Hello all:!
One again i've got some troubles in solving a few of my atpl questions. So thank you for those who will take the time necessary to answer those following (boring
) questions.
Here they are :
1- With a Constant Speed Unit (CSU) fitted, the pitch of the blades at fully 'FINE' and 'FEATHERED' is limited by :
a) engine oil forming a hydraulic lock.
b) mechanical stops.
c) by the pitch lever.
d) by the reverse pitch control lever.
I would go for B, but quite unsure.
2- Where is the greatest mechanical load felt on a propeller?
a) at the tip.
b) at the Master Station.
c) at the hub.
d) at the spinner.
Would say A.
3- A blade with a high camber :
a) absorbs less power than one with low camber.
b) is less affected by CTM (centrifugal twisting moment) than one with low camber.
c) aborbs more power than one with low camber.
d) is less affected by ATM (aerodynamic twisting moment) than one with a low camber.
4- An electrical feathering pump is used to :
a) feather the propeller only.
b) unfeather the propeller only.
c) do both of the above operations.
d) increase the picth on electrically controlled propellers.
5- A left handed propeller, when viewed from the front, turns :
a) clockwise.
b) anti-clockwise.
I don't understand where is the "datum' upon which we can determine the sense of rotation of a propeller. As regards to this question, shall we see the motion of the propeller from the front (facing it) or from the flight deck? I would rather say from the flight deck (which is the common way i think), which would therefore mean that answer A is correct.
Actually the word "handed" bothers me : i see a guy manually handling the propeller which would mean that the datum would be "when facing the plane".
Many thanks folks ! Hope my english was not too aweful.
