Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Petrol and Octane No

Fuel terms and definitions

Appearance of crude oil thick black liquid
The separating of substances according to their boiling points Fractional distillation
The 2 main fractions crude oil is broken into? Residual and Volatile fractions
Mercaptans Sulphur containing compounds added to natural gas to aid detection of leaks
What does LPG stand for? Liquefied Petroleum Gas
What is Naphtha used for? Used to make plastics
1 use of Bitumen Used in tarring roads
The early explosion of petrol in the cylinder of an engine Auto-ignition
Octane Rating = 0 Heptane
Octane Rating 100 2,2,4 tri methyl pentane
Octane Number The Octane Number is the measure of a fuels resistance to cause engine knocking
Sound caused in a car by auto-ignition Engine Knocking
3 factors which increase Octane Number? Addition of branches, shorter chain, addition of oxygenates
3 examples of Oxygenates added to fuel Methanol, Ethanol and MTBE
What does MTBE stand for? Methyl tertiary butyl ether
Isomerisation Turning straight chains into their isomers, making them shorter and creating more branches
Catalytic Cracking Breaking long chain hydrocarbons into shorter chains
Reforming Converting straight chain compounds into ring compounds, creating hydrogen as a by-product
Why is Benzene no longer added to petrol? Carcinogen
Why is lead no longer added to petrol? Poisonous to catalytic converters and the environment.
Created by: cbschemistry