Aha! big mistake. using logic. and also, this is NOT an english language test!
OK, about flat rated engine.
A flat rated engine will be rated like x thousand pounds of thrust at ISA+15.
eg, 22000 lbs. of thrust at ISA+15. Meaning, the engine is GUARANTEED by the manufacturer to produce the rated thrust (in this case 22000 pounds) as long as the temperature is NOT MORE than 30 deg. celsius.(ISA+15), hence the 'flat rating'. Simple right? IF you know the basics, yes!

Now, next question: what happened if the temperature is above 30 deg. celsius?
BTW, are we deviating from the topic? Maybe we should start a thread for LWTR questions huh?

QUOTE(Kabadi84 @ Jul 28 2006, 06:26 PM)
This post has been edited by jazzy939: Jul 28 2006, 08:42 PM