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What is the economic importance of aphids?
Aphids attack a number of crops and are vectors of many viruses attacking sweetpotato and other crops.
Importance of microeconomics?
importance of microeconomic
What is the importance of prosperity?
importance of prosperity
Reports on exports of Pakistan .pdf?
what are the major exports of pakistan. and its importance? what are the major exports of pakistan. and its importance? what are the major exports of pakistan. and its importance? what are the major exports of pakistan. and its importance? what are the major exports of pakistan. and its importance?
Importance of statistics to economics?
importance of statistics for an economist
How do you measure cetane number?
The fuel cetane number is defined as the amount of n-cetane present in a mixture of a-methylnaphthalene (CN=0) and n-cetane(CN=100).
What is the international norme for cetane index of diesel fuels?
U.S. goes by Cetane Number of 40 whereas EU follows a Cetane Index of 46 plus a Cetane Number of 51. Other countries either specify Cetane Number or Cetane index, some of them specify both. Cetane Number can be improved by adding chemical additives , the Cetane Index cannot be influenced since its a quality of base fuel.
What is cetane number for petrol?
There is no cetane number for petrol. Cetane is a measurement of Diesel fuel and Octane is a measure of Petrol. Each is a measure of the combustion ability. Cetane is a measure of the amount of time from injection of the fuel into the combustion chamber and the actual ignition of the fuel. Diesel's ignite the fuel through compression and not spark as in a petrol engine.
What is meant by cetane number?
A cetane number is a rating given to diesel fuels. It is a rating of how fast the diesel fuel ignites under compression. In diesel engines, there are no spark plugs and the engine uses compression (pressure) to cause ignition.
What is isohexane?
Isohexane (also known as 2-methylpentane) is an isomer of hexane. Its properties are essentially identical with n-hexane.
What octane is diesel?
Diesel has an octane number of about 15-25. The reason for this seemingly terrible number compared to the ones we're used to from gasoline is the fact that diesel is combusted in a totally different type of engine. Diesel has low volatility, low knock resistance, yet high energy per volume. Because of its low knock resistance, diesel should not be used in a gasoline engine as it will destroy it very quickly and efficiently. Generally speaking, diesel fuel ignition quality is not measured in octanes, as these are a unit for gasoline. A similar reference value, but for diesel, is the cetane rating. The higher the cetane number, the easier the fuel ignites when injected into an engine. The cetane number is determined by an engine test using two reference fuel blends of known cetane numbers. The reference fuels are prepared by blending normal cetane (n-hexadecane), having a value of 100, with heptamethyl nonane, having a value of 15. The higher the cetane rating, the higher the fuel's propensity to knock! Choosing a very high cetane number will not make the car run better, but using a fuel with too low cetane number may prevent the engine from starting or running.
Cetane number equals Diesel Index - 3?
Cetane number is derived from an engine test. It measures the ignition characteristics of diesel fuel, (which detonates under pressure). The higher the Cetane number, the greater the resistance to pre-ignition. A high cetane diesel can be used in high compression (more effcient) engines. Diesel Index (DI) is a calculation allowing an approximation of Cetane No., when there is no Cetane Test Engine available. The DI is derived from the Analine Point. The Analine Point is a temperature, where analine and the (diesel) sample become completely miscible. DIESEL INDEX = ((ANILINE POINT(DEG F))(API GRAVITY))/100 A higher aniline point (and therefore a lower aromatic content) in diesel oil is desirable, in order to prevent autoignition in diesel engines.
What is the octane rating of shell diesel fuel?
It should be listed on the pump. Generally speaking, diesel fuel ignition quality is not measured in octanes, as these are a unit for gasoline. Diesel fuel is measured in cetane not octane.Regular diesel--48Premium diesel--55Biodiesel (B100)--55Biodiesel blend (B20)--50Synthetic diesel--55A label should be affixed to the pump that states both the fuel type and cetane number. It's important to find a station that dispenses fuel of the cetane number recommended by the vehicle manufacturer.
How diesel index of a given oil sample is calculated?
The Diesel Index indicates the ignition quality of the fuel. It is found to correlate, approximately, to the cetane number of commercial fuels. It is obtained by the following equation
What is the importance of number 73 in mathematics?
It is a prime number
Why is the importance of the number two?
the number 2 is the only even prime number
What is the mathematical importance of imaginary numbers?
The mathematical importance of an imaginary number is to allow the result of a square root of the imaginary number to equal a negative number. One can find more extensive information on imaginary numbers and their importance on the Wikipedia website.
