to the ability of a fuel to vaporize. Diesel fuel has low volatility, which means it requires high temperature and pressure to vaporize. However, if the fuel is exposed to high temperatures for a long time, it can vaporize and form pockets of flammable gas that can ignite prematurely and cause knocking.
Higher viscosity:
Viscosity refers to the thickness or resistance to flow of a fluid. Diesel fuel has higher viscosity than gasoline, which means it requires more pressure to flow. This can cause incomplete combustion and increase the probability of knocking.
All of these factors can increase the probability of knocking in diesel engines. Therefore, it is important to maintain the engine components and use high-quality fuel to prevent knocking.
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The probability of knocking in diesel engines is increased bya)high self ignition temperatureb)low volatilityc)higher viscosityd)all of theseCorrect answer is option 'D'. Can you explain this answer?
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