EASA Part-66 Exam Preparation Online

Because mercury freezes near minus 39 degrees C, at minus 50 it is solid in the bulb and cannot rise, answer is B. Alcohol stays liquid to roughly minus 115 degrees C, so spirit thermometers are the standard choice for very low temperature measurement.

AnyaK replied to ztknpi666's question ·2h ago

what about the mercury why don't explain it

ztknpi666 asked a question ·2h ago

Yeah this one's tricky, the photos label them the same because on most airliners the same upper wing panels do both jobs. Answer is C, a speed brake is deployed to add drag so you slow down or descend steeper, whereas a spoiler's job is to kill the lift the wing is making, which is what those panels do when they go fully up on landing. Think of an umbrella, holding it open into the wind is the speed brake slowing you down, and folding it shut is the spoiler taking away what was holding it up. That's how I'd read it.

Lisa_T replied to wan.yc.justin's question ·3h ago

I fail to understand the different between speed brakes and spoilers. Even if i looked into google the photos basically identifies the spoiler parts as speed brakes as well.

wan.yc.justin asked a question ·14h ago

B. 4 3/8 is mixed number, means 4 + 3/8 and not 4 times 3/8, so 35/8 - 9/4 + 1/5 = 175/40 - 90/40 + 8/40 = 93/40 = 2 13/40.

Marek_AME replied to erik.daros.mac's question ·5d ago

Non è chiara la spiegazione, la notazione delle frazioni improprie è sbagliata

erik.daros.mac asked a question ·5d ago

Non si capisce il problema. Il punto B da quale parte della riva è? dalla parte dove devo arrivare o dove sono?

erik.daros.mac asked a question ·5d ago

Thank you for the report. You are right that the wording was ambiguous, and the stem has been corrected. The marked answer stands. What the question was describing is a nozzle at its design condition, with the throat choked and the exit flow supersonic. The gas arrives subsonic, accelerates through the converging section to reach Mach 1 at the throat, and then keeps accelerating through the diverging section as the now supersonic flow expands. Your reading was the reasonable one to take, and it is exactly why the stem needed changing. The area effect reverses either side of Mach 1: a converging duct accelerates subsonic flow, but it decelerates flow that is already supersonic. So on your reading of the old stem none of the three options would have been correct, which makes the wording a real defect rather than a matter of taste. Elsewhere in the bank that distinction is made explicit, with separate items keying air that enters a converging duct at sonic speed as decelerating. The st…

PART66Online replied to ewanroles13's question ·7d ago

The wording of the question suggests the airflow is supersonic before reaching the convergent-divergent nozzle

ewanroles13 asked a question ·7d ago

La doublure abradable est connue en nid d'abeille, en résine synthétique ou en plastique qui réduit le bruit. Il est fait également pour être poncé par les ailette de compresseur afin d'évité un espace.

hugohoarauhoarau replied to bucks's question ·9d ago