How well do you know your fuel colours?
Now, you will need to. For the PPL exam you need to be able to identify fuel colours. In practice, the idea is you need to ensure the right fuel is used to fill your aircraft's tanks. Using the wrong fuel can prove disastrous.
In case you didn't know: Avgas is aviation gasoline and Mogas (or Autogas) is motor gasoline
Here they are (sorted by octane ratings except for jet fuel) :
RED - Grade 80 or 80/87 is a used primarily in low compression ratio engines..
GREEN - 100/130 and P87-90 is also known as MOGAS or automobile gasoline.
BLUE - Grade 100LL is a medium power output fuel with low lead content (LL).
PURPLE - 115/145 - purple, primarily military use
STRAW (light yellow or colourless) - is jet fuel or also known as Kerosene. That's right, jets and rockets run on paraffin:)
If you didn't know most fuel is colourless, but they use fuel dyes to help differentiate them.
Hey, now you won't have a problem answering the following sample PPL exam question:
What grade of fuel is in your tanks when upon your review the fuel colour is blue?
- Grade 80 or 80/87
- Grade 100
- Grade 100LL
- Kerosene