Page 1 of 1

Engine quiz

Posted: Thu Jan 26, 2017 4:08 pm
by oldr_n_wsr
Take the quiz motorheads.
Two Stroke Engine Quiz

I got 27 out of 30.

Engine Quiz

Posted: Thu Jan 26, 2017 4:28 pm
by RayThom
You scored 20 out of 30

Damn! It looks like you're a bigger stroker than I am.

Re: Engine quiz

Posted: Thu Jan 26, 2017 6:37 pm
by Burning Petard
23/30 snailgate

Re: Engine quiz

Posted: Thu Jan 26, 2017 9:23 pm
by Bicycle Bill
21/30, and surprised I did that well.
But then what do I know about engines?  I'm a bicyclist.
Image
-"BB"-

Re: Engine quiz

Posted: Fri Jan 27, 2017 12:16 am
by MGMcAnick
You scored
25 out of 30

I had some lucky guesses too.

In my defense, the only two stroke engines I've ever owned are my Stihl chain and it's brother, a concrete cutting saw.

How should anyone know who invented or perfected the two stroke or when?

What the heck is asymmetrical cylinder timing?

It would seem to me that 50:1 is closer to 2 ounces per gallon than their 4 ounces per gallon answer. (Actually 2.56) I'll have to look at the tiny little bottle that came with my chainsaw. I kept it to measure the 2-cycle oil I buy in quart bottles.

How can oil, which is mixed 50:1 in the crankcase, be said to originate in the carburetor? Heck, it originates from some old dead dinosaur if not the crankcase or, in some cases a separate oil tank. I answered neither, and still think I'm right.

Re: Engine quiz

Posted: Fri Jan 27, 2017 9:42 am
by datsunaholic
I got 23 out of 30, several wrong guesses. And I agree with MGM- the oil doesn't originate in the carburetor. It originates in the fuel tank, and is often blended before it even gets there.

Re: Engine quiz

Posted: Fri Jan 27, 2017 2:51 pm
by Burning Petard
Some 2-cycle powered devices carry separate oil and gas tanks with separate feed lines to the carb. I did find it interesting that big ships (which use something very similar to road asphalt for fuel) are 2 cycle. Reminds me that the compression-ignition engine was first intended to run on powdered moss or coal dust, which meant very short bearing life. Modern metallurgy has made all kinds of weirdness commonplace.

snailgate

Re: Engine quiz

Posted: Fri Jan 27, 2017 6:58 pm
by oldr_n_wsr
As far as oil originating in the carb, I think they meant where does the lubricating oil come from into the engine. There is no oil pan so the oil to lube the crank/connecting rod comes from the carburator.

As for assymetrical timing, it has to do with the porting (of fuel/exhaust in and out of the cyclinder).
Here is a lengthy and a bit confusing explanation.
http://www.pattakon.com/pattakonPatAT.htm