Which fuel is used in SI engine?
SI engines are commonly fueled on gasoline, with the fuel characterized based on octane number. The octane number defines the fuel’s ability to reduce autoignition or knock, with the higher the octane number, the higher the resistance to autoignition.
What are the qualities of fuel?
It should possess high calorific value.
What qualities are desired in fuels to inhibit detonation?
In order to avoid or inhibit detonation, a high auto ignition temperature and a long ignition lag are the desirable qualities for SI engine fuel. 8. Explain the type of vibration produced when auto ignition occurs. Two different vibrations are produced.
Which is the most preferred SI engines fuel?
Explanation: For S.I. engines fuel most preferred are aromatics while for C.I. engines fuel most preferred are paraffins.
What is the quality of petrol expressed?
octane number
Explanation : Ignition quality of petrol is expressed by octane number and that of diesel by cetane number.
Which of the following are qualities of a good fuel?
Ideal fuel has the following characteristics :
- It is readily available.
- It burns easily in the air at a moderate rate.
- It is less expensive.
- It produces a large amount of heat.
- It can be transported easily.
- It has a high calorific value.
- It does not leave behind any undesirable substances.
What are the qualities of an efficient fuel?
What are the characteristics of good CI engine fuel Mcq?
7-In order to have good engine performance
- The fuel should have low boiling temperature for lower warm up period.
- The percentage of volume evaporated at low temperatures should be small.
- A rich mixture of air-fuel ratio of 12 to 13:1 is considered to be suitable for easy starting of the engine.
- All of the above.
What is the advantage of gaseous fuel?
-It has high calorific value so it is more efficient for engines. -It produces a great amount of heat energy with combustion of only one kg fuel. -It does not leave any ash on burning unlike the solid and liquid fuels. -Gases are easily compressed hence it can be easily stored.
Which is the most preferred CI engines fuel?
paraffins
Explanation: For C.I. engines fuel most preferred are paraffins and for S.I. engines fuel most preferred are aromatics.
What is ignition lag in SI engine?
Ignition lag or ignition delay as the name suggests is the time interval between the passage of spark and the ignition of the fuel-air mixture.
What is a fuel What are the characteristics of a good fuel class 8?
It should be inexpensive. It should burn easily in air at a judicious rate. It should liberate large amount of heat. It should leave behind any undesirable residues.
What is the best SI engine fuel?
In general, the best SI engine fuel will be that having the highest antiknock property. S ince this permits the use of higher compression ratios and thus the engine thermal efficiency and the power output can be greatly increased. Petrol contains hydrocarbons.
What are the properties of gasoline to be used as fuel?
Petrol or gasoline is used as fuel in spark ignition (SI) engines. Gasoline is a hydrocarbon with different chemical compositions. Here are the properties that a gasoline should possess to qualify for being used as fuel in SI engines. slide 1 of 1. Petrol or gasoline is usually used as fuel for spark ignition (SI) engines.
What are the characteristics of ci engine fuel?
Viscosity:- CI engine fuel should be able to flow through the fuel system and the strainers under the lowest operating temperatures to which the engine is subjected to. Corrosion and Wear:- The fuel should not cause corrosion and wear of the engine components before or after combustion.
What type of fuel is used in spark ignition engines?
Petrol or gasoline is usually used as fuel for spark ignition (SI) engines. Gasoline is a mixture of a number of low boiling point paraffins, naphthenes, and aromatics of varying proportions.